TY  - JOUR
AU  - Stojković, Milica
AU  - Ristić, Mirjana
AU  - Đolić, Maja
AU  - Perić Grujić, Aleksandra
AU  - Onjia, Antonije
PY  - 2024
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/7456
AB  - Considering the rising demand for rare earth elements (REEs), researchers are looking for new sources for their extraction, thereby fostering economic and environmentally justified processing solutions. Among potential industrial sources, coal fly ash emerges as one of the most promising. The recovery of REEs from coal fly and bottom ashes derived from different thermal power plants was the main focus of this study. A dual-step methodology was conducted on ash samples, which involved an ultrasonic roasting process to disintegrate the silica matrix, followed by a microwave-assisted acid leaching step to extract REEs. The roasting procedure was studied using the Plackett–Burman design, and the Box–Behnken design was subsequently implemented to optimize the leaching procedure. The optimized ultrasonic roasting procedure was set up at 95 °C for 10 min with an ash-to-roasting agent (3M NaOH) ratio of 0.5:1 (m/V). For acid leaching, the optimal conditions were obtained at 174 °C for 30 min with an HCl ÷ HNO3 mixture (1:1 V/V). The standard reference material (NIST 1633c) was used in the conclusive experiments to estimate the average recovery (80%) of REEs. The green aspects of this methodology were evaluated using several metrics (atom economy, E-factor, and energy consumption). The proposed process outperforms high-temperature roasting procedures in terms of greenness; however, the REE recovery rate is lower.
PB  - MDPI
T2  - Metals
T1  - Recovery of Rare Earth Elements from Coal Fly and Bottom Ashes by Ultrasonic Roasting Followed by Microwave Leaching
IS  - 4
SP  - 371
VL  - 14
DO  - 10.3390/met14040371
ER  - 

@article{
author = "Stojković, Milica and Ristić, Mirjana and Đolić, Maja and Perić Grujić, Aleksandra and Onjia, Antonije",
year = "2024",
abstract = "Considering the rising demand for rare earth elements (REEs), researchers are looking for new sources for their extraction, thereby fostering economic and environmentally justified processing solutions. Among potential industrial sources, coal fly ash emerges as one of the most promising. The recovery of REEs from coal fly and bottom ashes derived from different thermal power plants was the main focus of this study. A dual-step methodology was conducted on ash samples, which involved an ultrasonic roasting process to disintegrate the silica matrix, followed by a microwave-assisted acid leaching step to extract REEs. The roasting procedure was studied using the Plackett–Burman design, and the Box–Behnken design was subsequently implemented to optimize the leaching procedure. The optimized ultrasonic roasting procedure was set up at 95 °C for 10 min with an ash-to-roasting agent (3M NaOH) ratio of 0.5:1 (m/V). For acid leaching, the optimal conditions were obtained at 174 °C for 30 min with an HCl ÷ HNO3 mixture (1:1 V/V). The standard reference material (NIST 1633c) was used in the conclusive experiments to estimate the average recovery (80%) of REEs. The green aspects of this methodology were evaluated using several metrics (atom economy, E-factor, and energy consumption). The proposed process outperforms high-temperature roasting procedures in terms of greenness; however, the REE recovery rate is lower.",
publisher = "MDPI",
journal = "Metals",
title = "Recovery of Rare Earth Elements from Coal Fly and Bottom Ashes by Ultrasonic Roasting Followed by Microwave Leaching",
number = "4",
pages = "371",
volume = "14",
doi = "10.3390/met14040371"
}

Stojković, M., Ristić, M., Đolić, M., Perić Grujić, A.,& Onjia, A.. (2024). Recovery of Rare Earth Elements from Coal Fly and Bottom Ashes by Ultrasonic Roasting Followed by Microwave Leaching. in Metals
MDPI., 14(4), 371.
https://doi.org/10.3390/met14040371

Stojković M, Ristić M, Đolić M, Perić Grujić A, Onjia A. Recovery of Rare Earth Elements from Coal Fly and Bottom Ashes by Ultrasonic Roasting Followed by Microwave Leaching. in Metals. 2024;14(4):371.
doi:10.3390/met14040371 .

Stojković, Milica, Ristić, Mirjana, Đolić, Maja, Perić Grujić, Aleksandra, Onjia, Antonije, "Recovery of Rare Earth Elements from Coal Fly and Bottom Ashes by Ultrasonic Roasting Followed by Microwave Leaching" in Metals, 14, no. 4 (2024):371,
https://doi.org/10.3390/met14040371 . .

TY  - JOUR
AU  - Vesković, Jelena
AU  - Lučić, Milica
AU  - Ristić, Mirjana
AU  - Perić-Grujić, Aleksandra
AU  - Onjia, Antonije
PY  - 2024
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/7158
AB  - This study investigated the occurrence and distribution of rare earth elements (REEs), including 14 lanthanoids, scandium (Sc), and yttrium (Y), in groundwater around a large coal-fired thermal power plant (TPP). The ICP-MS technique was used to analyze 16 REEs in groundwater samples collected from monitoring wells. REE concentrations ranged from 59.9 to 758 ng/L, with an average of 290 ng/L. The most abundant was Sc, followed by La, accounting for 54.2% and 21.4% of the total REE concentration, respectively. Geospatial analysis revealed the REE enrichment at several hotspots near the TPP. The highest REE concentrations were observed near the TPP and ash landfill, decreasing with the distance from the plant and the landfill. REE fractionation ratios and anomalies suggested the Light REE dominance, comprising over 78% of the total REEs. Correlation and principal component analyses indicated similar behavior and sources for most REEs. Health risk assessment found hazard indices (HI) of 1.36 × 10−3 and 1.98 × 10−3 for adults and children, respectively, which are far below the permissible limit (HI = 1). Likewise, incremental lifetime cancer risks (ILCR) were all below 1 × 10−6. Nevertheless, ongoing ash disposal and potential accumulation in the environment could elevate the REE exposure over time.
PB  - MDPI
T2  - Toxics
T1  - Spatial Variability of Rare Earth Elements in Groundwater in the Vicinity of a Coal-Fired Power Plant and Associated Health Risk
IS  - 1
SP  - 62
VL  - 12
DO  - 10.3390/toxics12010062
ER  - 

@article{
author = "Vesković, Jelena and Lučić, Milica and Ristić, Mirjana and Perić-Grujić, Aleksandra and Onjia, Antonije",
year = "2024",
abstract = "This study investigated the occurrence and distribution of rare earth elements (REEs), including 14 lanthanoids, scandium (Sc), and yttrium (Y), in groundwater around a large coal-fired thermal power plant (TPP). The ICP-MS technique was used to analyze 16 REEs in groundwater samples collected from monitoring wells. REE concentrations ranged from 59.9 to 758 ng/L, with an average of 290 ng/L. The most abundant was Sc, followed by La, accounting for 54.2% and 21.4% of the total REE concentration, respectively. Geospatial analysis revealed the REE enrichment at several hotspots near the TPP. The highest REE concentrations were observed near the TPP and ash landfill, decreasing with the distance from the plant and the landfill. REE fractionation ratios and anomalies suggested the Light REE dominance, comprising over 78% of the total REEs. Correlation and principal component analyses indicated similar behavior and sources for most REEs. Health risk assessment found hazard indices (HI) of 1.36 × 10−3 and 1.98 × 10−3 for adults and children, respectively, which are far below the permissible limit (HI = 1). Likewise, incremental lifetime cancer risks (ILCR) were all below 1 × 10−6. Nevertheless, ongoing ash disposal and potential accumulation in the environment could elevate the REE exposure over time.",
publisher = "MDPI",
journal = "Toxics",
title = "Spatial Variability of Rare Earth Elements in Groundwater in the Vicinity of a Coal-Fired Power Plant and Associated Health Risk",
number = "1",
pages = "62",
volume = "12",
doi = "10.3390/toxics12010062"
}

Vesković, J., Lučić, M., Ristić, M., Perić-Grujić, A.,& Onjia, A.. (2024). Spatial Variability of Rare Earth Elements in Groundwater in the Vicinity of a Coal-Fired Power Plant and Associated Health Risk. in Toxics
MDPI., 12(1), 62.
https://doi.org/10.3390/toxics12010062

Vesković J, Lučić M, Ristić M, Perić-Grujić A, Onjia A. Spatial Variability of Rare Earth Elements in Groundwater in the Vicinity of a Coal-Fired Power Plant and Associated Health Risk. in Toxics. 2024;12(1):62.
doi:10.3390/toxics12010062 .

Vesković, Jelena, Lučić, Milica, Ristić, Mirjana, Perić-Grujić, Aleksandra, Onjia, Antonije, "Spatial Variability of Rare Earth Elements in Groundwater in the Vicinity of a Coal-Fired Power Plant and Associated Health Risk" in Toxics, 12, no. 1 (2024):62,
https://doi.org/10.3390/toxics12010062 . .

TY  - JOUR
AU  - Janković, Andrija Z.
AU  - Ćujić, Mirjana R.
AU  - Stojković, Milica D.
AU  - Đolić, Maja B.
AU  - Živojinović, Dragana Z.
AU  - Onjia, Antonije E.
AU  - Ristić, Mirjana Đ.
AU  - Perić Grujić, Aleksandra A.
PY  - 2024
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/7362
AB  - In this work, removal of heavy metals (Cr, Mn, Co, Ni, Cu, Zn, As, Cd, and Pb) from fly ash has been studied using acid leaching and wet oxidation methods. In parallel, microwave-assisted acid digestion was applied for determination of pseudo-total concentrations of heavy metals to estimate the leaching efficiency. Multivariate statistics (Pearson correlation, principal component analysis, and hierarchical cluster analysis) have shown two dominant groups of elements, depending on their characteristics and affinity towards the ash solid phase. Thus, Cr, Zn, Mn, Co, and Ni belong to the group I, while Pb, As, Cd, and Cu belong to the group II. It was demonstrated that the wet oxidation method was more suitable than acid leaching since the reduction in metal concentration was 30 to 75 % compared to 12 to 25 % obtained by acid digestion. The influence of fly ash treatment on the residue characteristics was investigated by X-ray diffractometry and scanning electron microscopy. The analyses revealed surface and structure changes of fly ash after the wet oxidation treatment. Overall, wet oxidation could be an appropriate treatment for heavy metal removal from fly ash, providing a material that could be further used, thus reducing the risk of pollution caused by the disposal of coal combustion fly ash. © 2024, Association of the Chemical Engineers of Serbia.
AB  - Uklanjanje teških metala (Cr, Mn, Co, Ni, Cu, Zn, As, Cd i Pb) iz elektrofilterskog pepela proučavano je korišćenjem metoda kiselog luženja i vlažne oksidacije. Paralelno je primenjena i kisela digestija uz pomoć mikrotalasne pećnice za određivanje pseudoukupnih koncentracija teških metala u cilju procene efikasnosti luženja. Multivarijantna statistika (Pearsonova korelacija, analiza glavnih komponenti i hijerarhijska klaster analiza) pokazala je dve dominantne grupe elemenata u zavisnosti od njihovih karakteristika i afiniteta prema čvrstoj fazi pepela. Grupe I (Cr, Zn, Mn, Co i Ni) i II (Pb, As, Cd i Cu) su međusobno diskriminisane. Pokazalo se da je metoda vlažne oksidacije prikladnija od kiselog luženja jer je smanjenje koncentracija metala bilo 30-75 % u poređenju sa 12-25 % dobijenih kiselom digestijom. Takođe je ispitan uticaj tretmana letećeg pepela na karakteristike čvrstog ostatka metodama rendgenske difrakcije i skenirajuće elektronske mikroskopije. Ovim metodama su otkrivene promene na površini i u strukturi letećeg pepela nakon tretmana vlažnom oksidacijom. Vlažna oksidacija se može smatrati kao moguća metoda za tretman u cilju uklanjanje teških metala iz letećeg pepela, obezbeđujući materijal koji bi se mogao dalje koristiti i smanjujući rizik od zagađenja izazvanog odlaganjem letećeg pepela.
PB  - Savez hemijskih inženjera Srbije
T2  - Hemijska industrija
T1  - Impact of leaching procedure on heavy metals removal from coal fly ash
T1  - Uticaj metode izluživanja na uklanjanje teških metala iz letećeg pepela
EP  - 62
IS  - 1
SP  - 51
VL  - 78
DO  - 10.2298/HEMIND230901001J
ER  - 

@article{
author = "Janković, Andrija Z. and Ćujić, Mirjana R. and Stojković, Milica D. and Đolić, Maja B. and Živojinović, Dragana Z. and Onjia, Antonije E. and Ristić, Mirjana Đ. and Perić Grujić, Aleksandra A.",
year = "2024",
abstract = "In this work, removal of heavy metals (Cr, Mn, Co, Ni, Cu, Zn, As, Cd, and Pb) from fly ash has been studied using acid leaching and wet oxidation methods. In parallel, microwave-assisted acid digestion was applied for determination of pseudo-total concentrations of heavy metals to estimate the leaching efficiency. Multivariate statistics (Pearson correlation, principal component analysis, and hierarchical cluster analysis) have shown two dominant groups of elements, depending on their characteristics and affinity towards the ash solid phase. Thus, Cr, Zn, Mn, Co, and Ni belong to the group I, while Pb, As, Cd, and Cu belong to the group II. It was demonstrated that the wet oxidation method was more suitable than acid leaching since the reduction in metal concentration was 30 to 75 % compared to 12 to 25 % obtained by acid digestion. The influence of fly ash treatment on the residue characteristics was investigated by X-ray diffractometry and scanning electron microscopy. The analyses revealed surface and structure changes of fly ash after the wet oxidation treatment. Overall, wet oxidation could be an appropriate treatment for heavy metal removal from fly ash, providing a material that could be further used, thus reducing the risk of pollution caused by the disposal of coal combustion fly ash. © 2024, Association of the Chemical Engineers of Serbia., Uklanjanje teških metala (Cr, Mn, Co, Ni, Cu, Zn, As, Cd i Pb) iz elektrofilterskog pepela proučavano je korišćenjem metoda kiselog luženja i vlažne oksidacije. Paralelno je primenjena i kisela digestija uz pomoć mikrotalasne pećnice za određivanje pseudoukupnih koncentracija teških metala u cilju procene efikasnosti luženja. Multivarijantna statistika (Pearsonova korelacija, analiza glavnih komponenti i hijerarhijska klaster analiza) pokazala je dve dominantne grupe elemenata u zavisnosti od njihovih karakteristika i afiniteta prema čvrstoj fazi pepela. Grupe I (Cr, Zn, Mn, Co i Ni) i II (Pb, As, Cd i Cu) su međusobno diskriminisane. Pokazalo se da je metoda vlažne oksidacije prikladnija od kiselog luženja jer je smanjenje koncentracija metala bilo 30-75 % u poređenju sa 12-25 % dobijenih kiselom digestijom. Takođe je ispitan uticaj tretmana letećeg pepela na karakteristike čvrstog ostatka metodama rendgenske difrakcije i skenirajuće elektronske mikroskopije. Ovim metodama su otkrivene promene na površini i u strukturi letećeg pepela nakon tretmana vlažnom oksidacijom. Vlažna oksidacija se može smatrati kao moguća metoda za tretman u cilju uklanjanje teških metala iz letećeg pepela, obezbeđujući materijal koji bi se mogao dalje koristiti i smanjujući rizik od zagađenja izazvanog odlaganjem letećeg pepela.",
publisher = "Savez hemijskih inženjera Srbije",
journal = "Hemijska industrija",
title = "Impact of leaching procedure on heavy metals removal from coal fly ash, Uticaj metode izluživanja na uklanjanje teških metala iz letećeg pepela",
pages = "62-51",
number = "1",
volume = "78",
doi = "10.2298/HEMIND230901001J"
}

Janković, A. Z., Ćujić, M. R., Stojković, M. D., Đolić, M. B., Živojinović, D. Z., Onjia, A. E., Ristić, M. Đ.,& Perić Grujić, A. A.. (2024). Impact of leaching procedure on heavy metals removal from coal fly ash. in Hemijska industrija
Savez hemijskih inženjera Srbije., 78(1), 51-62.
https://doi.org/10.2298/HEMIND230901001J

Janković AZ, Ćujić MR, Stojković MD, Đolić MB, Živojinović DZ, Onjia AE, Ristić MĐ, Perić Grujić AA. Impact of leaching procedure on heavy metals removal from coal fly ash. in Hemijska industrija. 2024;78(1):51-62.
doi:10.2298/HEMIND230901001J .

Janković, Andrija Z., Ćujić, Mirjana R., Stojković, Milica D., Đolić, Maja B., Živojinović, Dragana Z., Onjia, Antonije E., Ristić, Mirjana Đ., Perić Grujić, Aleksandra A., "Impact of leaching procedure on heavy metals removal from coal fly ash" in Hemijska industrija, 78, no. 1 (2024):51-62,
https://doi.org/10.2298/HEMIND230901001J . .

TY  - JOUR
AU  - Karić, Nataša
AU  - Vukčević, Marija
AU  - Maletić, Marina
AU  - Dimitrijević, Silvana
AU  - Ristić, Mirjana
AU  - Perić-Grujić, Aleksandra
AU  - Trivunac, Katarina
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6359
AB  - In this study, an environmentally sustainable process of crystal violet, congo red, methylene
blue, brilliant green, Pb2+, Cd2+, and Zn2+ ions adsorption from aqueous solutions onto aminomodified starch derivatives was investigated. The degree of substitution, elemental analysis,
swelling capacity, solubility, and FTIR, XRD, and SEM techniques were used to characterize
the adsorbents. The influence of pH, contact time, temperature, and initial concentration has
been studied to optimize the adsorption conditions. The amino-modified starch was the most
effective in removing crystal violet (CV) (65.31-80.46%) and Pb2+ (67.44-80.33%) within the
optimal adsorption conditions (pH 5, 10 mg dm-3, 25 oC, 180 min). The adsorption of CV could be described by both Langmuir and Freundlich adsorption isotherms, while the
adsorption of Pb2+ ions was better described by the Langmuir isotherm. The pseudo-second
order model can be used to describe the adsorption kinetics of CV and Pb2+ on all tested
samples. The thermodynamic study indicated that the adsorption of CV was exothermic,
while the Pb2+ adsorption was endothermic. The simultaneous removal of CV and Pb2+ from
the binary mixture has shown their competitive behavior. Thus, the amino-modified starch is
a promising eco-friendly adsorbent for the removal of dyes and heavy metals from polluted
water.
T2  - International Journal of Biological Macromolecules
T1  - Physico-chemical, structural, and adsorption properties of amino-modified starch derivatives for the removal of (in)organic pollutants from aqueous solutions
SP  - 124527
VL  - 241
DO  - 10.1016/j.ijbiomac.2023.124527
ER  - 

@article{
author = "Karić, Nataša and Vukčević, Marija and Maletić, Marina and Dimitrijević, Silvana and Ristić, Mirjana and Perić-Grujić, Aleksandra and Trivunac, Katarina",
year = "2023",
abstract = "In this study, an environmentally sustainable process of crystal violet, congo red, methylene
blue, brilliant green, Pb2+, Cd2+, and Zn2+ ions adsorption from aqueous solutions onto aminomodified starch derivatives was investigated. The degree of substitution, elemental analysis,
swelling capacity, solubility, and FTIR, XRD, and SEM techniques were used to characterize
the adsorbents. The influence of pH, contact time, temperature, and initial concentration has
been studied to optimize the adsorption conditions. The amino-modified starch was the most
effective in removing crystal violet (CV) (65.31-80.46%) and Pb2+ (67.44-80.33%) within the
optimal adsorption conditions (pH 5, 10 mg dm-3, 25 oC, 180 min). The adsorption of CV could be described by both Langmuir and Freundlich adsorption isotherms, while the
adsorption of Pb2+ ions was better described by the Langmuir isotherm. The pseudo-second
order model can be used to describe the adsorption kinetics of CV and Pb2+ on all tested
samples. The thermodynamic study indicated that the adsorption of CV was exothermic,
while the Pb2+ adsorption was endothermic. The simultaneous removal of CV and Pb2+ from
the binary mixture has shown their competitive behavior. Thus, the amino-modified starch is
a promising eco-friendly adsorbent for the removal of dyes and heavy metals from polluted
water.",
journal = "International Journal of Biological Macromolecules",
title = "Physico-chemical, structural, and adsorption properties of amino-modified starch derivatives for the removal of (in)organic pollutants from aqueous solutions",
pages = "124527",
volume = "241",
doi = "10.1016/j.ijbiomac.2023.124527"
}

Karić, N., Vukčević, M., Maletić, M., Dimitrijević, S., Ristić, M., Perić-Grujić, A.,& Trivunac, K.. (2023). Physico-chemical, structural, and adsorption properties of amino-modified starch derivatives for the removal of (in)organic pollutants from aqueous solutions. in International Journal of Biological Macromolecules, 241, 124527.
https://doi.org/10.1016/j.ijbiomac.2023.124527

Karić N, Vukčević M, Maletić M, Dimitrijević S, Ristić M, Perić-Grujić A, Trivunac K. Physico-chemical, structural, and adsorption properties of amino-modified starch derivatives for the removal of (in)organic pollutants from aqueous solutions. in International Journal of Biological Macromolecules. 2023;241:124527.
doi:10.1016/j.ijbiomac.2023.124527 .

Karić, Nataša, Vukčević, Marija, Maletić, Marina, Dimitrijević, Silvana, Ristić, Mirjana, Perić-Grujić, Aleksandra, Trivunac, Katarina, "Physico-chemical, structural, and adsorption properties of amino-modified starch derivatives for the removal of (in)organic pollutants from aqueous solutions" in International Journal of Biological Macromolecules, 241 (2023):124527,
https://doi.org/10.1016/j.ijbiomac.2023.124527 . .

TY  - JOUR
AU  - Karić, Nataša
AU  - Vukčević, Marija
AU  - Maletić, Marina
AU  - Dimitrijević, Silvana
AU  - Ristić, Mirjana
AU  - Perić Grujić, Aleksandra
AU  - Trivunac, Katarina
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6367
AB  - In this study, an environmentally sustainable process of crystal violet, congo red, methylene blue, brilliant green, Pb2+, Cd2+, and Zn2+ ions adsorption from aqueous solutions onto amino-modified starch derivatives was investigated. The degree of substitution, elemental analysis, swelling capacity, solubility, and FTIR, XRD, and SEM techniques were used to characterize the adsorbents. The influence of pH, contact time, temperature, and initial concentration has been studied to optimize the adsorption conditions. The amino-modified starch was the most effective in removing crystal violet (CV) (65.31–80.46 %) and Pb2+ (67.44–80.33 %) within the optimal adsorption conditions (pH 5, 10 mg dm−3, 25 °C, 180 min). The adsorption of CV could be described by both Langmuir and Freundlich adsorption isotherms, while the adsorption of Pb2+ ions was better described by the Langmuir isotherm. The pseudo-second order model can be used to describe the adsorption kinetics of CV and Pb2+ on all tested samples. The thermodynamic study indicated that the adsorption of CV was exothermic, while the Pb2+ adsorption was endothermic. The simultaneous removal of CV and Pb2+ from the binary mixture has shown their competitive behavior. Thus, the amino-modified starch is a promising eco-friendly adsorbent for the removal of dyes and heavy metals from polluted water.
PB  - Elsevier B.V.
T2  - International Journal of Biological Macromolecules
T1  - Physico-chemical, structural, and adsorption properties of amino-modified starch derivatives for the removal of (in)organic pollutants from aqueous solutions
SP  - 124527
VL  - 241
DO  - 10.1016/j.ijbiomac.2023.124527
ER  - 

@article{
author = "Karić, Nataša and Vukčević, Marija and Maletić, Marina and Dimitrijević, Silvana and Ristić, Mirjana and Perić Grujić, Aleksandra and Trivunac, Katarina",
year = "2023",
abstract = "In this study, an environmentally sustainable process of crystal violet, congo red, methylene blue, brilliant green, Pb2+, Cd2+, and Zn2+ ions adsorption from aqueous solutions onto amino-modified starch derivatives was investigated. The degree of substitution, elemental analysis, swelling capacity, solubility, and FTIR, XRD, and SEM techniques were used to characterize the adsorbents. The influence of pH, contact time, temperature, and initial concentration has been studied to optimize the adsorption conditions. The amino-modified starch was the most effective in removing crystal violet (CV) (65.31–80.46 %) and Pb2+ (67.44–80.33 %) within the optimal adsorption conditions (pH 5, 10 mg dm−3, 25 °C, 180 min). The adsorption of CV could be described by both Langmuir and Freundlich adsorption isotherms, while the adsorption of Pb2+ ions was better described by the Langmuir isotherm. The pseudo-second order model can be used to describe the adsorption kinetics of CV and Pb2+ on all tested samples. The thermodynamic study indicated that the adsorption of CV was exothermic, while the Pb2+ adsorption was endothermic. The simultaneous removal of CV and Pb2+ from the binary mixture has shown their competitive behavior. Thus, the amino-modified starch is a promising eco-friendly adsorbent for the removal of dyes and heavy metals from polluted water.",
publisher = "Elsevier B.V.",
journal = "International Journal of Biological Macromolecules",
title = "Physico-chemical, structural, and adsorption properties of amino-modified starch derivatives for the removal of (in)organic pollutants from aqueous solutions",
pages = "124527",
volume = "241",
doi = "10.1016/j.ijbiomac.2023.124527"
}

Karić, N., Vukčević, M., Maletić, M., Dimitrijević, S., Ristić, M., Perić Grujić, A.,& Trivunac, K.. (2023). Physico-chemical, structural, and adsorption properties of amino-modified starch derivatives for the removal of (in)organic pollutants from aqueous solutions. in International Journal of Biological Macromolecules
Elsevier B.V.., 241, 124527.
https://doi.org/10.1016/j.ijbiomac.2023.124527

Karić N, Vukčević M, Maletić M, Dimitrijević S, Ristić M, Perić Grujić A, Trivunac K. Physico-chemical, structural, and adsorption properties of amino-modified starch derivatives for the removal of (in)organic pollutants from aqueous solutions. in International Journal of Biological Macromolecules. 2023;241:124527.
doi:10.1016/j.ijbiomac.2023.124527 .

Karić, Nataša, Vukčević, Marija, Maletić, Marina, Dimitrijević, Silvana, Ristić, Mirjana, Perić Grujić, Aleksandra, Trivunac, Katarina, "Physico-chemical, structural, and adsorption properties of amino-modified starch derivatives for the removal of (in)organic pollutants from aqueous solutions" in International Journal of Biological Macromolecules, 241 (2023):124527,
https://doi.org/10.1016/j.ijbiomac.2023.124527 . .

TY  - CONF
AU  - Karić, Nataša
AU  - Vukčević, Marija
AU  - Maletić, Marina
AU  - Ristić, Mirjana
AU  - Perić-Grujić, Aleksandra
AU  - Trivunac, Katarina V.
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6998
AB  - Organic and inorganic pollutants, accumulated in the environment, could pose a potential danger to living organisms. Some of these pollutants negatively affect the physiological activities of living organisms, and in certain concentrations, they can be lethal to biotic communities. In addition to the natural sources of emission of these substances in the environment, a large number of anthropogenic activities contribute to a sudden increase in their concentration. The development of new and improving existing ecologically sustainable techniques to prevent or reduce their outflow and retention in the environment is more necessary than ever. Therefore, the focus of this work will be examining the efficiency of 
 environmentally friendly adsorbent based on modified starch and diatomaceous earth for the removal of selected organic and inorganic pollutants from aqueous solutions. The influence of the chemical modification of starch, followed by the addition of diatomaceous earth, on its structural, morphological, and adsorption properties, will be examined. The possibility of using starch-diatomaceous earth adsorbent for the removal of brilliant green dye, pharmaceutical compounds, and lead ions from aqueous solutions will be evaluated through the adsorption efficiency under the given conditions.
PB  - Belgrade : The Academy of Applied Technical Studies "Belgrade"
C3  - Conference Proceedings / International Scientific and Professional Conference Politehnika 2023, Belgrade, 15th December 2023
T1  - Removal of organic and inorganic pollutants from aqueous solutions using starch-diatomaceous earth adsorbent
EP  - 65
SP  - 60
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6998
ER  - 

@conference{
author = "Karić, Nataša and Vukčević, Marija and Maletić, Marina and Ristić, Mirjana and Perić-Grujić, Aleksandra and Trivunac, Katarina V.",
year = "2023",
abstract = "Organic and inorganic pollutants, accumulated in the environment, could pose a potential danger to living organisms. Some of these pollutants negatively affect the physiological activities of living organisms, and in certain concentrations, they can be lethal to biotic communities. In addition to the natural sources of emission of these substances in the environment, a large number of anthropogenic activities contribute to a sudden increase in their concentration. The development of new and improving existing ecologically sustainable techniques to prevent or reduce their outflow and retention in the environment is more necessary than ever. Therefore, the focus of this work will be examining the efficiency of 
 environmentally friendly adsorbent based on modified starch and diatomaceous earth for the removal of selected organic and inorganic pollutants from aqueous solutions. The influence of the chemical modification of starch, followed by the addition of diatomaceous earth, on its structural, morphological, and adsorption properties, will be examined. The possibility of using starch-diatomaceous earth adsorbent for the removal of brilliant green dye, pharmaceutical compounds, and lead ions from aqueous solutions will be evaluated through the adsorption efficiency under the given conditions.",
publisher = "Belgrade : The Academy of Applied Technical Studies "Belgrade"",
journal = "Conference Proceedings / International Scientific and Professional Conference Politehnika 2023, Belgrade, 15th December 2023",
title = "Removal of organic and inorganic pollutants from aqueous solutions using starch-diatomaceous earth adsorbent",
pages = "65-60",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6998"
}

Karić, N., Vukčević, M., Maletić, M., Ristić, M., Perić-Grujić, A.,& Trivunac, K. V.. (2023). Removal of organic and inorganic pollutants from aqueous solutions using starch-diatomaceous earth adsorbent. in Conference Proceedings / International Scientific and Professional Conference Politehnika 2023, Belgrade, 15th December 2023
Belgrade : The Academy of Applied Technical Studies "Belgrade"., 60-65.
https://hdl.handle.net/21.15107/rcub_technorep_6998

Karić N, Vukčević M, Maletić M, Ristić M, Perić-Grujić A, Trivunac KV. Removal of organic and inorganic pollutants from aqueous solutions using starch-diatomaceous earth adsorbent. in Conference Proceedings / International Scientific and Professional Conference Politehnika 2023, Belgrade, 15th December 2023. 2023;:60-65.
https://hdl.handle.net/21.15107/rcub_technorep_6998 .

Karić, Nataša, Vukčević, Marija, Maletić, Marina, Ristić, Mirjana, Perić-Grujić, Aleksandra, Trivunac, Katarina V., "Removal of organic and inorganic pollutants from aqueous solutions using starch-diatomaceous earth adsorbent" in Conference Proceedings / International Scientific and Professional Conference Politehnika 2023, Belgrade, 15th December 2023 (2023):60-65,
https://hdl.handle.net/21.15107/rcub_technorep_6998 .

TY  - JOUR
AU  - Buha Marković, Jovana Z.
AU  - Marinković, Ana D.
AU  - Savić, Jasmina Z.
AU  - Mladenović, Milica R.
AU  - Erić, Milić D.
AU  - Marković, Zoran J.
AU  - Ristić, Mirjana Đ.
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6369
AB  - Emission factors (EFs) of gaseous pollutants, particulate matter, certain harmful trace elements, and polycyclic aromatic hydrocarbons (PAHs) from three thermal power plants (TPPs) and semi-industrial fluidized bed boiler (FBB) were compared. EFs of particulate matter, trace elements (except Cd and Pb), benzo[a]pyrene, and benzo[b]fluoranthene exceed the upper limits specified in the EMEP inventory guidebook for all combustion facilities. The comparison of trace elements and PAHs content in fly ashes (FAs) from lignite and coal waste combustion in TPPs and FBB, respectively, as well as the potential environmental impact of FAs disposal, was performed by employing a set of ecological indicators such as crustal enrichment factor, risk assessment code, risk indices for trace elements, and benzo[a]pyrene equivalent concentration for PAHs. Sequential analysis shows that the trace elements portion is the lowest for water-soluble and exchangeable fractions. The highest enrichment levels in FAs are noticed for As and Hg. Based on toxic trace elements content, FAs from TPPs represent a very high ecological risk, whereas fly ash from FBB poses a moderate ecological risk but has the highest benzo[a]pyrene equivalent concentration, indicating its increased carcinogenic potential. Lead isotope ratios for Serbian coals and FAs can contribute to a lead pollution global database.
PB  - MDPI
T2  - Toxics
T1  - Risk Evaluation of Pollutants Emission from Coal and Coal Waste Combustion Plants and Environmental Impact of Fly Ash Landfilling
IS  - 4
SP  - 396
VL  - 11
DO  - 10.3390/toxics11040396
ER  - 

@article{
author = "Buha Marković, Jovana Z. and Marinković, Ana D. and Savić, Jasmina Z. and Mladenović, Milica R. and Erić, Milić D. and Marković, Zoran J. and Ristić, Mirjana Đ.",
year = "2023",
abstract = "Emission factors (EFs) of gaseous pollutants, particulate matter, certain harmful trace elements, and polycyclic aromatic hydrocarbons (PAHs) from three thermal power plants (TPPs) and semi-industrial fluidized bed boiler (FBB) were compared. EFs of particulate matter, trace elements (except Cd and Pb), benzo[a]pyrene, and benzo[b]fluoranthene exceed the upper limits specified in the EMEP inventory guidebook for all combustion facilities. The comparison of trace elements and PAHs content in fly ashes (FAs) from lignite and coal waste combustion in TPPs and FBB, respectively, as well as the potential environmental impact of FAs disposal, was performed by employing a set of ecological indicators such as crustal enrichment factor, risk assessment code, risk indices for trace elements, and benzo[a]pyrene equivalent concentration for PAHs. Sequential analysis shows that the trace elements portion is the lowest for water-soluble and exchangeable fractions. The highest enrichment levels in FAs are noticed for As and Hg. Based on toxic trace elements content, FAs from TPPs represent a very high ecological risk, whereas fly ash from FBB poses a moderate ecological risk but has the highest benzo[a]pyrene equivalent concentration, indicating its increased carcinogenic potential. Lead isotope ratios for Serbian coals and FAs can contribute to a lead pollution global database.",
publisher = "MDPI",
journal = "Toxics",
title = "Risk Evaluation of Pollutants Emission from Coal and Coal Waste Combustion Plants and Environmental Impact of Fly Ash Landfilling",
number = "4",
pages = "396",
volume = "11",
doi = "10.3390/toxics11040396"
}

Buha Marković, J. Z., Marinković, A. D., Savić, J. Z., Mladenović, M. R., Erić, M. D., Marković, Z. J.,& Ristić, M. Đ.. (2023). Risk Evaluation of Pollutants Emission from Coal and Coal Waste Combustion Plants and Environmental Impact of Fly Ash Landfilling. in Toxics
MDPI., 11(4), 396.
https://doi.org/10.3390/toxics11040396

Buha Marković JZ, Marinković AD, Savić JZ, Mladenović MR, Erić MD, Marković ZJ, Ristić MĐ. Risk Evaluation of Pollutants Emission from Coal and Coal Waste Combustion Plants and Environmental Impact of Fly Ash Landfilling. in Toxics. 2023;11(4):396.
doi:10.3390/toxics11040396 .

Buha Marković, Jovana Z., Marinković, Ana D., Savić, Jasmina Z., Mladenović, Milica R., Erić, Milić D., Marković, Zoran J., Ristić, Mirjana Đ., "Risk Evaluation of Pollutants Emission from Coal and Coal Waste Combustion Plants and Environmental Impact of Fly Ash Landfilling" in Toxics, 11, no. 4 (2023):396,
https://doi.org/10.3390/toxics11040396 . .

TY  - JOUR
AU  - Buha Marković, Jovana Z.
AU  - Marinković, Ana D.
AU  - Savić, Jasmina Z.
AU  - Krstić, Aleksandar D.
AU  - Savić, Andrija B.
AU  - Ristić, Mirjana Đ.
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/7026
AB  - Lignite and coal waste used as feed fuels in thermal power plants
(TPPs) and semi-industrial fluidized bed boiler (FBB), as well as their representative fly ashes (FAs), were examined. Fly ashes were compared employing
anions and cations content in correspondent water extracts, trace elements and
polycyclic aromatic hydrocarbon concentrations, as well as health risk assessments of substances known to be of concern for public health. Fluoride and sulfate contents in water extracted FAs are far below the legislation limits for
waste, classifying all investigated FAs as non-hazardous. Among investigated
trace elements, Cd content is the lowest, while Mn content is the highest. The
highest enrichment ratios are noticed for As, Pb, Hg, Cu, V and Cr. The results
indicate that total PAHs content is elevated in FA from the combustion of coal
waste (AFB), with fluoranthene prevailing. The cancer risk of As and the non-
-cancer risk of As and Ni in some FAs surpass their respective permissible
limits. The incremental lifetime cancer risk of an adult population indicates a
potential PAHs risk in AFB, whereas all other fly ashes are within safe limits.
AB  - U ovom radu, ispitivana su goriva (lignit i otpadni ugalj) koja se koriste u termoelektranama i poluindustrijskom postrojenju sa fluidizovanim slojem, kao i leteći
pepeli dobijeni njihovim sagorevanjem. Leteći pepeli su upoređeni na osnovu: sadržaja anjona i katjona u njihovim vodenim ekstraktima, koncentracije elemenata u
tragovima i policikličnih aromatičnih ugljovodonika (PAH), kao i procene zdravstvenog rizika koji potiče od prethodno pomenutih potencijalno opasnih supstanci.
Sadržaj fluorida i sulfata u vodenim ekstraktima letećih pepela daleko je ispod
zakonski dozvoljenih granica za otpad, na osnovu čega se mogu svrstati u bezopasne. Od
ispitivanih elemenata u tragovima, sadržaj Cd je najniži, dok je koncentracija Mn
najviša. Najveće obogaćenje pepela u odnosu na odgovarajući ugalj, primećeno je za As,
Pb, Hg, Cu, V i Cr. Na osnovu dobijenih rezultata pokazano je da je ukupni sadržaj PAH
najveći za leteći pepeo dobijen sagorevanjem otpadnog uglja. Među ispitivanim PAH,
najvišu koncentraciju ima fluoranten. Rizici koji potiču od arsena (među kancerogenim elementima), kao i arsena i nikla (među nekancerogenim elementima), premašuju dozvoljene granične vrednosti. Vrednost procenjenog rizika od raka kod odrasle
populacije u slučaju PAH, pokazuje da za leteći pepeo dobijen sagorevanjem otpadnog
uglja postoji potencijalni rizik, dok su vrednosti za ostale pepele unutar dozvoljenih
granica.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Health risk assessment of potentially harmful substances from fly ashes generated by coal and coal waste combustion
T1  - Procena rizika za potencijalno opasne supstance iz letećih pepela dobijenih sagorevanjem uglja i otpadnog uglja
EP  - 1173
IS  - 11
SP  - 1161
VL  - 88
DO  - 10.2298/JSC220130048M
ER  - 

@article{
author = "Buha Marković, Jovana Z. and Marinković, Ana D. and Savić, Jasmina Z. and Krstić, Aleksandar D. and Savić, Andrija B. and Ristić, Mirjana Đ.",
year = "2023",
abstract = "Lignite and coal waste used as feed fuels in thermal power plants
(TPPs) and semi-industrial fluidized bed boiler (FBB), as well as their representative fly ashes (FAs), were examined. Fly ashes were compared employing
anions and cations content in correspondent water extracts, trace elements and
polycyclic aromatic hydrocarbon concentrations, as well as health risk assessments of substances known to be of concern for public health. Fluoride and sulfate contents in water extracted FAs are far below the legislation limits for
waste, classifying all investigated FAs as non-hazardous. Among investigated
trace elements, Cd content is the lowest, while Mn content is the highest. The
highest enrichment ratios are noticed for As, Pb, Hg, Cu, V and Cr. The results
indicate that total PAHs content is elevated in FA from the combustion of coal
waste (AFB), with fluoranthene prevailing. The cancer risk of As and the non-
-cancer risk of As and Ni in some FAs surpass their respective permissible
limits. The incremental lifetime cancer risk of an adult population indicates a
potential PAHs risk in AFB, whereas all other fly ashes are within safe limits., U ovom radu, ispitivana su goriva (lignit i otpadni ugalj) koja se koriste u termoelektranama i poluindustrijskom postrojenju sa fluidizovanim slojem, kao i leteći
pepeli dobijeni njihovim sagorevanjem. Leteći pepeli su upoređeni na osnovu: sadržaja anjona i katjona u njihovim vodenim ekstraktima, koncentracije elemenata u
tragovima i policikličnih aromatičnih ugljovodonika (PAH), kao i procene zdravstvenog rizika koji potiče od prethodno pomenutih potencijalno opasnih supstanci.
Sadržaj fluorida i sulfata u vodenim ekstraktima letećih pepela daleko je ispod
zakonski dozvoljenih granica za otpad, na osnovu čega se mogu svrstati u bezopasne. Od
ispitivanih elemenata u tragovima, sadržaj Cd je najniži, dok je koncentracija Mn
najviša. Najveće obogaćenje pepela u odnosu na odgovarajući ugalj, primećeno je za As,
Pb, Hg, Cu, V i Cr. Na osnovu dobijenih rezultata pokazano je da je ukupni sadržaj PAH
najveći za leteći pepeo dobijen sagorevanjem otpadnog uglja. Među ispitivanim PAH,
najvišu koncentraciju ima fluoranten. Rizici koji potiču od arsena (među kancerogenim elementima), kao i arsena i nikla (među nekancerogenim elementima), premašuju dozvoljene granične vrednosti. Vrednost procenjenog rizika od raka kod odrasle
populacije u slučaju PAH, pokazuje da za leteći pepeo dobijen sagorevanjem otpadnog
uglja postoji potencijalni rizik, dok su vrednosti za ostale pepele unutar dozvoljenih
granica.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Health risk assessment of potentially harmful substances from fly ashes generated by coal and coal waste combustion, Procena rizika za potencijalno opasne supstance iz letećih pepela dobijenih sagorevanjem uglja i otpadnog uglja",
pages = "1173-1161",
number = "11",
volume = "88",
doi = "10.2298/JSC220130048M"
}

Buha Marković, J. Z., Marinković, A. D., Savić, J. Z., Krstić, A. D., Savić, A. B.,& Ristić, M. Đ.. (2023). Health risk assessment of potentially harmful substances from fly ashes generated by coal and coal waste combustion. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 88(11), 1161-1173.
https://doi.org/10.2298/JSC220130048M

Buha Marković JZ, Marinković AD, Savić JZ, Krstić AD, Savić AB, Ristić MĐ. Health risk assessment of potentially harmful substances from fly ashes generated by coal and coal waste combustion. in Journal of the Serbian Chemical Society. 2023;88(11):1161-1173.
doi:10.2298/JSC220130048M .

Buha Marković, Jovana Z., Marinković, Ana D., Savić, Jasmina Z., Krstić, Aleksandar D., Savić, Andrija B., Ristić, Mirjana Đ., "Health risk assessment of potentially harmful substances from fly ashes generated by coal and coal waste combustion" in Journal of the Serbian Chemical Society, 88, no. 11 (2023):1161-1173,
https://doi.org/10.2298/JSC220130048M . .

TY  - CONF
AU  - Karić, Nataša
AU  - Vukčević, Marija
AU  - Maletić, Marina
AU  - Ristić, Mirjana
AU  - Trivunac, Katarina
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6063
AB  - Researches in the field of nanotechnology indicate the possibility of the development and application
of bionanocomposites based on clay minerals and biopolymers as promising materials for the removal
of pollutants from contaminated water. Therefore, this study is based on an examination of the effect
of intercalation of starch or cationic starch with kaolin clay or diatomaceous earth on the adsorption
properties of the obtained materials for the removal of anionic and cationic dyes from aqueous
solutions. Structural characterization of the obtained materials was performed by Fourier transform
infrared spectroscopy while the morphology of the samples was determined by Scanning electron
microscopy. The removal efficiency of methyl orange and crystal violet dyes was tested in a batch
system, while the dye concentration after the adsorption process was determined by UV-Vis
spectrophotometry. It was found that modification of cationic starch with clay and diatomaceous earth
improved the efficiency for removing crystal violet dye from an aqueous solution.
PB  - Society of Physical Chemists of Serbia
C3  - PHYSICAL CHEMISTRY 2022, 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry
T1  - The effect of starch modification on the dye adsorption efficiency
EP  - 480
SP  - 477
VL  - 2
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6063
ER  - 

@conference{
author = "Karić, Nataša and Vukčević, Marija and Maletić, Marina and Ristić, Mirjana and Trivunac, Katarina",
year = "2022",
abstract = "Researches in the field of nanotechnology indicate the possibility of the development and application
of bionanocomposites based on clay minerals and biopolymers as promising materials for the removal
of pollutants from contaminated water. Therefore, this study is based on an examination of the effect
of intercalation of starch or cationic starch with kaolin clay or diatomaceous earth on the adsorption
properties of the obtained materials for the removal of anionic and cationic dyes from aqueous
solutions. Structural characterization of the obtained materials was performed by Fourier transform
infrared spectroscopy while the morphology of the samples was determined by Scanning electron
microscopy. The removal efficiency of methyl orange and crystal violet dyes was tested in a batch
system, while the dye concentration after the adsorption process was determined by UV-Vis
spectrophotometry. It was found that modification of cationic starch with clay and diatomaceous earth
improved the efficiency for removing crystal violet dye from an aqueous solution.",
publisher = "Society of Physical Chemists of Serbia",
journal = "PHYSICAL CHEMISTRY 2022, 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry",
title = "The effect of starch modification on the dye adsorption efficiency",
pages = "480-477",
volume = "2",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6063"
}

Karić, N., Vukčević, M., Maletić, M., Ristić, M.,& Trivunac, K.. (2022). The effect of starch modification on the dye adsorption efficiency. in PHYSICAL CHEMISTRY 2022, 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry
Society of Physical Chemists of Serbia., 2, 477-480.
https://hdl.handle.net/21.15107/rcub_technorep_6063

Karić N, Vukčević M, Maletić M, Ristić M, Trivunac K. The effect of starch modification on the dye adsorption efficiency. in PHYSICAL CHEMISTRY 2022, 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry. 2022;2:477-480.
https://hdl.handle.net/21.15107/rcub_technorep_6063 .

Karić, Nataša, Vukčević, Marija, Maletić, Marina, Ristić, Mirjana, Trivunac, Katarina, "The effect of starch modification on the dye adsorption efficiency" in PHYSICAL CHEMISTRY 2022, 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry, 2 (2022):477-480,
https://hdl.handle.net/21.15107/rcub_technorep_6063 .

TY  - CONF
AU  - Karić, Nataša
AU  - Vukčević, Marija
AU  - Maletić, Marina
AU  - Ristić, Mirjana
AU  - Perić-Grujić, Aleksandra
AU  - Trivunac, Katarina
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6066
AB  - The objective of this study was to evaluate the adsorption efficiency of a cationic functionalized wheat starch, obtained with betaine hydrochloride and glycidyl trimethylammonium chloride by an environmentally friendly process without the use of organic solvents. Surface functional groups of samples were characterized by Fourier transform infrared spectroscopy, the morphology of the materials was examined using scanning electron microscopy, the nitrogen content was determined by elemental analysis, while UV-VIS spectroscopy and liquid chromatography-tandem mass spectrometry were used for adsorption investigation. The efficiency of obtained cationic starches to
adsorb the anionic and cationic dyes, as well as selected pharmaceuticals and pesticides was investigated. Adsorption experiments were performed in a batch system to determine the effect of contact time, initial concentration, and pH of the solution on the removal efficiency of crystal violet dye, which was chosen as the model for the detailed study of adsorption. Pseudo-first and pseudosecond order models were used to examine the adsorption kinetic, while Langmuir and Freundlich isotherm models were applied to equilibrium adsorption data. The results showed that environmentally and economically acceptable adsorbents prepared in this study could be effective in removing the examined organic pollutants.
PB  - Faculty of Technology Banja Luka
C3  - XIV Conference of Chemists, Technologists and Environmentalists of Republic of Srpska
T1  - A green adsorbent based on wheat starch for removal of selective organic pollutants from aqueous solutions
EP  - 230
SP  - 225
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6066
ER  - 

@conference{
author = "Karić, Nataša and Vukčević, Marija and Maletić, Marina and Ristić, Mirjana and Perić-Grujić, Aleksandra and Trivunac, Katarina",
year = "2022",
abstract = "The objective of this study was to evaluate the adsorption efficiency of a cationic functionalized wheat starch, obtained with betaine hydrochloride and glycidyl trimethylammonium chloride by an environmentally friendly process without the use of organic solvents. Surface functional groups of samples were characterized by Fourier transform infrared spectroscopy, the morphology of the materials was examined using scanning electron microscopy, the nitrogen content was determined by elemental analysis, while UV-VIS spectroscopy and liquid chromatography-tandem mass spectrometry were used for adsorption investigation. The efficiency of obtained cationic starches to
adsorb the anionic and cationic dyes, as well as selected pharmaceuticals and pesticides was investigated. Adsorption experiments were performed in a batch system to determine the effect of contact time, initial concentration, and pH of the solution on the removal efficiency of crystal violet dye, which was chosen as the model for the detailed study of adsorption. Pseudo-first and pseudosecond order models were used to examine the adsorption kinetic, while Langmuir and Freundlich isotherm models were applied to equilibrium adsorption data. The results showed that environmentally and economically acceptable adsorbents prepared in this study could be effective in removing the examined organic pollutants.",
publisher = "Faculty of Technology Banja Luka",
journal = "XIV Conference of Chemists, Technologists and Environmentalists of Republic of Srpska",
title = "A green adsorbent based on wheat starch for removal of selective organic pollutants from aqueous solutions",
pages = "230-225",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6066"
}

Karić, N., Vukčević, M., Maletić, M., Ristić, M., Perić-Grujić, A.,& Trivunac, K.. (2022). A green adsorbent based on wheat starch for removal of selective organic pollutants from aqueous solutions. in XIV Conference of Chemists, Technologists and Environmentalists of Republic of Srpska
Faculty of Technology Banja Luka., 225-230.
https://hdl.handle.net/21.15107/rcub_technorep_6066

Karić N, Vukčević M, Maletić M, Ristić M, Perić-Grujić A, Trivunac K. A green adsorbent based on wheat starch for removal of selective organic pollutants from aqueous solutions. in XIV Conference of Chemists, Technologists and Environmentalists of Republic of Srpska. 2022;:225-230.
https://hdl.handle.net/21.15107/rcub_technorep_6066 .

Karić, Nataša, Vukčević, Marija, Maletić, Marina, Ristić, Mirjana, Perić-Grujić, Aleksandra, Trivunac, Katarina, "A green adsorbent based on wheat starch for removal of selective organic pollutants from aqueous solutions" in XIV Conference of Chemists, Technologists and Environmentalists of Republic of Srpska (2022):225-230,
https://hdl.handle.net/21.15107/rcub_technorep_6066 .

TY  - CONF
AU  - Karić, Nataša
AU  - Olujić, Jovana
AU  - Maletić, Marina
AU  - Vukčević, Marija
AU  - Trivunac, Katarina
AU  - Ristić, Mirjana
AU  - Perić-Grujić, Aleksandra
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6119
AB  - U cilju dobijanja adsorbenata za uklanjanje organskih boja iz otpadnih voda, u okviru ovog
rada su primenjene dve vrste industrijskih otpadnih materijala. Otpadna prediva pamuka i
mešavine pamuk/poliestar modifikovana su korišćenjem smeše natrijum karboksimetil
celuloze i letećeg pepela. Karakterizacija polaznih i modifikovanih prediva izvršena je
skenirajućom elektronskom mikroskopijom i infracrvenom spektroskopijom sa Furijeovom
transformacijom, dok je adsorpcija metilensko plavog i metil oranža primenjena za
ispitivanje efikasnosti uklanjanja. Svi ispitivani uzorci pokazuju bolju efikasnost u
uklanjanju metilensko plavog, a primenjena modifikacija povećava adsorpcionu efikasnost
skoro dva puta. Pokazano je da se kombinovanjem dve vrste otpada, pamučnog prediva i
letećeg pepela, dobijaju visoko efikasni adsorbenti za uklanjanje metilensko plavog iz
vode.
AB  - In order to obtain adsorbents for the removal of organic dyes from wastewater, two types
of industrial waste materials were used in this study. Waste cotton and cotton/polyester
yarns were modified using a mixture of sodium carboxymethyl cellulose and fly ash.
Characterization of the unmodified and modified yarns was performed by scanning
electron microscopy and infrared spectroscopy with Fourier transform, while the
adsorption of methylene blue and methyl orange was used to examine the removal
efficiency. All tested samples show better efficiency in removing methylene blue, and
applied modification increase the adsorption efficiency almost twice. It has been shown
that by combining waste cotton yarn and fly ash, highly efficient adsorbents for removal of
methylene blue from water can be obtained.
PB  - Srpsko hemijsko društvo
C3  - 58. Savetovanje Srpskog hemijskog društva
T1  - Modifikovana otpadna prediva pamuka i pamuk/poliestra kao adsorbenti za uklanjanje organskih boja iz otpadnih voda
T1  - Modified waste cotton and cotton/polyester yarns as adsorbents for removal of organic dyes from wastewater
EP  - 221
SP  - 218
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6119
ER  - 

@conference{
author = "Karić, Nataša and Olujić, Jovana and Maletić, Marina and Vukčević, Marija and Trivunac, Katarina and Ristić, Mirjana and Perić-Grujić, Aleksandra",
year = "2022",
abstract = "U cilju dobijanja adsorbenata za uklanjanje organskih boja iz otpadnih voda, u okviru ovog
rada su primenjene dve vrste industrijskih otpadnih materijala. Otpadna prediva pamuka i
mešavine pamuk/poliestar modifikovana su korišćenjem smeše natrijum karboksimetil
celuloze i letećeg pepela. Karakterizacija polaznih i modifikovanih prediva izvršena je
skenirajućom elektronskom mikroskopijom i infracrvenom spektroskopijom sa Furijeovom
transformacijom, dok je adsorpcija metilensko plavog i metil oranža primenjena za
ispitivanje efikasnosti uklanjanja. Svi ispitivani uzorci pokazuju bolju efikasnost u
uklanjanju metilensko plavog, a primenjena modifikacija povećava adsorpcionu efikasnost
skoro dva puta. Pokazano je da se kombinovanjem dve vrste otpada, pamučnog prediva i
letećeg pepela, dobijaju visoko efikasni adsorbenti za uklanjanje metilensko plavog iz
vode., In order to obtain adsorbents for the removal of organic dyes from wastewater, two types
of industrial waste materials were used in this study. Waste cotton and cotton/polyester
yarns were modified using a mixture of sodium carboxymethyl cellulose and fly ash.
Characterization of the unmodified and modified yarns was performed by scanning
electron microscopy and infrared spectroscopy with Fourier transform, while the
adsorption of methylene blue and methyl orange was used to examine the removal
efficiency. All tested samples show better efficiency in removing methylene blue, and
applied modification increase the adsorption efficiency almost twice. It has been shown
that by combining waste cotton yarn and fly ash, highly efficient adsorbents for removal of
methylene blue from water can be obtained.",
publisher = "Srpsko hemijsko društvo",
journal = "58. Savetovanje Srpskog hemijskog društva",
title = "Modifikovana otpadna prediva pamuka i pamuk/poliestra kao adsorbenti za uklanjanje organskih boja iz otpadnih voda, Modified waste cotton and cotton/polyester yarns as adsorbents for removal of organic dyes from wastewater",
pages = "221-218",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6119"
}

Karić, N., Olujić, J., Maletić, M., Vukčević, M., Trivunac, K., Ristić, M.,& Perić-Grujić, A.. (2022). Modifikovana otpadna prediva pamuka i pamuk/poliestra kao adsorbenti za uklanjanje organskih boja iz otpadnih voda. in 58. Savetovanje Srpskog hemijskog društva
Srpsko hemijsko društvo., 218-221.
https://hdl.handle.net/21.15107/rcub_technorep_6119

Karić N, Olujić J, Maletić M, Vukčević M, Trivunac K, Ristić M, Perić-Grujić A. Modifikovana otpadna prediva pamuka i pamuk/poliestra kao adsorbenti za uklanjanje organskih boja iz otpadnih voda. in 58. Savetovanje Srpskog hemijskog društva. 2022;:218-221.
https://hdl.handle.net/21.15107/rcub_technorep_6119 .

Karić, Nataša, Olujić, Jovana, Maletić, Marina, Vukčević, Marija, Trivunac, Katarina, Ristić, Mirjana, Perić-Grujić, Aleksandra, "Modifikovana otpadna prediva pamuka i pamuk/poliestra kao adsorbenti za uklanjanje organskih boja iz otpadnih voda" in 58. Savetovanje Srpskog hemijskog društva (2022):218-221,
https://hdl.handle.net/21.15107/rcub_technorep_6119 .

TY  - JOUR
AU  - Đolić, Maja
AU  - Ćujić, Mirjana
AU  - Stanišić, Tijana
AU  - Živojinović, Dragana
AU  - Ristić, Mirjana
AU  - Perić Grujić, Aleksandra
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5518
AB  - The Republic of Serbia generates the majority of its electricity at the thermal power plants (TE) Nikola Tesla, Kolubara, and Kostolac. Coal is extracted from the Kolubara basin, which produces approximately 70% of lignite (an average of 30 million tons per year), and the Kostolac basin, which produces 30% of lignite. Ash, fly ash, and slag are examples of coal combustion residues. Because of the high content of potentially hazardous elements such as As, Pb, Cd, and Cr, environmental pollution with ash and fly ash has been extensively researched. Stable isotopes of lead can be used to trace lead sources. It is possible to monitor the presence, transformation pathways, and environmental impact of Pb by determining its isotopic composition in coal and fly ash. For the first time, the isotopic composition of selected coal samples from the Kolubara and Kostolac mines, as well as fly ash from the Kolubara (A and B), Kostolac (A and B), and Nikola Tesla (TENT A3, A2, B2) thermal power plants, was investigated in this study. The obtained data for 206Pb/207Pb in coal serve as the foundation for ranking domestic coals, whereas the isotopic ratios 206Pb/207Pb and 208Pb/207Pb  in fly ash can be used to monitor and control lead pollution from investigated sources.
PB  - The Netherlands Press
T2  - Metallurgical and Materials Engineering
T1  - Contribution to the Serbian coal ranking and fly ash characterization using Pb isotopic ratio
EP  - 684
IS  - 4
SP  - 675
VL  - 28
DO  - 10.56801/MME931
ER  - 

@article{
author = "Đolić, Maja and Ćujić, Mirjana and Stanišić, Tijana and Živojinović, Dragana and Ristić, Mirjana and Perić Grujić, Aleksandra",
year = "2022",
abstract = "The Republic of Serbia generates the majority of its electricity at the thermal power plants (TE) Nikola Tesla, Kolubara, and Kostolac. Coal is extracted from the Kolubara basin, which produces approximately 70% of lignite (an average of 30 million tons per year), and the Kostolac basin, which produces 30% of lignite. Ash, fly ash, and slag are examples of coal combustion residues. Because of the high content of potentially hazardous elements such as As, Pb, Cd, and Cr, environmental pollution with ash and fly ash has been extensively researched. Stable isotopes of lead can be used to trace lead sources. It is possible to monitor the presence, transformation pathways, and environmental impact of Pb by determining its isotopic composition in coal and fly ash. For the first time, the isotopic composition of selected coal samples from the Kolubara and Kostolac mines, as well as fly ash from the Kolubara (A and B), Kostolac (A and B), and Nikola Tesla (TENT A3, A2, B2) thermal power plants, was investigated in this study. The obtained data for 206Pb/207Pb in coal serve as the foundation for ranking domestic coals, whereas the isotopic ratios 206Pb/207Pb and 208Pb/207Pb  in fly ash can be used to monitor and control lead pollution from investigated sources.",
publisher = "The Netherlands Press",
journal = "Metallurgical and Materials Engineering",
title = "Contribution to the Serbian coal ranking and fly ash characterization using Pb isotopic ratio",
pages = "684-675",
number = "4",
volume = "28",
doi = "10.56801/MME931"
}

Đolić, M., Ćujić, M., Stanišić, T., Živojinović, D., Ristić, M.,& Perić Grujić, A.. (2022). Contribution to the Serbian coal ranking and fly ash characterization using Pb isotopic ratio. in Metallurgical and Materials Engineering
The Netherlands Press., 28(4), 675-684.
https://doi.org/10.56801/MME931

Đolić M, Ćujić M, Stanišić T, Živojinović D, Ristić M, Perić Grujić A. Contribution to the Serbian coal ranking and fly ash characterization using Pb isotopic ratio. in Metallurgical and Materials Engineering. 2022;28(4):675-684.
doi:10.56801/MME931 .

Đolić, Maja, Ćujić, Mirjana, Stanišić, Tijana, Živojinović, Dragana, Ristić, Mirjana, Perić Grujić, Aleksandra, "Contribution to the Serbian coal ranking and fly ash characterization using Pb isotopic ratio" in Metallurgical and Materials Engineering, 28, no. 4 (2022):675-684,
https://doi.org/10.56801/MME931 . .

TY  - CONF
AU  - Stanišić, Tijana
AU  - Đolić, Maja
AU  - Ristić, Mirjana
AU  - Perić Grujić, Aleksandra
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6051
AB  - In this study, the adsorption capacity and removal efficiency of lead using various metal-oxide materials from aqueous solution have been analyzed. Two SiO2-based materials, natural (loam) and synthesized (metal-oxide heterostructures – MOH) were investigated. The characterization of these samples was performed using X-ray powder diffraction (XRD) and Fourier-transform infrared spectroscopy (FTIR). Adsorption tests were performed in a batch system by varying the mass of tested materials. The highest adsorption capacity for Pb2+ was achieved using 5 mg of MOH (166.6 µg g-1), while the removal efficiency using the optimal mass (10 mg) of MOH and loam was 99.3 and 94.2 %, respectively. Based on the obtained results, it was concluded that the synthetic material has higher adsorption capacity and removal efficiency than the natural material for the selected ion.
PB  - Society of Physical Chemists of Serbia
C3  - PHYSICAL CHEMISTRY 2022, 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry (Proceedings)
T1  - COMPARATIVE ANALYSIS OF Pb2+ SEPARATION USING NATURAL AND SYNTHETIC SILICATE MATERIALS
EP  - 468
SP  - 465
VL  - II
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6051
ER  - 

@conference{
author = "Stanišić, Tijana and Đolić, Maja and Ristić, Mirjana and Perić Grujić, Aleksandra",
year = "2022",
abstract = "In this study, the adsorption capacity and removal efficiency of lead using various metal-oxide materials from aqueous solution have been analyzed. Two SiO2-based materials, natural (loam) and synthesized (metal-oxide heterostructures – MOH) were investigated. The characterization of these samples was performed using X-ray powder diffraction (XRD) and Fourier-transform infrared spectroscopy (FTIR). Adsorption tests were performed in a batch system by varying the mass of tested materials. The highest adsorption capacity for Pb2+ was achieved using 5 mg of MOH (166.6 µg g-1), while the removal efficiency using the optimal mass (10 mg) of MOH and loam was 99.3 and 94.2 %, respectively. Based on the obtained results, it was concluded that the synthetic material has higher adsorption capacity and removal efficiency than the natural material for the selected ion.",
publisher = "Society of Physical Chemists of Serbia",
journal = "PHYSICAL CHEMISTRY 2022, 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry (Proceedings)",
title = "COMPARATIVE ANALYSIS OF Pb2+ SEPARATION USING NATURAL AND SYNTHETIC SILICATE MATERIALS",
pages = "468-465",
volume = "II",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6051"
}

Stanišić, T., Đolić, M., Ristić, M.,& Perić Grujić, A.. (2022). COMPARATIVE ANALYSIS OF Pb2+ SEPARATION USING NATURAL AND SYNTHETIC SILICATE MATERIALS. in PHYSICAL CHEMISTRY 2022, 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry (Proceedings)
Society of Physical Chemists of Serbia., II, 465-468.
https://hdl.handle.net/21.15107/rcub_technorep_6051

Stanišić T, Đolić M, Ristić M, Perić Grujić A. COMPARATIVE ANALYSIS OF Pb2+ SEPARATION USING NATURAL AND SYNTHETIC SILICATE MATERIALS. in PHYSICAL CHEMISTRY 2022, 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry (Proceedings). 2022;II:465-468.
https://hdl.handle.net/21.15107/rcub_technorep_6051 .

Stanišić, Tijana, Đolić, Maja, Ristić, Mirjana, Perić Grujić, Aleksandra, "COMPARATIVE ANALYSIS OF Pb2+ SEPARATION USING NATURAL AND SYNTHETIC SILICATE MATERIALS" in PHYSICAL CHEMISTRY 2022, 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry (Proceedings), II (2022):465-468,
https://hdl.handle.net/21.15107/rcub_technorep_6051 .

TY  - JOUR
AU  - Stanišić, Tijana
AU  - Đolić, Maja
AU  - Ćujić, Mirjana
AU  - Ristić, Mirjana
AU  - Perić Grujić, Aleksandra
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6057
AB  - This study investigated the use of different natural raw soil materials as low-cost adsorbents for
the removal to remove As(V) and Pb(II) from aqueous systems. It deals with the effect of different soil textures, sandy loam, loam, and loamy sand, on adsorption efficiency. Fourier-transform
infrared spectroscopy (FTIR) was used to carry out the comprehensive characterization of
materials, as well as scanning electron microscopy (SEM), X-ray diffraction (XRD), and liquid
nitrogen porosimetry or the Brunauer–Emmett–Teller (BET). Studies were performed in a batch
system; the initial concentration of examined heavy metals was 100 μg·L–1, pH varied in the range
of 4–6, and the adsorbent dosage was 5–20 mg/10 mL. Sandy loam was the most efficient adsorbent for As(V) separation, with a maximum removal efficiency of 47.5%, while the loam was the
most efficient for Pb(II) separation, with a maximum removal efficiency of 94.2%. The removal
efficiency was affected mainly by the adsorbent characteristics. Performed kinetic studies revealed
two steps of adsorption for both investigated ions. Obtained results indicate that natural sorbents
used in this work present environmentally sustainable material for As(V) and Pb(II) removal,
on the one hand, and the basis for further studies on the simultaneous removal of heavy metals
from water and their reduced mobility in soil, on the other.
PB  - Desalination Publications
T2  - Desalination and Water Treatment
T1  - Disparate soil textures as a native medium for As(V) and Pb(II) separation from aqueous systems
EP  - 202
IS  - 190
VL  - 273
DO  - 10.5004/dwt.2022.28889
ER  - 

@article{
author = "Stanišić, Tijana and Đolić, Maja and Ćujić, Mirjana and Ristić, Mirjana and Perić Grujić, Aleksandra",
year = "2022",
abstract = "This study investigated the use of different natural raw soil materials as low-cost adsorbents for
the removal to remove As(V) and Pb(II) from aqueous systems. It deals with the effect of different soil textures, sandy loam, loam, and loamy sand, on adsorption efficiency. Fourier-transform
infrared spectroscopy (FTIR) was used to carry out the comprehensive characterization of
materials, as well as scanning electron microscopy (SEM), X-ray diffraction (XRD), and liquid
nitrogen porosimetry or the Brunauer–Emmett–Teller (BET). Studies were performed in a batch
system; the initial concentration of examined heavy metals was 100 μg·L–1, pH varied in the range
of 4–6, and the adsorbent dosage was 5–20 mg/10 mL. Sandy loam was the most efficient adsorbent for As(V) separation, with a maximum removal efficiency of 47.5%, while the loam was the
most efficient for Pb(II) separation, with a maximum removal efficiency of 94.2%. The removal
efficiency was affected mainly by the adsorbent characteristics. Performed kinetic studies revealed
two steps of adsorption for both investigated ions. Obtained results indicate that natural sorbents
used in this work present environmentally sustainable material for As(V) and Pb(II) removal,
on the one hand, and the basis for further studies on the simultaneous removal of heavy metals
from water and their reduced mobility in soil, on the other.",
publisher = "Desalination Publications",
journal = "Desalination and Water Treatment",
title = "Disparate soil textures as a native medium for As(V) and Pb(II) separation from aqueous systems",
pages = "202",
number = "190",
volume = "273",
doi = "10.5004/dwt.2022.28889"
}

Stanišić, T., Đolić, M., Ćujić, M., Ristić, M.,& Perić Grujić, A.. (2022). Disparate soil textures as a native medium for As(V) and Pb(II) separation from aqueous systems. in Desalination and Water Treatment
Desalination Publications., 273(190).
https://doi.org/10.5004/dwt.2022.28889

Stanišić T, Đolić M, Ćujić M, Ristić M, Perić Grujić A. Disparate soil textures as a native medium for As(V) and Pb(II) separation from aqueous systems. in Desalination and Water Treatment. 2022;273(190):null-202.
doi:10.5004/dwt.2022.28889 .

Stanišić, Tijana, Đolić, Maja, Ćujić, Mirjana, Ristić, Mirjana, Perić Grujić, Aleksandra, "Disparate soil textures as a native medium for As(V) and Pb(II) separation from aqueous systems" in Desalination and Water Treatment, 273, no. 190 (2022),
https://doi.org/10.5004/dwt.2022.28889 . .

TY  - JOUR
AU  - Mihajlovic, Snezana
AU  - Vukčević, Marija
AU  - Pejic, Biljana
AU  - Perić-Grujić, Aleksandra
AU  - Ristić, Mirjana
AU  - Trivunac, Katarina
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4991
AB  - The possibility of using waste cotton and cotton/polyester yarns to remove lead and chromium ions from polluted water was investigated in this work. Structural, morphological, and adsorption properties of yarns were determined by iodine sorption, water retention scanning electron microscopy, Fourier transform infrared spectroscopy, and streaming potential method for determination of an isoelectric point. It was found that the presence of polyester component negatively affects adsorption capacity, through the reduced porosity of cotton/polyester yarn surface, increased surface, and structural crystallinity. Relatively fast adsorption of lead and chromium ions from binary mixture onto cotton and cotton/polyester yarns follows the pseudo-second order kinetic, while equilibrium data fitted better with the Langmuir isotherm model, with maximal adsorption capacity from 259.0 to 824.7 mu g/g. Although, cotton yarn shows slightly higher maximal adsorption capacities, both cotton and cotton/polyester yarns can be utilized as cheap and highly efficient adsorbents for removal of lead and chromium ions from water.
T2  - Journal of Natural Fibers
T1  - Waste Cotton and Cotton/Polyester Yarns as Adsorbents for Removal of Lead and Chromium from Wastewater
EP  - 9873
IS  - 15
SP  - 9860
VL  - 19
DO  - 10.1080/15440478.2021.1993414
ER  - 

@article{
author = "Mihajlovic, Snezana and Vukčević, Marija and Pejic, Biljana and Perić-Grujić, Aleksandra and Ristić, Mirjana and Trivunac, Katarina",
year = "2022",
abstract = "The possibility of using waste cotton and cotton/polyester yarns to remove lead and chromium ions from polluted water was investigated in this work. Structural, morphological, and adsorption properties of yarns were determined by iodine sorption, water retention scanning electron microscopy, Fourier transform infrared spectroscopy, and streaming potential method for determination of an isoelectric point. It was found that the presence of polyester component negatively affects adsorption capacity, through the reduced porosity of cotton/polyester yarn surface, increased surface, and structural crystallinity. Relatively fast adsorption of lead and chromium ions from binary mixture onto cotton and cotton/polyester yarns follows the pseudo-second order kinetic, while equilibrium data fitted better with the Langmuir isotherm model, with maximal adsorption capacity from 259.0 to 824.7 mu g/g. Although, cotton yarn shows slightly higher maximal adsorption capacities, both cotton and cotton/polyester yarns can be utilized as cheap and highly efficient adsorbents for removal of lead and chromium ions from water.",
journal = "Journal of Natural Fibers",
title = "Waste Cotton and Cotton/Polyester Yarns as Adsorbents for Removal of Lead and Chromium from Wastewater",
pages = "9873-9860",
number = "15",
volume = "19",
doi = "10.1080/15440478.2021.1993414"
}

Mihajlovic, S., Vukčević, M., Pejic, B., Perić-Grujić, A., Ristić, M.,& Trivunac, K.. (2022). Waste Cotton and Cotton/Polyester Yarns as Adsorbents for Removal of Lead and Chromium from Wastewater. in Journal of Natural Fibers, 19(15), 9860-9873.
https://doi.org/10.1080/15440478.2021.1993414

Mihajlovic S, Vukčević M, Pejic B, Perić-Grujić A, Ristić M, Trivunac K. Waste Cotton and Cotton/Polyester Yarns as Adsorbents for Removal of Lead and Chromium from Wastewater. in Journal of Natural Fibers. 2022;19(15):9860-9873.
doi:10.1080/15440478.2021.1993414 .

Mihajlovic, Snezana, Vukčević, Marija, Pejic, Biljana, Perić-Grujić, Aleksandra, Ristić, Mirjana, Trivunac, Katarina, "Waste Cotton and Cotton/Polyester Yarns as Adsorbents for Removal of Lead and Chromium from Wastewater" in Journal of Natural Fibers, 19, no. 15 (2022):9860-9873,
https://doi.org/10.1080/15440478.2021.1993414 . .

TY  - CONF
AU  - Maletić, Marina
AU  - Lazović, Anđela
AU  - Karić, Nataša
AU  - Vukčević, Marija
AU  - Trivunac, Katarina
AU  - Ristić, Mirjana
AU  - Perić-Grujić, Aleksandra
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6059
AB  - Using two types of industrial waste materials (yarns and fly ash), adsorbents for removing heavy
metal ions from water were obtained. To improve the adsorption efficiency of cotton and cottonpolyester yarns, modification using fly ash and sodium alginate as a binder, was applied.
Characterization of materials was performed by Scanning electron microscopy and Fourier transform
infrared spectroscopy, while the concentration of lead and cadmium ions was determined using
atomic absorption spectroscopy. The modification of the material has contributed to an increase in
the adsorption efficiency of lead and cadmium by up to twice in comparis onto the unmodified
materials. It was found that the kinetics of the metal adsorption process can be better described by a
second-order pseudo model. The results showed that by combining two types of industrial waste,
cotton and cotton/polyester yarns and fly ash, highly efficient adsorbents for removing lead and
cadmium from aqueous solutions are obtained.
PB  - Society of Physical Chemists of Serbia
C3  - PHYSICAL CHEMISTRY 2022, 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry
T1  - Fly ash modified waste cotton and cotton-polyester yarns for removal of heavy metals from water
EP  - 472
SP  - 469
VL  - 2
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6059
ER  - 

@conference{
author = "Maletić, Marina and Lazović, Anđela and Karić, Nataša and Vukčević, Marija and Trivunac, Katarina and Ristić, Mirjana and Perić-Grujić, Aleksandra",
year = "2022",
abstract = "Using two types of industrial waste materials (yarns and fly ash), adsorbents for removing heavy
metal ions from water were obtained. To improve the adsorption efficiency of cotton and cottonpolyester yarns, modification using fly ash and sodium alginate as a binder, was applied.
Characterization of materials was performed by Scanning electron microscopy and Fourier transform
infrared spectroscopy, while the concentration of lead and cadmium ions was determined using
atomic absorption spectroscopy. The modification of the material has contributed to an increase in
the adsorption efficiency of lead and cadmium by up to twice in comparis onto the unmodified
materials. It was found that the kinetics of the metal adsorption process can be better described by a
second-order pseudo model. The results showed that by combining two types of industrial waste,
cotton and cotton/polyester yarns and fly ash, highly efficient adsorbents for removing lead and
cadmium from aqueous solutions are obtained.",
publisher = "Society of Physical Chemists of Serbia",
journal = "PHYSICAL CHEMISTRY 2022, 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry",
title = "Fly ash modified waste cotton and cotton-polyester yarns for removal of heavy metals from water",
pages = "472-469",
volume = "2",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6059"
}

Maletić, M., Lazović, A., Karić, N., Vukčević, M., Trivunac, K., Ristić, M.,& Perić-Grujić, A.. (2022). Fly ash modified waste cotton and cotton-polyester yarns for removal of heavy metals from water. in PHYSICAL CHEMISTRY 2022, 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry
Society of Physical Chemists of Serbia., 2, 469-472.
https://hdl.handle.net/21.15107/rcub_technorep_6059

Maletić M, Lazović A, Karić N, Vukčević M, Trivunac K, Ristić M, Perić-Grujić A. Fly ash modified waste cotton and cotton-polyester yarns for removal of heavy metals from water. in PHYSICAL CHEMISTRY 2022, 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry. 2022;2:469-472.
https://hdl.handle.net/21.15107/rcub_technorep_6059 .

Maletić, Marina, Lazović, Anđela, Karić, Nataša, Vukčević, Marija, Trivunac, Katarina, Ristić, Mirjana, Perić-Grujić, Aleksandra, "Fly ash modified waste cotton and cotton-polyester yarns for removal of heavy metals from water" in PHYSICAL CHEMISTRY 2022, 16th International Conference on Fundamental and Applied Aspects of Physical Chemistry, 2 (2022):469-472,
https://hdl.handle.net/21.15107/rcub_technorep_6059 .

TY  - CONF
AU  - Karić, Nataša
AU  - Stanišić, Tijana
AU  - Đolić, Maja
AU  - Vukčević, Marija
AU  - Ristić, Mirjana
AU  - Perić-Grujić, Aleksandra
AU  - Marinković, Aleksandar
AU  - Trivunac, Katarina
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6083
AB  - Cilj rada bio je razvijanje jednostavnog i ekološki prihvatljivog načina pripreme katjonski modifikovanog skroba sa katjonskim reagensima, glicidiltrimetilamonijum hloridom (GTMAH) i betain
hidrohloridom (BHH), bez upotrebe organskih rastvarača. Takođe, proučavani su i uslovi reakcije
kao što su reakciona temperatura, koncentracija katjonskih reagenasa, prisustvo i koncentracija katalizatora i prirodnog plastifikatora u strukturi materijala. Strukturna karakterizacija katjonskih
skrobova izvršena je upotrebom Furijeove infracrvene (FTIR) spektroskopije i skenirajuće elektronske mikroskopije (SEM). Svojstva materijala kao što su stepen katjonizacije, viskoznost, kapacitet
bubrenja i rastvorljivost određena su prema standardnim metodama. Stepen katjonizacije pripremljenih katjonskih skrobova varirao je od 0,048-0,162 mmol g-1 za uzorke sa GTMAH i od 0,032-0,156
mmol g-1 za uzorke sa BHH. FTIR i SEM karakterizacija potvrdila je da je ugradnja katjonskog dela
u strukturu skroba bila uspešna.
AB  - In this study, a simple and eco-efficient way to prepare cationized modified starch with cationic
reactants, such as glycidyltrimethylammonium chloride (GTMAC) and betaine hydrochloride (BHC),
without using an organic solvents was developed. The processing conditions such as reaction temperature, concentration of cationic reagents, presence and concentration of catalyst and natural plasticizer within the material structure were also studied. The structure of cationic starch derivatives was
characterized by using Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM). The properties of materials such as cationic degree, viscosity, swelling capacity,
solubility and moisture content were determined according to standard methods. The degree of cationization of the prepared cationic starches varied from 0.048 to 0.162 mmol g-1for samples with
GTMAC and from 0.032 to 0.156 mmol g-1for samples with BHC. The FTIR and SEM characterization showed that incorporation of a cationic moiety onto the backbone of the starch was successful.
PB  - Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS), Društvo za procesnu tehniku
C3  - 34. Međunarodni kongres o procesnoj industriji - Procesing '21
T1  - Sinteza i karakterizacija katjonskog skroba za primenu u tretmanu otpadnih voda
T1  - Synthesis and characterization of cationic starch for application in the wastewater treatment
EP  - 54
SP  - 49
DO  - 10.24094/ptk.021.34.1.49
ER  - 

@conference{
author = "Karić, Nataša and Stanišić, Tijana and Đolić, Maja and Vukčević, Marija and Ristić, Mirjana and Perić-Grujić, Aleksandra and Marinković, Aleksandar and Trivunac, Katarina",
year = "2021",
abstract = "Cilj rada bio je razvijanje jednostavnog i ekološki prihvatljivog načina pripreme katjonski modifikovanog skroba sa katjonskim reagensima, glicidiltrimetilamonijum hloridom (GTMAH) i betain
hidrohloridom (BHH), bez upotrebe organskih rastvarača. Takođe, proučavani su i uslovi reakcije
kao što su reakciona temperatura, koncentracija katjonskih reagenasa, prisustvo i koncentracija katalizatora i prirodnog plastifikatora u strukturi materijala. Strukturna karakterizacija katjonskih
skrobova izvršena je upotrebom Furijeove infracrvene (FTIR) spektroskopije i skenirajuće elektronske mikroskopije (SEM). Svojstva materijala kao što su stepen katjonizacije, viskoznost, kapacitet
bubrenja i rastvorljivost određena su prema standardnim metodama. Stepen katjonizacije pripremljenih katjonskih skrobova varirao je od 0,048-0,162 mmol g-1 za uzorke sa GTMAH i od 0,032-0,156
mmol g-1 za uzorke sa BHH. FTIR i SEM karakterizacija potvrdila je da je ugradnja katjonskog dela
u strukturu skroba bila uspešna., In this study, a simple and eco-efficient way to prepare cationized modified starch with cationic
reactants, such as glycidyltrimethylammonium chloride (GTMAC) and betaine hydrochloride (BHC),
without using an organic solvents was developed. The processing conditions such as reaction temperature, concentration of cationic reagents, presence and concentration of catalyst and natural plasticizer within the material structure were also studied. The structure of cationic starch derivatives was
characterized by using Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM). The properties of materials such as cationic degree, viscosity, swelling capacity,
solubility and moisture content were determined according to standard methods. The degree of cationization of the prepared cationic starches varied from 0.048 to 0.162 mmol g-1for samples with
GTMAC and from 0.032 to 0.156 mmol g-1for samples with BHC. The FTIR and SEM characterization showed that incorporation of a cationic moiety onto the backbone of the starch was successful.",
publisher = "Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS), Društvo za procesnu tehniku",
journal = "34. Međunarodni kongres o procesnoj industriji - Procesing '21",
title = "Sinteza i karakterizacija katjonskog skroba za primenu u tretmanu otpadnih voda, Synthesis and characterization of cationic starch for application in the wastewater treatment",
pages = "54-49",
doi = "10.24094/ptk.021.34.1.49"
}

Karić, N., Stanišić, T., Đolić, M., Vukčević, M., Ristić, M., Perić-Grujić, A., Marinković, A.,& Trivunac, K.. (2021). Sinteza i karakterizacija katjonskog skroba za primenu u tretmanu otpadnih voda. in 34. Međunarodni kongres o procesnoj industriji - Procesing '21
Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS), Društvo za procesnu tehniku., 49-54.
https://doi.org/10.24094/ptk.021.34.1.49

Karić N, Stanišić T, Đolić M, Vukčević M, Ristić M, Perić-Grujić A, Marinković A, Trivunac K. Sinteza i karakterizacija katjonskog skroba za primenu u tretmanu otpadnih voda. in 34. Međunarodni kongres o procesnoj industriji - Procesing '21. 2021;:49-54.
doi:10.24094/ptk.021.34.1.49 .

Karić, Nataša, Stanišić, Tijana, Đolić, Maja, Vukčević, Marija, Ristić, Mirjana, Perić-Grujić, Aleksandra, Marinković, Aleksandar, Trivunac, Katarina, "Sinteza i karakterizacija katjonskog skroba za primenu u tretmanu otpadnih voda" in 34. Međunarodni kongres o procesnoj industriji - Procesing '21 (2021):49-54,
https://doi.org/10.24094/ptk.021.34.1.49 . .

TY  - CONF
AU  - Mihajlović, Snežana
AU  - Maletić, Marina
AU  - Pejić, Biljana
AU  - Ristić, Mirjana
AU  - Perić-Grujić, Aleksandra
AU  - Trivunac, Katarina
AU  - Vukčević, Marija
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6306
AB  - U ovom radu je ispitana mogućnost korišćenja otpadnih pamučnih pređa kao adsorbenta
za uklanjanje olova i hroma iz vode, čime bi se obezbedilo ponovno korišćenje tekstilnog otpada i
smanjenje troškova njegovog odlaganja. Karakterizacija pamučne pređe (CY) i mešavine
pamuk/poliestar (CY/PES) izvršena je skenirajućom elektronskom mikroskopijom, infracrvenom
spektroskopijom sa Furijeovom transformacijom, ispitivanjem sorpcije joda i zadržavanja vode,
kao i određivanjem izoelektrične tačke. Dobijeni rezultati su pokazali da prisustvo poliestarske
komponente u strukturi CY/PES dovodi do smanjenja poroznosti površine pređe, kao i do povećanja
površinske i strukturne kristaličnosti. Ove promene u strukturnim i površinskim karakteristikama
imaju za posledicu nešto niži adsorpcioni kapacitet pređe CY/PES u poređenju sa pamučnom
pređom. Obe pređe, CY i CY/PES, pokazuju relativno brzu adsorpciju jona olova i hroma, koja
prati zakon kinetike pseudo-drugog reda, dok se ravnotežni adsorpcioni podaci mogu opisati
modelom Lengmirove izoterme. Pokazano je da se obe ispitane pređe mogu primeniti kao jeftini
adsorbenti za efikasno uklanjanje jona olova i hroma iz vode, istovremeno zadovoljavajući zahteve
čistije životne sredine i cirkularne ekonomije.
PB  - Akademija tehničkih strukovnih studija Beograd
C3  - Šesti naučno-stručni skup Politehnika, Zbornik radova
T1  - Uklanjanje hroma i olova iz vode korišćenjem otpadnih pređa pamuka i mešavine pamuka i poliestra
EP  - 123
SP  - 118
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6306
ER  - 

@conference{
author = "Mihajlović, Snežana and Maletić, Marina and Pejić, Biljana and Ristić, Mirjana and Perić-Grujić, Aleksandra and Trivunac, Katarina and Vukčević, Marija",
year = "2021",
abstract = "U ovom radu je ispitana mogućnost korišćenja otpadnih pamučnih pređa kao adsorbenta
za uklanjanje olova i hroma iz vode, čime bi se obezbedilo ponovno korišćenje tekstilnog otpada i
smanjenje troškova njegovog odlaganja. Karakterizacija pamučne pređe (CY) i mešavine
pamuk/poliestar (CY/PES) izvršena je skenirajućom elektronskom mikroskopijom, infracrvenom
spektroskopijom sa Furijeovom transformacijom, ispitivanjem sorpcije joda i zadržavanja vode,
kao i određivanjem izoelektrične tačke. Dobijeni rezultati su pokazali da prisustvo poliestarske
komponente u strukturi CY/PES dovodi do smanjenja poroznosti površine pređe, kao i do povećanja
površinske i strukturne kristaličnosti. Ove promene u strukturnim i površinskim karakteristikama
imaju za posledicu nešto niži adsorpcioni kapacitet pređe CY/PES u poređenju sa pamučnom
pređom. Obe pređe, CY i CY/PES, pokazuju relativno brzu adsorpciju jona olova i hroma, koja
prati zakon kinetike pseudo-drugog reda, dok se ravnotežni adsorpcioni podaci mogu opisati
modelom Lengmirove izoterme. Pokazano je da se obe ispitane pređe mogu primeniti kao jeftini
adsorbenti za efikasno uklanjanje jona olova i hroma iz vode, istovremeno zadovoljavajući zahteve
čistije životne sredine i cirkularne ekonomije.",
publisher = "Akademija tehničkih strukovnih studija Beograd",
journal = "Šesti naučno-stručni skup Politehnika, Zbornik radova",
title = "Uklanjanje hroma i olova iz vode korišćenjem otpadnih pređa pamuka i mešavine pamuka i poliestra",
pages = "123-118",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6306"
}

Mihajlović, S., Maletić, M., Pejić, B., Ristić, M., Perić-Grujić, A., Trivunac, K.,& Vukčević, M.. (2021). Uklanjanje hroma i olova iz vode korišćenjem otpadnih pređa pamuka i mešavine pamuka i poliestra. in Šesti naučno-stručni skup Politehnika, Zbornik radova
Akademija tehničkih strukovnih studija Beograd., 118-123.
https://hdl.handle.net/21.15107/rcub_technorep_6306

Mihajlović S, Maletić M, Pejić B, Ristić M, Perić-Grujić A, Trivunac K, Vukčević M. Uklanjanje hroma i olova iz vode korišćenjem otpadnih pređa pamuka i mešavine pamuka i poliestra. in Šesti naučno-stručni skup Politehnika, Zbornik radova. 2021;:118-123.
https://hdl.handle.net/21.15107/rcub_technorep_6306 .

Mihajlović, Snežana, Maletić, Marina, Pejić, Biljana, Ristić, Mirjana, Perić-Grujić, Aleksandra, Trivunac, Katarina, Vukčević, Marija, "Uklanjanje hroma i olova iz vode korišćenjem otpadnih pređa pamuka i mešavine pamuka i poliestra" in Šesti naučno-stručni skup Politehnika, Zbornik radova (2021):118-123,
https://hdl.handle.net/21.15107/rcub_technorep_6306 .

TY  - CONF
AU  - Mihajlović, Snežana
AU  - Vukčević, Marija
AU  - Maletić, Marina
AU  - Pejić, Biljana
AU  - Perić-Grujić, Aleksandra
AU  - Ristić, Mirjana
AU  - Trivunac, Katarina
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6330
AB  - Waste cotton/polyester yarn was used for the removal of Pb(II), Cd(II), Cr(III) and As(V) ions from aqueous solution. In attempt to increase the adsorption efficiency, cotton/polyester yarn was modified by sodium hydroxide solution. Characterization of examined yarns was performed by scanning electron microscopy, Fourier transform infrared spectroscopy and streaming potential method for determination of the isoelectric point. It was shown that applied treatments slightly affected the surface acidity due to increased availability of ester groups and changes in cellulose-derived groups. These changes in surface chemistry of modified cotton/polyester yarns did not improve their adsorption capacity for Cd(II), Cr(III) and As(V) ions. However, both unmodified and modified waste cotton/polyester yarns could be used for efficient removal of lead ions from wastewater.
PB  - Society of Physical Chemists of Serbia
C3  - 15th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Proceedings
T1  - Waste cotton polyester yarn as an adsorbent for the removal of heavy metals from wastewater
EP  - 631
SP  - 628
VL  - 2
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6330
ER  - 

@conference{
author = "Mihajlović, Snežana and Vukčević, Marija and Maletić, Marina and Pejić, Biljana and Perić-Grujić, Aleksandra and Ristić, Mirjana and Trivunac, Katarina",
year = "2021",
abstract = "Waste cotton/polyester yarn was used for the removal of Pb(II), Cd(II), Cr(III) and As(V) ions from aqueous solution. In attempt to increase the adsorption efficiency, cotton/polyester yarn was modified by sodium hydroxide solution. Characterization of examined yarns was performed by scanning electron microscopy, Fourier transform infrared spectroscopy and streaming potential method for determination of the isoelectric point. It was shown that applied treatments slightly affected the surface acidity due to increased availability of ester groups and changes in cellulose-derived groups. These changes in surface chemistry of modified cotton/polyester yarns did not improve their adsorption capacity for Cd(II), Cr(III) and As(V) ions. However, both unmodified and modified waste cotton/polyester yarns could be used for efficient removal of lead ions from wastewater.",
publisher = "Society of Physical Chemists of Serbia",
journal = "15th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Proceedings",
title = "Waste cotton polyester yarn as an adsorbent for the removal of heavy metals from wastewater",
pages = "631-628",
volume = "2",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6330"
}

Mihajlović, S., Vukčević, M., Maletić, M., Pejić, B., Perić-Grujić, A., Ristić, M.,& Trivunac, K.. (2021). Waste cotton polyester yarn as an adsorbent for the removal of heavy metals from wastewater. in 15th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Proceedings
Society of Physical Chemists of Serbia., 2, 628-631.
https://hdl.handle.net/21.15107/rcub_technorep_6330

Mihajlović S, Vukčević M, Maletić M, Pejić B, Perić-Grujić A, Ristić M, Trivunac K. Waste cotton polyester yarn as an adsorbent for the removal of heavy metals from wastewater. in 15th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Proceedings. 2021;2:628-631.
https://hdl.handle.net/21.15107/rcub_technorep_6330 .

Mihajlović, Snežana, Vukčević, Marija, Maletić, Marina, Pejić, Biljana, Perić-Grujić, Aleksandra, Ristić, Mirjana, Trivunac, Katarina, "Waste cotton polyester yarn as an adsorbent for the removal of heavy metals from wastewater" in 15th International Conference on Fundamental and Applied Aspects of Physical Chemistry, Proceedings, 2 (2021):628-631,
https://hdl.handle.net/21.15107/rcub_technorep_6330 .

TY  - CONF
AU  - Karić, Nataša
AU  - Maletić, Marina
AU  - Rnjaković, Danka
AU  - Vukčević, Marija
AU  - Perić-Grujić, Aleksandra
AU  - Ristić, Mirjana
AU  - Trivunac, Katarina
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6117
AB  - Tekstilna industrija spada u red industrija sa najvećom potrošnjom vode u svom
proizvodnom procesu. Opšta karakteristika otpadnih voda iz tekstilne industrije je, pre svega, visok
sadržaj organskih materija i visoka obojenost. Sa aspekta zaštite životne sredine, uslovi za
ispuštanje otpadnih voda su sve strožiji, dok je primena ekološki i ekonomski prihvatljivih
adsorbenata za tretman otpadnih voda veliki izazov današnjice. Upravo zbog toga, u okviru ovog
rada ispitivana je mogućnost primene katjonskih adsorbenata na bazi prirodnog materijala skroba
za uklanjanje metil oranž (MO) boje iz vodenih rastvora. Korišćena su dva derivata katjonskog
skroba, skrob modifikovan sa glicidiltrimetilamonijum hloridom (CS-G) i skrob modifikovan sa
betain hidrohloridom (CS-B). Karakterizacija funkcionalnih grupa na površini materijala izvršena
je korišćenjem infracrvene spektroskopije sa Furijeovom transformacijom (FTIR), dok je
morfologija materijala ispitana pomoću skenirajuće elektronske mikroskopije (SEM). Kako bi se
utvrdili optimalni adsorpcioni uslovi ispitana je kinetika adsorpcije, adsorpcione izoterme, kao i
uticaj pH vrednosti. Na osnovu dobijenih kapaciteta adsorpcije pri optimalnim uslovima, određene
su efikasnosti uklanjanja MO iz vodenih medijuma. Takođe, ispitana je i adsorpcija drugih
anjonskih i katjonskih boja. Ispitivani katjonski skrobovi su se pokazali kao efikasni adsorbenti za
uklanjanje MO i drugih anjonskih (alizarin crveno S, ARS), ali i katjonskih (metilensko plavo, MB i
brilijant zelena, BG) boja iz vodenih rastvora.
AB  - The textile industry is one of the industries with the highest water consumption in its
production process. The general characteristic of wastewater from the textile industry is, primarily,
the high content of organic matters and high coloration. From the aspect of environmental
protection, the conditions for wastewater discharge are becoming more stringent, while the
application of environmentally and economically acceptable adsorbents for wastewater treatment is
a great challenge today. For this reason, the possibility of using cationic adsorbents based on natural starch material to remove methyl orange (MO) from aqueous solutions was investigated.
Two cationic starch derivatives were used, starch modified with glycidyltrimethylammonium
chloride (CS-G) and starch modified with betaine hydrochloride (CS-B). Surface functional groups
were characterized by Fourier transform infrared spectroscopy (FTIR), while the morphology of
the material was examined using scanning electron microscopy (SEM). In order to determine the
optimal reaction conditions, the kinetics of adsorption, adsorption isotherms, as well as the
influence of pH values were examined. Based on the obtained adsorption capacities under optimal
conditions, the efficiencies of MO removal from aqueous media were determined. The adsorption of
other anionic and cationic dyes was also investigated. The tested cationic starches proved to be
effective adsorbents for the removal of MO and other anionic (alizarin red S, ARS), but also
cationic (methylene blue, MB and brilliant green, BG) dyes from aqueous solutions.
PB  - AKADEMIJA TEHNIČKIH STRUKOVNIH STUDIJA BEOGRAD
C3  - Šesti naučno-stručni skup Politehnika 2021
T1  - Optimizacija procesa uklanjanja anjonskih boja iz vodenih medijuma primenom katjonskih adsorbenata na bazi skroba
T1  - Optimization of process removal of anionic dyes from aqueous media using cationic adsorbents based on starch
EP  - 135
SP  - 130
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6117
ER  - 

@conference{
author = "Karić, Nataša and Maletić, Marina and Rnjaković, Danka and Vukčević, Marija and Perić-Grujić, Aleksandra and Ristić, Mirjana and Trivunac, Katarina",
year = "2021",
abstract = "Tekstilna industrija spada u red industrija sa najvećom potrošnjom vode u svom
proizvodnom procesu. Opšta karakteristika otpadnih voda iz tekstilne industrije je, pre svega, visok
sadržaj organskih materija i visoka obojenost. Sa aspekta zaštite životne sredine, uslovi za
ispuštanje otpadnih voda su sve strožiji, dok je primena ekološki i ekonomski prihvatljivih
adsorbenata za tretman otpadnih voda veliki izazov današnjice. Upravo zbog toga, u okviru ovog
rada ispitivana je mogućnost primene katjonskih adsorbenata na bazi prirodnog materijala skroba
za uklanjanje metil oranž (MO) boje iz vodenih rastvora. Korišćena su dva derivata katjonskog
skroba, skrob modifikovan sa glicidiltrimetilamonijum hloridom (CS-G) i skrob modifikovan sa
betain hidrohloridom (CS-B). Karakterizacija funkcionalnih grupa na površini materijala izvršena
je korišćenjem infracrvene spektroskopije sa Furijeovom transformacijom (FTIR), dok je
morfologija materijala ispitana pomoću skenirajuće elektronske mikroskopije (SEM). Kako bi se
utvrdili optimalni adsorpcioni uslovi ispitana je kinetika adsorpcije, adsorpcione izoterme, kao i
uticaj pH vrednosti. Na osnovu dobijenih kapaciteta adsorpcije pri optimalnim uslovima, određene
su efikasnosti uklanjanja MO iz vodenih medijuma. Takođe, ispitana je i adsorpcija drugih
anjonskih i katjonskih boja. Ispitivani katjonski skrobovi su se pokazali kao efikasni adsorbenti za
uklanjanje MO i drugih anjonskih (alizarin crveno S, ARS), ali i katjonskih (metilensko plavo, MB i
brilijant zelena, BG) boja iz vodenih rastvora., The textile industry is one of the industries with the highest water consumption in its
production process. The general characteristic of wastewater from the textile industry is, primarily,
the high content of organic matters and high coloration. From the aspect of environmental
protection, the conditions for wastewater discharge are becoming more stringent, while the
application of environmentally and economically acceptable adsorbents for wastewater treatment is
a great challenge today. For this reason, the possibility of using cationic adsorbents based on natural starch material to remove methyl orange (MO) from aqueous solutions was investigated.
Two cationic starch derivatives were used, starch modified with glycidyltrimethylammonium
chloride (CS-G) and starch modified with betaine hydrochloride (CS-B). Surface functional groups
were characterized by Fourier transform infrared spectroscopy (FTIR), while the morphology of
the material was examined using scanning electron microscopy (SEM). In order to determine the
optimal reaction conditions, the kinetics of adsorption, adsorption isotherms, as well as the
influence of pH values were examined. Based on the obtained adsorption capacities under optimal
conditions, the efficiencies of MO removal from aqueous media were determined. The adsorption of
other anionic and cationic dyes was also investigated. The tested cationic starches proved to be
effective adsorbents for the removal of MO and other anionic (alizarin red S, ARS), but also
cationic (methylene blue, MB and brilliant green, BG) dyes from aqueous solutions.",
publisher = "AKADEMIJA TEHNIČKIH STRUKOVNIH STUDIJA BEOGRAD",
journal = "Šesti naučno-stručni skup Politehnika 2021",
title = "Optimizacija procesa uklanjanja anjonskih boja iz vodenih medijuma primenom katjonskih adsorbenata na bazi skroba, Optimization of process removal of anionic dyes from aqueous media using cationic adsorbents based on starch",
pages = "135-130",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6117"
}

Karić, N., Maletić, M., Rnjaković, D., Vukčević, M., Perić-Grujić, A., Ristić, M.,& Trivunac, K.. (2021). Optimizacija procesa uklanjanja anjonskih boja iz vodenih medijuma primenom katjonskih adsorbenata na bazi skroba. in Šesti naučno-stručni skup Politehnika 2021
AKADEMIJA TEHNIČKIH STRUKOVNIH STUDIJA BEOGRAD., 130-135.
https://hdl.handle.net/21.15107/rcub_technorep_6117

Karić N, Maletić M, Rnjaković D, Vukčević M, Perić-Grujić A, Ristić M, Trivunac K. Optimizacija procesa uklanjanja anjonskih boja iz vodenih medijuma primenom katjonskih adsorbenata na bazi skroba. in Šesti naučno-stručni skup Politehnika 2021. 2021;:130-135.
https://hdl.handle.net/21.15107/rcub_technorep_6117 .

Karić, Nataša, Maletić, Marina, Rnjaković, Danka, Vukčević, Marija, Perić-Grujić, Aleksandra, Ristić, Mirjana, Trivunac, Katarina, "Optimizacija procesa uklanjanja anjonskih boja iz vodenih medijuma primenom katjonskih adsorbenata na bazi skroba" in Šesti naučno-stručni skup Politehnika 2021 (2021):130-135,
https://hdl.handle.net/21.15107/rcub_technorep_6117 .

TY  - CONF
AU  - Karić, Nataša
AU  - Maletić, Marina
AU  - Marković, Natalija
AU  - Vukčević, Marija
AU  - Perić-Grujić, Aleksandra
AU  - Ristić, Mirjana
AU  - Trivunac, Katarina
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6118
AB  - Cilj ovog rada bio je ispitivanje adsorpcionih svojstava materijala na bazi skroba za
uklanjanje fosfora iz vodenih rastvora. U komunalnim i industrijskim otpadnim vodama fosfor je
dosta prisutan u obliku rastvornih fosfata, pa je prečišćavanje otpadnih voda i uklanjanje fosfata od
presudnog značaja za sprečavanje procesa eutrofikacije, odnosno pogoršanja kvaliteta voda usled
bujanja biljnih vrsta, naročito algi i cijanobakterija. Zbog svoje jednostavnosti, ekonomičnosti i
efikasnosti, adsorpcija postaje sve atraktivnija metoda za uklanjanje fosfata iz otpadnih voda. Kao
adsorpcioni materijali korišćeni su katjonski skrobovi dobijeni katjonizacijom skroba sa
glicidiltrimetilamonijum hloridom (CS-G) i betain hidrohloridom (CS-B). Adsorpciona ispitivanja
su izvršena u šaržnom sistemu. Efikasnost adsorpcije određena je spektrofotometrijski, dok su
apsorpcione krive iskorišćene za određivanje radne talasne dužine. Ispitana je kinetika procesa,
adsorpcione izoterme, kao i uticaj pH vrednosti rastvora na kapacitet adsorpcije. Dobijeni rezultati
su upoređeni sa modelima adsorpcionih izotermi (Langmuir i Freundlich) da bi se odredilo
slaganje i dobile informacije o mehanizmu i tipu adsorpcionog procesa. Takođe, ispitan je i uticaj
prisustva pojedinačnih anjona (sulfata, fluorida i nitrata) na efikasnost adsorpcije. Rezultati
adsorpcionih ispitivanja su pokazali da se CS-G i CS-B mogu koristiti kao efikasni prirodni
adsorbenti za uklanjanje jona fosfata iz vodenih rastvora.
AB  - The aim of this study was to investigate the adsorption properties of starch-based
materials for removing phosphorus from aqueous solutions. In municipal and industrial wastewater
phosphorus is quite present in the form of soluble phosphates, so wastewater treatment and
phosphate removal are crucial to prevent the process of eutrophication, i.e. deterioration of water
quality due to the proliferation of plant species, especially algae and cyanobacteria. Due to its simplicity, economy, and efficiency, adsorption is becoming an increasingly significant method for
removing phosphate from wastewater. Cationic starches obtained by cationization of starch with
glycidyltrimethylammonium chloride (CS-G) and betaine hydrochloride (CS-B) were used as
adsorption materials. Adsorption tests were performed in a batch system. The adsorption efficiency
was determined spectrophotometrically, while the apsorption curves were used to determine the
operating wavelength. The kinetics of the process, adsorption isotherms, as well as the influence of
the pH value of the solution on the adsorption capacity were investigated. The obtained results were
compared with models of adsorption isotherms (Langmuir and Freundlich) in order to determine
the agreement and obtain information about the mechanism and type of adsorption process. The
influence of the presence of individual anions (sulphate, fluoride, and nitrate) on the adsorption
efficiency was also examined. The results of adsorption studies have shown that CS-G and CS-B
can be used as effective natural adsorbents to remove phosphate ions from aqueous solutions.
PB  - AKADEMIJA TEHNIČKIH STRUKOVNIH STUDIJA BEOGRAD
C3  - Šesti naučno-stručni skup Politehnika 2021
T1  - Proučavanje adsorpcionih svojstava katjonski modifikovanog skroba za uklanjanje fosfata iz vodenih rastvora
T1  - Study of adsorption properties of cationic modified starch for phosphate removal from aqueous solutions
EP  - 142
SP  - 136
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6118
ER  - 

@conference{
author = "Karić, Nataša and Maletić, Marina and Marković, Natalija and Vukčević, Marija and Perić-Grujić, Aleksandra and Ristić, Mirjana and Trivunac, Katarina",
year = "2021",
abstract = "Cilj ovog rada bio je ispitivanje adsorpcionih svojstava materijala na bazi skroba za
uklanjanje fosfora iz vodenih rastvora. U komunalnim i industrijskim otpadnim vodama fosfor je
dosta prisutan u obliku rastvornih fosfata, pa je prečišćavanje otpadnih voda i uklanjanje fosfata od
presudnog značaja za sprečavanje procesa eutrofikacije, odnosno pogoršanja kvaliteta voda usled
bujanja biljnih vrsta, naročito algi i cijanobakterija. Zbog svoje jednostavnosti, ekonomičnosti i
efikasnosti, adsorpcija postaje sve atraktivnija metoda za uklanjanje fosfata iz otpadnih voda. Kao
adsorpcioni materijali korišćeni su katjonski skrobovi dobijeni katjonizacijom skroba sa
glicidiltrimetilamonijum hloridom (CS-G) i betain hidrohloridom (CS-B). Adsorpciona ispitivanja
su izvršena u šaržnom sistemu. Efikasnost adsorpcije određena je spektrofotometrijski, dok su
apsorpcione krive iskorišćene za određivanje radne talasne dužine. Ispitana je kinetika procesa,
adsorpcione izoterme, kao i uticaj pH vrednosti rastvora na kapacitet adsorpcije. Dobijeni rezultati
su upoređeni sa modelima adsorpcionih izotermi (Langmuir i Freundlich) da bi se odredilo
slaganje i dobile informacije o mehanizmu i tipu adsorpcionog procesa. Takođe, ispitan je i uticaj
prisustva pojedinačnih anjona (sulfata, fluorida i nitrata) na efikasnost adsorpcije. Rezultati
adsorpcionih ispitivanja su pokazali da se CS-G i CS-B mogu koristiti kao efikasni prirodni
adsorbenti za uklanjanje jona fosfata iz vodenih rastvora., The aim of this study was to investigate the adsorption properties of starch-based
materials for removing phosphorus from aqueous solutions. In municipal and industrial wastewater
phosphorus is quite present in the form of soluble phosphates, so wastewater treatment and
phosphate removal are crucial to prevent the process of eutrophication, i.e. deterioration of water
quality due to the proliferation of plant species, especially algae and cyanobacteria. Due to its simplicity, economy, and efficiency, adsorption is becoming an increasingly significant method for
removing phosphate from wastewater. Cationic starches obtained by cationization of starch with
glycidyltrimethylammonium chloride (CS-G) and betaine hydrochloride (CS-B) were used as
adsorption materials. Adsorption tests were performed in a batch system. The adsorption efficiency
was determined spectrophotometrically, while the apsorption curves were used to determine the
operating wavelength. The kinetics of the process, adsorption isotherms, as well as the influence of
the pH value of the solution on the adsorption capacity were investigated. The obtained results were
compared with models of adsorption isotherms (Langmuir and Freundlich) in order to determine
the agreement and obtain information about the mechanism and type of adsorption process. The
influence of the presence of individual anions (sulphate, fluoride, and nitrate) on the adsorption
efficiency was also examined. The results of adsorption studies have shown that CS-G and CS-B
can be used as effective natural adsorbents to remove phosphate ions from aqueous solutions.",
publisher = "AKADEMIJA TEHNIČKIH STRUKOVNIH STUDIJA BEOGRAD",
journal = "Šesti naučno-stručni skup Politehnika 2021",
title = "Proučavanje adsorpcionih svojstava katjonski modifikovanog skroba za uklanjanje fosfata iz vodenih rastvora, Study of adsorption properties of cationic modified starch for phosphate removal from aqueous solutions",
pages = "142-136",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6118"
}

Karić, N., Maletić, M., Marković, N., Vukčević, M., Perić-Grujić, A., Ristić, M.,& Trivunac, K.. (2021). Proučavanje adsorpcionih svojstava katjonski modifikovanog skroba za uklanjanje fosfata iz vodenih rastvora. in Šesti naučno-stručni skup Politehnika 2021
AKADEMIJA TEHNIČKIH STRUKOVNIH STUDIJA BEOGRAD., 136-142.
https://hdl.handle.net/21.15107/rcub_technorep_6118

Karić N, Maletić M, Marković N, Vukčević M, Perić-Grujić A, Ristić M, Trivunac K. Proučavanje adsorpcionih svojstava katjonski modifikovanog skroba za uklanjanje fosfata iz vodenih rastvora. in Šesti naučno-stručni skup Politehnika 2021. 2021;:136-142.
https://hdl.handle.net/21.15107/rcub_technorep_6118 .

Karić, Nataša, Maletić, Marina, Marković, Natalija, Vukčević, Marija, Perić-Grujić, Aleksandra, Ristić, Mirjana, Trivunac, Katarina, "Proučavanje adsorpcionih svojstava katjonski modifikovanog skroba za uklanjanje fosfata iz vodenih rastvora" in Šesti naučno-stručni skup Politehnika 2021 (2021):136-142,
https://hdl.handle.net/21.15107/rcub_technorep_6118 .

TY  - CONF
AU  - Stanišić, Tijana
AU  - Karić, Nataša
AU  - Karanac, Milica
AU  - Đolić, Maja
AU  - Ristić, Mirjana
AU  - Perić-Grujić, Aleksandra
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6115
AB  - U ovom radu ispitana su adsorpciona svojstva tri prirodna mineralna materijala za uklanjanje
Pb(II) i As(V) jona iz vodenih rastvora. Sveobuhvatna strukturna analiza pokazala je glavne mineralne komponente, SiO2, Al2O3 i Fe2O3, a najveći udeo u sastavu ovih materijala imaju kvarc, mikrolin
i kaolinit. Optimalni uslovi su utvrđeni na osnovu rezultata dosadašnjih istraživanja i variranjem mase
ispitivanih adsorbenata. Rezultati su pokazali da sa povećanjem mase materijala raste efikasnost uklanjanja jona , sve do optimalnog odnosa (m:V=1:1), nakon čega je efikasnost uklanjanja zanemarljiva.
Najbolju efikasnost uklanjanja, pri optimalnim uslovima, pokazao je materijal čija je glavna tekstura
ilovača (94,8 %) pri uklanjanju Pb(II) jona i materijal čija je glavna tekstura peskovita ilovača (47,5
%) pri separaciji As(V) jona. Dalja ispitivanja će biti usmerena na ispitivanje simultanog izdvajanja
odabranih jona, kao i na određivanje adsorpcionih izotermi, kinetičkih i termodinamičkih parametara procesa adsorpcije, mogućnosti regeneracije upotrebljenih adsorbenata, kao i njihove ponovne upotrebe
ili bezbednog zbrinjavanja, nakon adsorpcije.
AB  - The aim of this research is to examine the efficiency of raw mineral materials that possess good
adsorption and techno-economic properties applicable in real systems for the removal of heavy metal
ions, primarily lead and arsenic. The adsorption studies were conducted in batch system. To determine the optimal conditions, the adsorption efficiency of the selected ions was tested by variation of
the adsorbents mass (5, 7.5, 10 and 20 mg). The materials used in the experimental work are of
mineral origin, whose composition consists mainly of SiO2, Al2O3 and Fe2O3. The characterization
of analyzed materials was performed using X-Ray Diffraction (XRD), Fourier-Transform Infrared
Spectroscopy (FTIR) and scanning electron microscopy (SEM). The maximum removal efficiency of
lead ions is 94.8 %, on the material predominantly composed of loam, while for arsenic it is 47.5 %
on material based on sandy loam.
PB  - Departman za energetiku i procesnu tehniku - FTN
C3  - Međunarodni kongres o procesnoj industriji - Procesing '21
T1  - Prirodni adsorbenti na bazi metalnih oksida za uklanjanje jona olova i arsena iz vodenih rastvora
DO  - 10.24094/ptk.021.34.1.43
ER  - 

@conference{
author = "Stanišić, Tijana and Karić, Nataša and Karanac, Milica and Đolić, Maja and Ristić, Mirjana and Perić-Grujić, Aleksandra",
year = "2021",
abstract = "U ovom radu ispitana su adsorpciona svojstva tri prirodna mineralna materijala za uklanjanje
Pb(II) i As(V) jona iz vodenih rastvora. Sveobuhvatna strukturna analiza pokazala je glavne mineralne komponente, SiO2, Al2O3 i Fe2O3, a najveći udeo u sastavu ovih materijala imaju kvarc, mikrolin
i kaolinit. Optimalni uslovi su utvrđeni na osnovu rezultata dosadašnjih istraživanja i variranjem mase
ispitivanih adsorbenata. Rezultati su pokazali da sa povećanjem mase materijala raste efikasnost uklanjanja jona , sve do optimalnog odnosa (m:V=1:1), nakon čega je efikasnost uklanjanja zanemarljiva.
Najbolju efikasnost uklanjanja, pri optimalnim uslovima, pokazao je materijal čija je glavna tekstura
ilovača (94,8 %) pri uklanjanju Pb(II) jona i materijal čija je glavna tekstura peskovita ilovača (47,5
%) pri separaciji As(V) jona. Dalja ispitivanja će biti usmerena na ispitivanje simultanog izdvajanja
odabranih jona, kao i na određivanje adsorpcionih izotermi, kinetičkih i termodinamičkih parametara procesa adsorpcije, mogućnosti regeneracije upotrebljenih adsorbenata, kao i njihove ponovne upotrebe
ili bezbednog zbrinjavanja, nakon adsorpcije., The aim of this research is to examine the efficiency of raw mineral materials that possess good
adsorption and techno-economic properties applicable in real systems for the removal of heavy metal
ions, primarily lead and arsenic. The adsorption studies were conducted in batch system. To determine the optimal conditions, the adsorption efficiency of the selected ions was tested by variation of
the adsorbents mass (5, 7.5, 10 and 20 mg). The materials used in the experimental work are of
mineral origin, whose composition consists mainly of SiO2, Al2O3 and Fe2O3. The characterization
of analyzed materials was performed using X-Ray Diffraction (XRD), Fourier-Transform Infrared
Spectroscopy (FTIR) and scanning electron microscopy (SEM). The maximum removal efficiency of
lead ions is 94.8 %, on the material predominantly composed of loam, while for arsenic it is 47.5 %
on material based on sandy loam.",
publisher = "Departman za energetiku i procesnu tehniku - FTN",
journal = "Međunarodni kongres o procesnoj industriji - Procesing '21",
title = "Prirodni adsorbenti na bazi metalnih oksida za uklanjanje jona olova i arsena iz vodenih rastvora",
doi = "10.24094/ptk.021.34.1.43"
}

Stanišić, T., Karić, N., Karanac, M., Đolić, M., Ristić, M.,& Perić-Grujić, A.. (2021). Prirodni adsorbenti na bazi metalnih oksida za uklanjanje jona olova i arsena iz vodenih rastvora. in Međunarodni kongres o procesnoj industriji - Procesing '21
Departman za energetiku i procesnu tehniku - FTN..
https://doi.org/10.24094/ptk.021.34.1.43

Stanišić T, Karić N, Karanac M, Đolić M, Ristić M, Perić-Grujić A. Prirodni adsorbenti na bazi metalnih oksida za uklanjanje jona olova i arsena iz vodenih rastvora. in Međunarodni kongres o procesnoj industriji - Procesing '21. 2021;.
doi:10.24094/ptk.021.34.1.43 .

Stanišić, Tijana, Karić, Nataša, Karanac, Milica, Đolić, Maja, Ristić, Mirjana, Perić-Grujić, Aleksandra, "Prirodni adsorbenti na bazi metalnih oksida za uklanjanje jona olova i arsena iz vodenih rastvora" in Međunarodni kongres o procesnoj industriji - Procesing '21 (2021),
https://doi.org/10.24094/ptk.021.34.1.43 . .

TY  - CONF
AU  - Stanišić, Tijana
AU  - Đolić, Maja
AU  - Ćujić, Mirjana
AU  - Ristić, Mirjana
AU  - Perić-Grujić, Aleksandra
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6313
AB  - Olovo i arsen predstavljaju značajnu grupu neorganskih polutanata koji su prisutni u
životnoj sredini, pre svega u vodenim sistemima, pa je njihovo uklanjanje veliki tehničkotehnološki izazov. Zbog toga se sve više pažnje posvećuje razvoju pristupačnih, efikasnih i
ekološki prihvatljivih adsorbenata. Prirodni materijali na bazi oksida metala (SiO2, Al2O3,
Fe2O3), poput ilovače, predstavljaju efikasne adsorbente za uklanjanje katjonskih i anjonskih
vrsta iz vodenih rastvora. U ovom radu adsorpciona svojstva ilovače ispitivana su u šaržnom
sistemu, promenom pH vrednosti početnog rastvora, dok su masa adsorbenta, vreme i
temperature procesa bili konstantni. Značajnu ulogu u odvijanju adsorpcionog procesa ima pH
vrednost rastvora, stoga se eksperiment zasnivao na određivanju efikasnosti procesa pri vrednosti
pH rastvora 4, 5 i 6. Strukturne karakteristike ilovače su određene primenom rendgenske
difrakcione analize (engl. X-Ray Difraction, XRD), infracrvenom spektroskopijom sa Furijeovom
transformacijom (engl. Fourier-Transform Infrared Spectroscopy, FTIR) i skenirajuće elektronske
mikroskopije (engl. Scanning electron microscopy, SEM). Koncentracija jona nakon procesa
adsorpcije određena je pomoću indukovano spregnute plazme sa masenom spektrometrijom (engl.
Inductively Coupled Plasma Mass Spectrometry, ICP-MS). Maksimalna efikasnost uklanjanja
jona olova postignuta je na pH vrednosti 5 (94,2 %), dok je za jone arsena optimalna pH vrednost
bila 6 (35,1 %).
AB  - Lead and arsenic represent an important group of inorganic pollutants that can be found in the environment, primarily in aquatic systems. Their removal from water systems is a big environmental problem, but also a significant technological challenge. Therefore, an increasing attention is paid to the development of widely available, efficient and environmentally friendly adsorbents. Natural metal oxide-based materials (SiO2, Al2O3, Fe2O3), such as loam, are effective adsorbents for removal of cationic and anionic species. The adsorption experiments were performed in a batch system, varying the pH value of the initial solution, while the mass of adsorbent, time and temperature were constant. The influence of pH value has a leading influence to the adsorption process so the process efficiency was determined at the pH values set at: 4, 5 and 6. The structural characteristics of the loam was performed using X-ray diffraction analysis (XRD), Fourier-Transform Infrared Spectroscopy (FTIR) and scanning electron microscopy (SEM). The concentration of ions after their removal was determined using inductively coupled plasma mass spectrometry (ICP-MS). The maximum removal of lead ions was obtained at pH 5 (94.2%), while for arsenic ions, it was at pH 6 (35.1%).
PB  - Akademija tehničkih strukovnih studija Beograd
C3  - 6. Naučno-stručni skup Politehnika, Zbornik radova
T1  - Ispitivanje adsorpcionih svojstava ilovače za uklanjanje jona olova i arsena iz vodenih rastvora
EP  - 148
SP  - 143
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6313
ER  - 

@conference{
author = "Stanišić, Tijana and Đolić, Maja and Ćujić, Mirjana and Ristić, Mirjana and Perić-Grujić, Aleksandra",
year = "2021",
abstract = "Olovo i arsen predstavljaju značajnu grupu neorganskih polutanata koji su prisutni u
životnoj sredini, pre svega u vodenim sistemima, pa je njihovo uklanjanje veliki tehničkotehnološki izazov. Zbog toga se sve više pažnje posvećuje razvoju pristupačnih, efikasnih i
ekološki prihvatljivih adsorbenata. Prirodni materijali na bazi oksida metala (SiO2, Al2O3,
Fe2O3), poput ilovače, predstavljaju efikasne adsorbente za uklanjanje katjonskih i anjonskih
vrsta iz vodenih rastvora. U ovom radu adsorpciona svojstva ilovače ispitivana su u šaržnom
sistemu, promenom pH vrednosti početnog rastvora, dok su masa adsorbenta, vreme i
temperature procesa bili konstantni. Značajnu ulogu u odvijanju adsorpcionog procesa ima pH
vrednost rastvora, stoga se eksperiment zasnivao na određivanju efikasnosti procesa pri vrednosti
pH rastvora 4, 5 i 6. Strukturne karakteristike ilovače su određene primenom rendgenske
difrakcione analize (engl. X-Ray Difraction, XRD), infracrvenom spektroskopijom sa Furijeovom
transformacijom (engl. Fourier-Transform Infrared Spectroscopy, FTIR) i skenirajuće elektronske
mikroskopije (engl. Scanning electron microscopy, SEM). Koncentracija jona nakon procesa
adsorpcije određena je pomoću indukovano spregnute plazme sa masenom spektrometrijom (engl.
Inductively Coupled Plasma Mass Spectrometry, ICP-MS). Maksimalna efikasnost uklanjanja
jona olova postignuta je na pH vrednosti 5 (94,2 %), dok je za jone arsena optimalna pH vrednost
bila 6 (35,1 %)., Lead and arsenic represent an important group of inorganic pollutants that can be found in the environment, primarily in aquatic systems. Their removal from water systems is a big environmental problem, but also a significant technological challenge. Therefore, an increasing attention is paid to the development of widely available, efficient and environmentally friendly adsorbents. Natural metal oxide-based materials (SiO2, Al2O3, Fe2O3), such as loam, are effective adsorbents for removal of cationic and anionic species. The adsorption experiments were performed in a batch system, varying the pH value of the initial solution, while the mass of adsorbent, time and temperature were constant. The influence of pH value has a leading influence to the adsorption process so the process efficiency was determined at the pH values set at: 4, 5 and 6. The structural characteristics of the loam was performed using X-ray diffraction analysis (XRD), Fourier-Transform Infrared Spectroscopy (FTIR) and scanning electron microscopy (SEM). The concentration of ions after their removal was determined using inductively coupled plasma mass spectrometry (ICP-MS). The maximum removal of lead ions was obtained at pH 5 (94.2%), while for arsenic ions, it was at pH 6 (35.1%).",
publisher = "Akademija tehničkih strukovnih studija Beograd",
journal = "6. Naučno-stručni skup Politehnika, Zbornik radova",
title = "Ispitivanje adsorpcionih svojstava ilovače za uklanjanje jona olova i arsena iz vodenih rastvora",
pages = "148-143",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6313"
}

Stanišić, T., Đolić, M., Ćujić, M., Ristić, M.,& Perić-Grujić, A.. (2021). Ispitivanje adsorpcionih svojstava ilovače za uklanjanje jona olova i arsena iz vodenih rastvora. in 6. Naučno-stručni skup Politehnika, Zbornik radova
Akademija tehničkih strukovnih studija Beograd., 143-148.
https://hdl.handle.net/21.15107/rcub_technorep_6313

Stanišić T, Đolić M, Ćujić M, Ristić M, Perić-Grujić A. Ispitivanje adsorpcionih svojstava ilovače za uklanjanje jona olova i arsena iz vodenih rastvora. in 6. Naučno-stručni skup Politehnika, Zbornik radova. 2021;:143-148.
https://hdl.handle.net/21.15107/rcub_technorep_6313 .

Stanišić, Tijana, Đolić, Maja, Ćujić, Mirjana, Ristić, Mirjana, Perić-Grujić, Aleksandra, "Ispitivanje adsorpcionih svojstava ilovače za uklanjanje jona olova i arsena iz vodenih rastvora" in 6. Naučno-stručni skup Politehnika, Zbornik radova (2021):143-148,
https://hdl.handle.net/21.15107/rcub_technorep_6313 .

TY  - CONF
AU  - Stanišić, Tijana
AU  - Đolić, Maja
AU  - Kokunesoski, Maja
AU  - Ristić, Mirjana
AU  - Perić-Grujić, Aleksandra
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6325
AB  - Cilj istraživanja ovog rada bio je ispitivanje mogućnosti primene prirodnih
nemodifikovanih materijala kao adsorbenata za efikasno uklanjanje Pb2+ jona iz vode. Korišćena
su dva materijala čiji sastav čini smeša oksida SiO2, Al2O3 i Fe2O3. Na osnovu teksturne
klasifikacije uzoraka, analizirani materijali spadaju u peskovitu ilovaču i ilovasti pesak. U okviru
rada izvršena je karakterizacija materijala primenom rendgenske difrakcione analize (engl. X-Ray
Difraction, XRD) i infracrvene spektroskopije sa Furijeovom transformacijom (engl. Fourier-
Transform Infrared Spectroscopy, FTIR). Proces adsorpcije Pb2+ jona na prirodnim materijalima
ispitan je u šaržnom sistemu, variranjem mase adsorbenta i pH vrednosti rastvora. Peskovita
ilovača i ilovasti pesak pokazali su visoku efikasnost za uklanjanje Pb2+ jona iz vode, bez prethodne
hemijske modfikacije. Efikasnost uklanjanja jona olova uz pomoć peskovite ilovače i ilovastog
pesaka iznosi 88,2 % i 80,2 %, pri optimalnim uslovima (Ci (Pb2+)=100 μg L-1, mads=10 mg i
pH=5). Dobijeni rezultati pokazuju i potvrđuju da se prirodni materijali na bazi oksida metala
mogu koristiti kao efikasni adsorbenti za uklanjanje katjonskih oblika teških metala iz vode.
AB  - The aim of this study was to examine the possibility of using natural unmodified materials
as adsorbents for efficient removal of Pb2+ions from aqueous solution. Two raw materials
composed of SiO2, Al2O3 and Fe2O3, were analyzed. According to the textural classification the tested materials belong to sandy loam and loamy sand. In this research, X-ray diffraction analysis (XRD) and Fourier-Transform infrared spectroscopy (FTIR) were used for structural characterization of the materials. The process of adsorption of Pb2+ ions onto natural materials was conducted in a batch system. In order to determine optimal conditions, the mass of the adsorbent and the pH value of the solution were varied. Sandy loam and loamy sand have shown high efficiency for removing Pb2+ions from aqueous solution, without previous chemical modification. The efficiency of removal of lead ions on sandy loam and loamy sand is 88.2% and 80.2%, respectively, under optimal conditions (Ci(Pb2+)=100 μg L-1, mads=10 mg and pH 5). This study confirms that natural materials based on metal oxides can be used as effective adsorbents toremove cationic species of heavy metals from water systems.
PB  - Akademija tehničkih strukovnih studija Beograd
C3  - 6. Naučno-stručni skup Politehnika, Zbornik radova
T1  - Heterogeni prirodni materijali mineralne strukture kao efikasni adsorbenti za uklanjanje Pb2+ jona iz vode
EP  - 154
SP  - 149
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6325
ER  - 

@conference{
author = "Stanišić, Tijana and Đolić, Maja and Kokunesoski, Maja and Ristić, Mirjana and Perić-Grujić, Aleksandra",
year = "2021",
abstract = "Cilj istraživanja ovog rada bio je ispitivanje mogućnosti primene prirodnih
nemodifikovanih materijala kao adsorbenata za efikasno uklanjanje Pb2+ jona iz vode. Korišćena
su dva materijala čiji sastav čini smeša oksida SiO2, Al2O3 i Fe2O3. Na osnovu teksturne
klasifikacije uzoraka, analizirani materijali spadaju u peskovitu ilovaču i ilovasti pesak. U okviru
rada izvršena je karakterizacija materijala primenom rendgenske difrakcione analize (engl. X-Ray
Difraction, XRD) i infracrvene spektroskopije sa Furijeovom transformacijom (engl. Fourier-
Transform Infrared Spectroscopy, FTIR). Proces adsorpcije Pb2+ jona na prirodnim materijalima
ispitan je u šaržnom sistemu, variranjem mase adsorbenta i pH vrednosti rastvora. Peskovita
ilovača i ilovasti pesak pokazali su visoku efikasnost za uklanjanje Pb2+ jona iz vode, bez prethodne
hemijske modfikacije. Efikasnost uklanjanja jona olova uz pomoć peskovite ilovače i ilovastog
pesaka iznosi 88,2 % i 80,2 %, pri optimalnim uslovima (Ci (Pb2+)=100 μg L-1, mads=10 mg i
pH=5). Dobijeni rezultati pokazuju i potvrđuju da se prirodni materijali na bazi oksida metala
mogu koristiti kao efikasni adsorbenti za uklanjanje katjonskih oblika teških metala iz vode., The aim of this study was to examine the possibility of using natural unmodified materials
as adsorbents for efficient removal of Pb2+ions from aqueous solution. Two raw materials
composed of SiO2, Al2O3 and Fe2O3, were analyzed. According to the textural classification the tested materials belong to sandy loam and loamy sand. In this research, X-ray diffraction analysis (XRD) and Fourier-Transform infrared spectroscopy (FTIR) were used for structural characterization of the materials. The process of adsorption of Pb2+ ions onto natural materials was conducted in a batch system. In order to determine optimal conditions, the mass of the adsorbent and the pH value of the solution were varied. Sandy loam and loamy sand have shown high efficiency for removing Pb2+ions from aqueous solution, without previous chemical modification. The efficiency of removal of lead ions on sandy loam and loamy sand is 88.2% and 80.2%, respectively, under optimal conditions (Ci(Pb2+)=100 μg L-1, mads=10 mg and pH 5). This study confirms that natural materials based on metal oxides can be used as effective adsorbents toremove cationic species of heavy metals from water systems.",
publisher = "Akademija tehničkih strukovnih studija Beograd",
journal = "6. Naučno-stručni skup Politehnika, Zbornik radova",
title = "Heterogeni prirodni materijali mineralne strukture kao efikasni adsorbenti za uklanjanje Pb2+ jona iz vode",
pages = "154-149",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6325"
}

Stanišić, T., Đolić, M., Kokunesoski, M., Ristić, M.,& Perić-Grujić, A.. (2021). Heterogeni prirodni materijali mineralne strukture kao efikasni adsorbenti za uklanjanje Pb2+ jona iz vode. in 6. Naučno-stručni skup Politehnika, Zbornik radova
Akademija tehničkih strukovnih studija Beograd., 149-154.
https://hdl.handle.net/21.15107/rcub_technorep_6325

Stanišić T, Đolić M, Kokunesoski M, Ristić M, Perić-Grujić A. Heterogeni prirodni materijali mineralne strukture kao efikasni adsorbenti za uklanjanje Pb2+ jona iz vode. in 6. Naučno-stručni skup Politehnika, Zbornik radova. 2021;:149-154.
https://hdl.handle.net/21.15107/rcub_technorep_6325 .

Stanišić, Tijana, Đolić, Maja, Kokunesoski, Maja, Ristić, Mirjana, Perić-Grujić, Aleksandra, "Heterogeni prirodni materijali mineralne strukture kao efikasni adsorbenti za uklanjanje Pb2+ jona iz vode" in 6. Naučno-stručni skup Politehnika, Zbornik radova (2021):149-154,
https://hdl.handle.net/21.15107/rcub_technorep_6325 .

TY  - JOUR
AU  - Karić, Nataša
AU  - Vukčević, Marija
AU  - Ristić, Mirjana
AU  - Perić-Grujić, Aleksandra
AU  - Marinković, Aleksandar
AU  - Trivunac, Katarina
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4777
AB  - In this study, a novel simple and eco-efficient, semi-dry method with a spray system for starch modification has been developed. Compared to conventional semi-dry methods, this method does not use solvents so that no slurry or semi-liquid mixture is obtained, the material is in a moisted/semi-moisted state. The modification of starch was performed using betaine hydrochloride (BHC) as the cationic reagent, and the characteristics of such starch derivates were compared with cationic starches obtained using glycidyltrimethylammonium chloride (GTMAC). Due to the instability, toxicity, and high cost of the most commonly used GTMAC, it should be replaced with more eco-friendly reagents, such as BHC, which is derived from betaine found in most green plants (e.g., spinach - Spinacia oleracea, beets - Beta vulgaris). The influence of processing conditions such as temperature, concentration of cationic reagents, presence and concentration of natural plasticizers/catalyst on physico-chemical and structural properties of cationic starches have also been studied. The cationic degree varied from 0.045-0.204 for the starch-BHC samples and within the range of 0.066-0.245 for the starch-GTMAC samples. The modification of starch with cationic reagents resulted in an increased solubility and swelling capacity, followed by decreased viscosity of the modified starches.
T2  - International Journal of Biological Macromolecules
T1  - A green approach to starch modification by solvent-free method with betaine hydrochloride
EP  - 1971
SP  - 1962
VL  - 193
DO  - 10.1016/j.ijbiomac.2021.11.027
ER  - 

@article{
author = "Karić, Nataša and Vukčević, Marija and Ristić, Mirjana and Perić-Grujić, Aleksandra and Marinković, Aleksandar and Trivunac, Katarina",
year = "2021",
abstract = "In this study, a novel simple and eco-efficient, semi-dry method with a spray system for starch modification has been developed. Compared to conventional semi-dry methods, this method does not use solvents so that no slurry or semi-liquid mixture is obtained, the material is in a moisted/semi-moisted state. The modification of starch was performed using betaine hydrochloride (BHC) as the cationic reagent, and the characteristics of such starch derivates were compared with cationic starches obtained using glycidyltrimethylammonium chloride (GTMAC). Due to the instability, toxicity, and high cost of the most commonly used GTMAC, it should be replaced with more eco-friendly reagents, such as BHC, which is derived from betaine found in most green plants (e.g., spinach - Spinacia oleracea, beets - Beta vulgaris). The influence of processing conditions such as temperature, concentration of cationic reagents, presence and concentration of natural plasticizers/catalyst on physico-chemical and structural properties of cationic starches have also been studied. The cationic degree varied from 0.045-0.204 for the starch-BHC samples and within the range of 0.066-0.245 for the starch-GTMAC samples. The modification of starch with cationic reagents resulted in an increased solubility and swelling capacity, followed by decreased viscosity of the modified starches.",
journal = "International Journal of Biological Macromolecules",
title = "A green approach to starch modification by solvent-free method with betaine hydrochloride",
pages = "1971-1962",
volume = "193",
doi = "10.1016/j.ijbiomac.2021.11.027"
}

Karić, N., Vukčević, M., Ristić, M., Perić-Grujić, A., Marinković, A.,& Trivunac, K.. (2021). A green approach to starch modification by solvent-free method with betaine hydrochloride. in International Journal of Biological Macromolecules, 193, 1962-1971.
https://doi.org/10.1016/j.ijbiomac.2021.11.027

Karić N, Vukčević M, Ristić M, Perić-Grujić A, Marinković A, Trivunac K. A green approach to starch modification by solvent-free method with betaine hydrochloride. in International Journal of Biological Macromolecules. 2021;193:1962-1971.
doi:10.1016/j.ijbiomac.2021.11.027 .

Karić, Nataša, Vukčević, Marija, Ristić, Mirjana, Perić-Grujić, Aleksandra, Marinković, Aleksandar, Trivunac, Katarina, "A green approach to starch modification by solvent-free method with betaine hydrochloride" in International Journal of Biological Macromolecules, 193 (2021):1962-1971,
https://doi.org/10.1016/j.ijbiomac.2021.11.027 . .