TY  - JOUR
AU  - Janković, Bojan
AU  - Smičiklas, Ivana D.
AU  - Manić, Nebojša
AU  - Mraković, Ana
AU  - Mandić, Milica
AU  - Veljović, Đorđe
AU  - Jović, Mihajlo
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4469
AB  - Thermo-oxidative degradation of mollusk shells to CaO through intermediate phase of CaCO3 has been investigated using various analytical techniques. Powders of shells species (Dosinia exoleta and Ostrea edulis), with particle size fractions of 0.045 - 0.125 mm, 0.125-0.2 mm, and 0.2-1 mm, were subjected to degradation at the various heating rates (5, 10, 15 and 20 degrees C min(-1)). Degradation pathway of this carbonate-rich waste material has not yet been analyzed in detail at particulate level. Understanding transformation process in air should lead to control over yield and morphology of final product. Thermogravimetric analysis (TGA) and X-ray diffraction (XRD) techniques were used to benchmark transformation steps at different heating rates and final decarbonation temperatures, while scanning electron microscope (SEM) was used to analyze the effect of temperature on evolution of morphological changes for particles of different fractions. It was found that sintering in the presence of carbon dioxide (CO2) could be triggered by agglomeration of CaO crystals, enhanced by CO2 adsorption that increases surface energy.
PB  - Elsevier, Amsterdam
T2  - Thermochimica Acta
T1  - Thermo-oxidative evolution and physico-chemical characterization of seashell waste for application in commercial sectors
VL  - 686
DO  - 10.1016/j.tca.2020.178568
ER  - 

@article{
author = "Janković, Bojan and Smičiklas, Ivana D. and Manić, Nebojša and Mraković, Ana and Mandić, Milica and Veljović, Đorđe and Jović, Mihajlo",
year = "2020",
abstract = "Thermo-oxidative degradation of mollusk shells to CaO through intermediate phase of CaCO3 has been investigated using various analytical techniques. Powders of shells species (Dosinia exoleta and Ostrea edulis), with particle size fractions of 0.045 - 0.125 mm, 0.125-0.2 mm, and 0.2-1 mm, were subjected to degradation at the various heating rates (5, 10, 15 and 20 degrees C min(-1)). Degradation pathway of this carbonate-rich waste material has not yet been analyzed in detail at particulate level. Understanding transformation process in air should lead to control over yield and morphology of final product. Thermogravimetric analysis (TGA) and X-ray diffraction (XRD) techniques were used to benchmark transformation steps at different heating rates and final decarbonation temperatures, while scanning electron microscope (SEM) was used to analyze the effect of temperature on evolution of morphological changes for particles of different fractions. It was found that sintering in the presence of carbon dioxide (CO2) could be triggered by agglomeration of CaO crystals, enhanced by CO2 adsorption that increases surface energy.",
publisher = "Elsevier, Amsterdam",
journal = "Thermochimica Acta",
title = "Thermo-oxidative evolution and physico-chemical characterization of seashell waste for application in commercial sectors",
volume = "686",
doi = "10.1016/j.tca.2020.178568"
}

Janković, B., Smičiklas, I. D., Manić, N., Mraković, A., Mandić, M., Veljović, Đ.,& Jović, M.. (2020). Thermo-oxidative evolution and physico-chemical characterization of seashell waste for application in commercial sectors. in Thermochimica Acta
Elsevier, Amsterdam., 686.
https://doi.org/10.1016/j.tca.2020.178568

Janković B, Smičiklas ID, Manić N, Mraković A, Mandić M, Veljović Đ, Jović M. Thermo-oxidative evolution and physico-chemical characterization of seashell waste for application in commercial sectors. in Thermochimica Acta. 2020;686.
doi:10.1016/j.tca.2020.178568 .

Janković, Bojan, Smičiklas, Ivana D., Manić, Nebojša, Mraković, Ana, Mandić, Milica, Veljović, Đorđe, Jović, Mihajlo, "Thermo-oxidative evolution and physico-chemical characterization of seashell waste for application in commercial sectors" in Thermochimica Acta, 686 (2020),
https://doi.org/10.1016/j.tca.2020.178568 . .

TY  - CONF
AU  - Lazić, Vesna
AU  - Mihajlovski, Katarina
AU  - Mraković, Ana
AU  - Nedeljković, Jovan M.
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/7325
AB  - Antibacterial and antifungal ability of silver nanoparticles (Ag NPs) supported by functionalized magnetite (Fe3O4) with 5-aminosalicylic acid (5-ASA) was tested against Gram-negative bacteria Escherichia coli, Gram-positive bacteria Staphylococcus aureus and yeast Candida albicans. Characterization of materials including transmission electron microscopy, X-ray diffraction analysis, and inductively coupled plasma optic emission spectroscopy technique followed each step during the course of nanocomposite preparation. The synthesized powder consists of 30-50 nm in size silver particles surrounded by clusters of smaller (~10 nm) Fe3O4 particles. The content of silver in the nanocomposite powder was found to be slightly above 40 wt.-%. Concentration-dependent and time-dependent bacterial reduction measurements in dark indicated that use of Ag NPs leads to the complete reduction of E. coli and S. aureus even at the concentration level of silver as low as 40 μg/mL. However, the negligible antifungal ability of synthesized nanocomposite was found against yeast C. albicans in the entire investigated concentration range (0.1-2.0 mg/mL of the nanocomposite, i.e., 40-800 μg/mL of silver). Complete inactivation of E. coli and S. aureus was achieved in five repeated cycles indicated that synthesized nanocomposite can perform under long-run working conditions. From the technological point of view, magnetic separation is the additional advantage of synthesized nanocomposite for potential use as an antibacterial agent.
PB  - Biomatsen
C3  - Book of Abstracts / 4th International Congress on Biomaterials & Biosensors (BIOMATSEN 2019), Oludeniz/Mugla - Turkey, May 12-18, 2019
T1  - Antimicrobial activity magnetite nanoparticles decorated with Ag Nps
SP  - 76
UR  - https://hdl.handle.net/21.15107/rcub_technorep_7325
ER  - 

@conference{
author = "Lazić, Vesna and Mihajlovski, Katarina and Mraković, Ana and Nedeljković, Jovan M.",
year = "2019",
abstract = "Antibacterial and antifungal ability of silver nanoparticles (Ag NPs) supported by functionalized magnetite (Fe3O4) with 5-aminosalicylic acid (5-ASA) was tested against Gram-negative bacteria Escherichia coli, Gram-positive bacteria Staphylococcus aureus and yeast Candida albicans. Characterization of materials including transmission electron microscopy, X-ray diffraction analysis, and inductively coupled plasma optic emission spectroscopy technique followed each step during the course of nanocomposite preparation. The synthesized powder consists of 30-50 nm in size silver particles surrounded by clusters of smaller (~10 nm) Fe3O4 particles. The content of silver in the nanocomposite powder was found to be slightly above 40 wt.-%. Concentration-dependent and time-dependent bacterial reduction measurements in dark indicated that use of Ag NPs leads to the complete reduction of E. coli and S. aureus even at the concentration level of silver as low as 40 μg/mL. However, the negligible antifungal ability of synthesized nanocomposite was found against yeast C. albicans in the entire investigated concentration range (0.1-2.0 mg/mL of the nanocomposite, i.e., 40-800 μg/mL of silver). Complete inactivation of E. coli and S. aureus was achieved in five repeated cycles indicated that synthesized nanocomposite can perform under long-run working conditions. From the technological point of view, magnetic separation is the additional advantage of synthesized nanocomposite for potential use as an antibacterial agent.",
publisher = "Biomatsen",
journal = "Book of Abstracts / 4th International Congress on Biomaterials & Biosensors (BIOMATSEN 2019), Oludeniz/Mugla - Turkey, May 12-18, 2019",
title = "Antimicrobial activity magnetite nanoparticles decorated with Ag Nps",
pages = "76",
url = "https://hdl.handle.net/21.15107/rcub_technorep_7325"
}

Lazić, V., Mihajlovski, K., Mraković, A.,& Nedeljković, J. M.. (2019). Antimicrobial activity magnetite nanoparticles decorated with Ag Nps. in Book of Abstracts / 4th International Congress on Biomaterials & Biosensors (BIOMATSEN 2019), Oludeniz/Mugla - Turkey, May 12-18, 2019
Biomatsen., 76.
https://hdl.handle.net/21.15107/rcub_technorep_7325

Lazić V, Mihajlovski K, Mraković A, Nedeljković JM. Antimicrobial activity magnetite nanoparticles decorated with Ag Nps. in Book of Abstracts / 4th International Congress on Biomaterials & Biosensors (BIOMATSEN 2019), Oludeniz/Mugla - Turkey, May 12-18, 2019. 2019;:76.
https://hdl.handle.net/21.15107/rcub_technorep_7325 .

Lazić, Vesna, Mihajlovski, Katarina, Mraković, Ana, Nedeljković, Jovan M., "Antimicrobial activity magnetite nanoparticles decorated with Ag Nps" in Book of Abstracts / 4th International Congress on Biomaterials & Biosensors (BIOMATSEN 2019), Oludeniz/Mugla - Turkey, May 12-18, 2019 (2019):76,
https://hdl.handle.net/21.15107/rcub_technorep_7325 .

TY  - JOUR
AU  - Milovanović, Stoja
AU  - Marković, Darka
AU  - Mraković, Ana
AU  - Kuska, Robert
AU  - Žižović, Irena
AU  - Frerich, Sulamith
AU  - Ivanović, Jasna
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4173
AB  - Amorphous, medical grade poly(D,L-lactic acid) (PLA) and poly(D,L-lactic-co-glycolic acid) (PLGA) were used to develop systems for controlled release of a natural bioactive substance - thymol. Supercritical carbon dioxide (scCO(2)) was successfully used both as an impregnation medium for thymol incorporation into the polymer matrix and a foaming agent in a single-step batch process. Impregnation of samples using low to moderate scCO(2) densities (273 kg/m(3) and 630 kg/m(3)) and short processing times (2 h and 4 h) enabled thymol loading of 0.920/0-6.62% and formation of microcellular foams upon system depressurization. Thymol effect on structural and thermal properties on foamed samples was proven by FTIR and DSC. The effect of CO2 under elevated pressure on the neat polymers was analysed by high pressure DSC. Foaming of polymers with lower molecular weight by CO2 of higher density yielded foams with smaller pores. All tested foams released thymol in a controlled manner in phosphate buffered saline (PBS) at 37 degrees C within 3 to 6 weeks. Higher loading and lower cell density favoured thymol release rate, while its concentration in PBS for the tested period depended on foam interaction with the medium. Representative PLGA foam sample with the highest thymol loading (6.62%) showed controlled thymol release within 72 h in mediums having pH values from 1.1 to 7.4.
PB  - Elsevier Science Bv, Amsterdam
T2  - Materials Science & Engineering C-Materials for Biological Applications
T1  - Supercritical CO2 - assisted production of PLA and PLGA foams for controlled thymol release
EP  - 404
SP  - 394
VL  - 99
DO  - 10.1016/j.msec.2019.01.106
ER  - 

@article{
author = "Milovanović, Stoja and Marković, Darka and Mraković, Ana and Kuska, Robert and Žižović, Irena and Frerich, Sulamith and Ivanović, Jasna",
year = "2019",
abstract = "Amorphous, medical grade poly(D,L-lactic acid) (PLA) and poly(D,L-lactic-co-glycolic acid) (PLGA) were used to develop systems for controlled release of a natural bioactive substance - thymol. Supercritical carbon dioxide (scCO(2)) was successfully used both as an impregnation medium for thymol incorporation into the polymer matrix and a foaming agent in a single-step batch process. Impregnation of samples using low to moderate scCO(2) densities (273 kg/m(3) and 630 kg/m(3)) and short processing times (2 h and 4 h) enabled thymol loading of 0.920/0-6.62% and formation of microcellular foams upon system depressurization. Thymol effect on structural and thermal properties on foamed samples was proven by FTIR and DSC. The effect of CO2 under elevated pressure on the neat polymers was analysed by high pressure DSC. Foaming of polymers with lower molecular weight by CO2 of higher density yielded foams with smaller pores. All tested foams released thymol in a controlled manner in phosphate buffered saline (PBS) at 37 degrees C within 3 to 6 weeks. Higher loading and lower cell density favoured thymol release rate, while its concentration in PBS for the tested period depended on foam interaction with the medium. Representative PLGA foam sample with the highest thymol loading (6.62%) showed controlled thymol release within 72 h in mediums having pH values from 1.1 to 7.4.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Materials Science & Engineering C-Materials for Biological Applications",
title = "Supercritical CO2 - assisted production of PLA and PLGA foams for controlled thymol release",
pages = "404-394",
volume = "99",
doi = "10.1016/j.msec.2019.01.106"
}

Milovanović, S., Marković, D., Mraković, A., Kuska, R., Žižović, I., Frerich, S.,& Ivanović, J.. (2019). Supercritical CO2 - assisted production of PLA and PLGA foams for controlled thymol release. in Materials Science & Engineering C-Materials for Biological Applications
Elsevier Science Bv, Amsterdam., 99, 394-404.
https://doi.org/10.1016/j.msec.2019.01.106

Milovanović S, Marković D, Mraković A, Kuska R, Žižović I, Frerich S, Ivanović J. Supercritical CO2 - assisted production of PLA and PLGA foams for controlled thymol release. in Materials Science & Engineering C-Materials for Biological Applications. 2019;99:394-404.
doi:10.1016/j.msec.2019.01.106 .

Milovanović, Stoja, Marković, Darka, Mraković, Ana, Kuska, Robert, Žižović, Irena, Frerich, Sulamith, Ivanović, Jasna, "Supercritical CO2 - assisted production of PLA and PLGA foams for controlled thymol release" in Materials Science & Engineering C-Materials for Biological Applications, 99 (2019):394-404,
https://doi.org/10.1016/j.msec.2019.01.106 . .

TY  - JOUR
AU  - Lazić, Vesna M.
AU  - Mihajlovski, Katarina
AU  - Mraković, Ana
AU  - Illés, Erzsébet
AU  - Stoiljković, Milovan
AU  - Ahrenkiel, Scott Phillip
AU  - Nedeljković, Jovan
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4259
AB  - Antibacterial and antifungal ability of silver nanoparticles (Ag NPs) supported by functionalized magnetite (Fe3O4) with 5-aminosalicylic acid (5-ASA) was tested against Gram-negative bacteria Escherichia coli, Gram-positive bacteria Staphylococcus aureus and yeast Candida albicans. Characterization of materials including transmission electron microscopy, X-ray diffraction analysis, and inductively coupled plasma optic emission spectroscopy technique followed each step during the course of nanocomposite preparation. The synthesized powder consists of 30-50nm in size silver particles surrounded by clusters of smaller (approximate to 10nm) Fe3O4 particles. The content of silver in the nanocomposite powder was found to be slightly above 40 wt.-%. Concentration-dependent and time-dependent bacterial reduction measurements in dark indicated that use of Ag NPs leads to the complete reduction of E. coli and S. aureus even at the concentration level of silver as low as 40 g/mL. However, the negligible antifungal ability of synthesized nanocomposite was found against yeast C. albicans in the entire investigated concentration range (0.1-2.0mg/mL of the nanocomposite, i.e., 40-800 g/mL of silver). Complete inactivation of E. coli and S. aureus was achieved in five repeated cycles indicated that synthesized nanocomposite can perform under long-run working conditions. From the technological point of view, magnetic separation is the additional advantage of synthesized nanocomposite for potential use as an antibacterial agent.
PB  - Wiley-VCH Verlag Gmbh, Weinheim
T2  - Chemistryselect
T1  - Antimicrobial activity of silver nanoparticles supported by magnetite
EP  - 4024
IS  - 14
SP  - 4018
VL  - 4
DO  - 10.1002/slct.201900628
ER  - 

@article{
author = "Lazić, Vesna M. and Mihajlovski, Katarina and Mraković, Ana and Illés, Erzsébet and Stoiljković, Milovan and Ahrenkiel, Scott Phillip and Nedeljković, Jovan",
year = "2019",
abstract = "Antibacterial and antifungal ability of silver nanoparticles (Ag NPs) supported by functionalized magnetite (Fe3O4) with 5-aminosalicylic acid (5-ASA) was tested against Gram-negative bacteria Escherichia coli, Gram-positive bacteria Staphylococcus aureus and yeast Candida albicans. Characterization of materials including transmission electron microscopy, X-ray diffraction analysis, and inductively coupled plasma optic emission spectroscopy technique followed each step during the course of nanocomposite preparation. The synthesized powder consists of 30-50nm in size silver particles surrounded by clusters of smaller (approximate to 10nm) Fe3O4 particles. The content of silver in the nanocomposite powder was found to be slightly above 40 wt.-%. Concentration-dependent and time-dependent bacterial reduction measurements in dark indicated that use of Ag NPs leads to the complete reduction of E. coli and S. aureus even at the concentration level of silver as low as 40 g/mL. However, the negligible antifungal ability of synthesized nanocomposite was found against yeast C. albicans in the entire investigated concentration range (0.1-2.0mg/mL of the nanocomposite, i.e., 40-800 g/mL of silver). Complete inactivation of E. coli and S. aureus was achieved in five repeated cycles indicated that synthesized nanocomposite can perform under long-run working conditions. From the technological point of view, magnetic separation is the additional advantage of synthesized nanocomposite for potential use as an antibacterial agent.",
publisher = "Wiley-VCH Verlag Gmbh, Weinheim",
journal = "Chemistryselect",
title = "Antimicrobial activity of silver nanoparticles supported by magnetite",
pages = "4024-4018",
number = "14",
volume = "4",
doi = "10.1002/slct.201900628"
}

Lazić, V. M., Mihajlovski, K., Mraković, A., Illés, E., Stoiljković, M., Ahrenkiel, S. P.,& Nedeljković, J.. (2019). Antimicrobial activity of silver nanoparticles supported by magnetite. in Chemistryselect
Wiley-VCH Verlag Gmbh, Weinheim., 4(14), 4018-4024.
https://doi.org/10.1002/slct.201900628

Lazić VM, Mihajlovski K, Mraković A, Illés E, Stoiljković M, Ahrenkiel SP, Nedeljković J. Antimicrobial activity of silver nanoparticles supported by magnetite. in Chemistryselect. 2019;4(14):4018-4024.
doi:10.1002/slct.201900628 .

Lazić, Vesna M., Mihajlovski, Katarina, Mraković, Ana, Illés, Erzsébet, Stoiljković, Milovan, Ahrenkiel, Scott Phillip, Nedeljković, Jovan, "Antimicrobial activity of silver nanoparticles supported by magnetite" in Chemistryselect, 4, no. 14 (2019):4018-4024,
https://doi.org/10.1002/slct.201900628 . .

TY  - JOUR
AU  - Egerić, Marija
AU  - Smičiklas, Ivana D.
AU  - Mraković, Ana
AU  - Jović, Mihajlo D.
AU  - Šljivić-Ivanović, Marija Z.
AU  - Antanasijević, Davor
AU  - Ristić, Mirjana
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4029
AB  - BACKGROUNDSeashell waste (SW) is rich in biogenic calcium carbonate and potentially can substitute geological sources in various applications, such as the separation of heavy metals and radionuclides from contaminated solutions. This study aims to compare SW sorption efficiency towards different chemical species (Cu2+, Zn2+, Pb2+ and Sr2+) and to evaluate the effects of various factors based on the experimental data and modeling approach. RESULTSThe reaction of SW with aqueous metal solutions is a combination of several processes that result in metal retention, Ca2+ release, and changes in pH. SW demonstrates variable selectivity for investigated cations, depending on their concentrations and reaction times. Maximum sorption capacities declined in the order Zn2+  gt  Pb2+ approximate to Sr2+  gt  Cu2+. The model based on general regression neural network (GRNN) architecture was developed, which enabled prediction of removal efficiency taking into account the process specific, metal specific parameters and their non-linear interactions. Initial concentration and covalent radius of a cation exhibit the highest, while the initial pH the lowest significance. CONCLUSIONEcological problems caused by SW accumulation in coastal areas could be mitigated by mastering technologies for their practical utilization. The results obtained facilitate the understanding of cationic pollutants removal by SW in the range of experimental conditions, while the GRNN approach demonstrates advantages in modeling complex sorption processes.
PB  - Wiley, Hoboken
T2  - Journal of Chemical Technology and Biotechnology
T1  - Experimental and theoretical consideration of the factors influencing cationic pollutants retention by seashell waste
EP  - 1487
IS  - 5
SP  - 1477
VL  - 93
DO  - 10.1002/jctb.5516
ER  - 

@article{
author = "Egerić, Marija and Smičiklas, Ivana D. and Mraković, Ana and Jović, Mihajlo D. and Šljivić-Ivanović, Marija Z. and Antanasijević, Davor and Ristić, Mirjana",
year = "2018",
abstract = "BACKGROUNDSeashell waste (SW) is rich in biogenic calcium carbonate and potentially can substitute geological sources in various applications, such as the separation of heavy metals and radionuclides from contaminated solutions. This study aims to compare SW sorption efficiency towards different chemical species (Cu2+, Zn2+, Pb2+ and Sr2+) and to evaluate the effects of various factors based on the experimental data and modeling approach. RESULTSThe reaction of SW with aqueous metal solutions is a combination of several processes that result in metal retention, Ca2+ release, and changes in pH. SW demonstrates variable selectivity for investigated cations, depending on their concentrations and reaction times. Maximum sorption capacities declined in the order Zn2+  gt  Pb2+ approximate to Sr2+  gt  Cu2+. The model based on general regression neural network (GRNN) architecture was developed, which enabled prediction of removal efficiency taking into account the process specific, metal specific parameters and their non-linear interactions. Initial concentration and covalent radius of a cation exhibit the highest, while the initial pH the lowest significance. CONCLUSIONEcological problems caused by SW accumulation in coastal areas could be mitigated by mastering technologies for their practical utilization. The results obtained facilitate the understanding of cationic pollutants removal by SW in the range of experimental conditions, while the GRNN approach demonstrates advantages in modeling complex sorption processes.",
publisher = "Wiley, Hoboken",
journal = "Journal of Chemical Technology and Biotechnology",
title = "Experimental and theoretical consideration of the factors influencing cationic pollutants retention by seashell waste",
pages = "1487-1477",
number = "5",
volume = "93",
doi = "10.1002/jctb.5516"
}

Egerić, M., Smičiklas, I. D., Mraković, A., Jović, M. D., Šljivić-Ivanović, M. Z., Antanasijević, D.,& Ristić, M.. (2018). Experimental and theoretical consideration of the factors influencing cationic pollutants retention by seashell waste. in Journal of Chemical Technology and Biotechnology
Wiley, Hoboken., 93(5), 1477-1487.
https://doi.org/10.1002/jctb.5516

Egerić M, Smičiklas ID, Mraković A, Jović MD, Šljivić-Ivanović MZ, Antanasijević D, Ristić M. Experimental and theoretical consideration of the factors influencing cationic pollutants retention by seashell waste. in Journal of Chemical Technology and Biotechnology. 2018;93(5):1477-1487.
doi:10.1002/jctb.5516 .

Egerić, Marija, Smičiklas, Ivana D., Mraković, Ana, Jović, Mihajlo D., Šljivić-Ivanović, Marija Z., Antanasijević, Davor, Ristić, Mirjana, "Experimental and theoretical consideration of the factors influencing cationic pollutants retention by seashell waste" in Journal of Chemical Technology and Biotechnology, 93, no. 5 (2018):1477-1487,
https://doi.org/10.1002/jctb.5516 . .

TY  - JOUR
AU  - Egerić, Marija
AU  - Smičiklas, Ivana D.
AU  - Mraković, Ana
AU  - Jović, Mihajlo D.
AU  - Šljivić-Ivanović, Marija Z.
AU  - Sokolović, Jovica
AU  - Ristić, Mirjana
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3943
AB  - The limestone and lime are agents widely used for separation of toxic metals from contaminated water. To reduce the exploitation of natural limestone deposits, appropriate replacements are sought out among the waste materials and by-products. Seashells, accumulated as an abundant waste in coastal areas, have high content of calcium carbonate and so far have shown high efficiency in neutralization and metal immobilization processes. In this study, the removal of Cu(II) ions was investigated using grounded seashell waste (a) without any pretreatment and (b) exposed to temperature treatment in the range 300-900 degrees C. The influence of temperature on the mineral phase transformation, solution pH and the removal efficiency of Cu(II) ions was monitored. Treatments at T  gt  500 degrees C exhibit positive effect on Cu(II) separation, with the samples partially or completely converted to calcium oxide being the most effective in the entire Cu(II) concentration range (6.34-639 mg/L). The efficiency of Cu(II) removal was largely associated with the effect on solution pH. The two level full factorial design was used to evaluate the significance of seashell composition (calcium carbonate vs. calcium oxide), granulation, dose and contact time, on the separation of Cu(II) and other cationic pollutants (Fe, Zn, Ni and Pb) from wastewater. The seashell dose and granulation, as well as their interaction, were generally the most influential factors. The variations in the levels of investigated factors had a substantial effect on the process through the indirect effect onto the solution pH. More than 99% of Cu(II) ions were separated at pH  gt  7, while the final pH range 8.2-12.2 was found optimal for total metal separation (97.6-98.9%).
PB  - Desalination Publ, Hopkinton
T2  - Desalination and Water Treatment
T1  - Separation of Cu(II) ions from synthetic solutions and wastewater by raw and calcined seashell waste
EP  - 214
SP  - 205
VL  - 132
DO  - 10.5004/dwt.2018.23131
ER  - 

@article{
author = "Egerić, Marija and Smičiklas, Ivana D. and Mraković, Ana and Jović, Mihajlo D. and Šljivić-Ivanović, Marija Z. and Sokolović, Jovica and Ristić, Mirjana",
year = "2018",
abstract = "The limestone and lime are agents widely used for separation of toxic metals from contaminated water. To reduce the exploitation of natural limestone deposits, appropriate replacements are sought out among the waste materials and by-products. Seashells, accumulated as an abundant waste in coastal areas, have high content of calcium carbonate and so far have shown high efficiency in neutralization and metal immobilization processes. In this study, the removal of Cu(II) ions was investigated using grounded seashell waste (a) without any pretreatment and (b) exposed to temperature treatment in the range 300-900 degrees C. The influence of temperature on the mineral phase transformation, solution pH and the removal efficiency of Cu(II) ions was monitored. Treatments at T  gt  500 degrees C exhibit positive effect on Cu(II) separation, with the samples partially or completely converted to calcium oxide being the most effective in the entire Cu(II) concentration range (6.34-639 mg/L). The efficiency of Cu(II) removal was largely associated with the effect on solution pH. The two level full factorial design was used to evaluate the significance of seashell composition (calcium carbonate vs. calcium oxide), granulation, dose and contact time, on the separation of Cu(II) and other cationic pollutants (Fe, Zn, Ni and Pb) from wastewater. The seashell dose and granulation, as well as their interaction, were generally the most influential factors. The variations in the levels of investigated factors had a substantial effect on the process through the indirect effect onto the solution pH. More than 99% of Cu(II) ions were separated at pH  gt  7, while the final pH range 8.2-12.2 was found optimal for total metal separation (97.6-98.9%).",
publisher = "Desalination Publ, Hopkinton",
journal = "Desalination and Water Treatment",
title = "Separation of Cu(II) ions from synthetic solutions and wastewater by raw and calcined seashell waste",
pages = "214-205",
volume = "132",
doi = "10.5004/dwt.2018.23131"
}

Egerić, M., Smičiklas, I. D., Mraković, A., Jović, M. D., Šljivić-Ivanović, M. Z., Sokolović, J.,& Ristić, M.. (2018). Separation of Cu(II) ions from synthetic solutions and wastewater by raw and calcined seashell waste. in Desalination and Water Treatment
Desalination Publ, Hopkinton., 132, 205-214.
https://doi.org/10.5004/dwt.2018.23131

Egerić M, Smičiklas ID, Mraković A, Jović MD, Šljivić-Ivanović MZ, Sokolović J, Ristić M. Separation of Cu(II) ions from synthetic solutions and wastewater by raw and calcined seashell waste. in Desalination and Water Treatment. 2018;132:205-214.
doi:10.5004/dwt.2018.23131 .

Egerić, Marija, Smičiklas, Ivana D., Mraković, Ana, Jović, Mihajlo D., Šljivić-Ivanović, Marija Z., Sokolović, Jovica, Ristić, Mirjana, "Separation of Cu(II) ions from synthetic solutions and wastewater by raw and calcined seashell waste" in Desalination and Water Treatment, 132 (2018):205-214,
https://doi.org/10.5004/dwt.2018.23131 . .

TY  - JOUR
AU  - Knežević, Nikola
AU  - Jimenez, Chiara Mauriello
AU  - Albino, Martin
AU  - Vukadinović, Aleksandar
AU  - Mraković, Ana
AU  - Illés, Erzsébet
AU  - Janaćković, Đorđe
AU  - Durand, Jean-Olivier
AU  - Sangregorio, Claudio
AU  - Peddis, Davide
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3626
AB  - Initial results en route toward construction of complex magnetic core-shell silica and organosilica nanotheranostics are presented. Magnetite nanoparticles are synthesized by three different methods and embedded within mesoporous silica and organosilica frameworks by different surfactant-templated procedures to produce three types of core-shell nanoparticles. Magnetite nanoparticles (15 nm in diameter) are embedded within mesoporous silica nanoparticles to produce cell-like material with predominantly one magnetite nuclei-resembling core per nanoparticle, with final particle diameter of ca. 150 nm, specific surface area of 573 m(2)/g and hexagonally structured tubular pores (2.6 nm predominant diameter), extended throughout the volume of nanoparticles. Two forms of spherical core-shell nanoparticles composed of magnetite cores embedded within mesoporous organosilica shells are also obtained by employing ethylene and ethane bridged organobisalkoxysilane precursors. The obtained nanomaterials are characterized by high surface area (978 and 820 m(2)/g), tubular pore morphology (2 and 2.8 nm predominant pore diameters), different diameters (386 and 100-200 nm), in case of ethylene- and ethane-composed organosilica shells, respectively. Different degree of agglomeration of magnetite nanoparticles was also observed in the obtained materials, and in the case of utilization of surfactant-pre-stabilized magnetite nanoparticles for the syntheses, their uniform and non-agglomerated distribution within the shells was noted.
PB  - Cambridge Univ Press, New York
T2  - Mrs Advances
T1  - Synthesis and Characterization of Core-Shell Magnetic Mesoporous Silica and Organosilica Nanostructures
EP  - 1045
IS  - 19-20
SP  - 1037
VL  - 2
DO  - 10.1557/adv.2017.69
ER  - 

@article{
author = "Knežević, Nikola and Jimenez, Chiara Mauriello and Albino, Martin and Vukadinović, Aleksandar and Mraković, Ana and Illés, Erzsébet and Janaćković, Đorđe and Durand, Jean-Olivier and Sangregorio, Claudio and Peddis, Davide",
year = "2017",
abstract = "Initial results en route toward construction of complex magnetic core-shell silica and organosilica nanotheranostics are presented. Magnetite nanoparticles are synthesized by three different methods and embedded within mesoporous silica and organosilica frameworks by different surfactant-templated procedures to produce three types of core-shell nanoparticles. Magnetite nanoparticles (15 nm in diameter) are embedded within mesoporous silica nanoparticles to produce cell-like material with predominantly one magnetite nuclei-resembling core per nanoparticle, with final particle diameter of ca. 150 nm, specific surface area of 573 m(2)/g and hexagonally structured tubular pores (2.6 nm predominant diameter), extended throughout the volume of nanoparticles. Two forms of spherical core-shell nanoparticles composed of magnetite cores embedded within mesoporous organosilica shells are also obtained by employing ethylene and ethane bridged organobisalkoxysilane precursors. The obtained nanomaterials are characterized by high surface area (978 and 820 m(2)/g), tubular pore morphology (2 and 2.8 nm predominant pore diameters), different diameters (386 and 100-200 nm), in case of ethylene- and ethane-composed organosilica shells, respectively. Different degree of agglomeration of magnetite nanoparticles was also observed in the obtained materials, and in the case of utilization of surfactant-pre-stabilized magnetite nanoparticles for the syntheses, their uniform and non-agglomerated distribution within the shells was noted.",
publisher = "Cambridge Univ Press, New York",
journal = "Mrs Advances",
title = "Synthesis and Characterization of Core-Shell Magnetic Mesoporous Silica and Organosilica Nanostructures",
pages = "1045-1037",
number = "19-20",
volume = "2",
doi = "10.1557/adv.2017.69"
}

Knežević, N., Jimenez, C. M., Albino, M., Vukadinović, A., Mraković, A., Illés, E., Janaćković, Đ., Durand, J., Sangregorio, C.,& Peddis, D.. (2017). Synthesis and Characterization of Core-Shell Magnetic Mesoporous Silica and Organosilica Nanostructures. in Mrs Advances
Cambridge Univ Press, New York., 2(19-20), 1037-1045.
https://doi.org/10.1557/adv.2017.69

Knežević N, Jimenez CM, Albino M, Vukadinović A, Mraković A, Illés E, Janaćković Đ, Durand J, Sangregorio C, Peddis D. Synthesis and Characterization of Core-Shell Magnetic Mesoporous Silica and Organosilica Nanostructures. in Mrs Advances. 2017;2(19-20):1037-1045.
doi:10.1557/adv.2017.69 .

Knežević, Nikola, Jimenez, Chiara Mauriello, Albino, Martin, Vukadinović, Aleksandar, Mraković, Ana, Illés, Erzsébet, Janaćković, Đorđe, Durand, Jean-Olivier, Sangregorio, Claudio, Peddis, Davide, "Synthesis and Characterization of Core-Shell Magnetic Mesoporous Silica and Organosilica Nanostructures" in Mrs Advances, 2, no. 19-20 (2017):1037-1045,
https://doi.org/10.1557/adv.2017.69 . .

TY  - JOUR
AU  - Lukić, Miodrag J.
AU  - Sezen, Meltem
AU  - Veljović, Đorđe
AU  - Mraković, Ana
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3590
AB  - The densification behavior of hydroxyapatite nanorods prepared by chemical precipitation method in open reactor conditions was investigated by application of different heating rates. The non-isothermal processing was performed with 2, 10, and 50 degrees C/min up to 1200 degrees C and yielded fully dense ceramics. The implementation of the higher heating rate provided grain size refinement from micrometer level for the slowest ramp, down to 250 nm in the case of processing with 50 degrees C/min, without any drawbacks regarding final density. The relative amount of retained structural hydroxyl groups in sintered ceramics was gradually increased with the heating rate. Furthermore, the qualitative level of optical translucency was increased with a higher heating rate which can be explained by the beneficial alignment of HAp nanorods during the fast heating rate processing, achieved microstructural refinement, and higher amount of structural hydroxyl groups.
PB  - Elsevier Science Bv, Amsterdam
T2  - Materials Letters
T1  - A facile route for hydroxyapatite densification with an increased heating rate
EP  - 15
SP  - 12
VL  - 207
DO  - 10.1016/j.matlet.2017.07.020
ER  - 

@article{
author = "Lukić, Miodrag J. and Sezen, Meltem and Veljović, Đorđe and Mraković, Ana",
year = "2017",
abstract = "The densification behavior of hydroxyapatite nanorods prepared by chemical precipitation method in open reactor conditions was investigated by application of different heating rates. The non-isothermal processing was performed with 2, 10, and 50 degrees C/min up to 1200 degrees C and yielded fully dense ceramics. The implementation of the higher heating rate provided grain size refinement from micrometer level for the slowest ramp, down to 250 nm in the case of processing with 50 degrees C/min, without any drawbacks regarding final density. The relative amount of retained structural hydroxyl groups in sintered ceramics was gradually increased with the heating rate. Furthermore, the qualitative level of optical translucency was increased with a higher heating rate which can be explained by the beneficial alignment of HAp nanorods during the fast heating rate processing, achieved microstructural refinement, and higher amount of structural hydroxyl groups.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Materials Letters",
title = "A facile route for hydroxyapatite densification with an increased heating rate",
pages = "15-12",
volume = "207",
doi = "10.1016/j.matlet.2017.07.020"
}

Lukić, M. J., Sezen, M., Veljović, Đ.,& Mraković, A.. (2017). A facile route for hydroxyapatite densification with an increased heating rate. in Materials Letters
Elsevier Science Bv, Amsterdam., 207, 12-15.
https://doi.org/10.1016/j.matlet.2017.07.020

Lukić MJ, Sezen M, Veljović Đ, Mraković A. A facile route for hydroxyapatite densification with an increased heating rate. in Materials Letters. 2017;207:12-15.
doi:10.1016/j.matlet.2017.07.020 .

Lukić, Miodrag J., Sezen, Meltem, Veljović, Đorđe, Mraković, Ana, "A facile route for hydroxyapatite densification with an increased heating rate" in Materials Letters, 207 (2017):12-15,
https://doi.org/10.1016/j.matlet.2017.07.020 . .