TY  - JOUR
AU  - Radovanović, Dragana
AU  - Dikić, Jelena
AU  - Štulović, Marija
AU  - Anđić, Zoran
AU  - Kamberović, Željko
AU  - Jevtić, Sanja
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6872
AB  - Low-cost   and   easily   available   natural   zeolite   is   a promising   adsorbent   for   metal   ions   removal   in   wastewater treatment.  The  possibility  of  using  zeolitic  tuff  from  Serbia  in  the form  of  Na-enriched  natural  zeolite  (Na-Z)  for  the adsorption  of Pb2+, Zn2+, Cu2+, and Ni2+ions from wastewater was investigated in the  presented  paper.  The  research  included  Na-Z  characterization and   determination   of   adsorption   kinetics   in   individual   ion adsorption tests using Weber-Morris intraparticle diffusion model, non-linear  pseudo-first-order  (PFO),  pseudo-second-order  (PSO) and mixed-order (MO) kinetic models. The results indicate that the adsorption processes of metal ions on Na-Z are complex processes dominated  by  multiple  rate-limiting  mechanisms  and  best  defined by the MO model. The mechanisms of ion diffusion and adsorption to active sites are equally represented in the Pb2+adsorption process. The  mechanism  of  ion  adsorption  on  the  active  sites  is  the  rate-limiting step in the Zn2+adsorption process, while in the case of the Cu2+and  Ni2+adsorption  ion  diffusion  is  the  rate-limiting  kinetic mechanism. Within the MO model, the PFO rate (external/internal diffusion)  and  the  PSO  rate  (adsorption  on  active  sites)  were calculated and results wereapplied to a multicomponent wastewater sample in order to determine and explain the adsorption efficiency in wastewater treatment. The results show that the rate of adsorption of  individual  metal  ions  and  the  efficiency  of  ion  removal  from  a multicomponent   wastewater   sample   are   influenced   by   several factors including the radius of the hydrated ion and the free energy of hydration. The achieved removal of metal ions by Na-Z is Pb2+(89%)  >  Cu2+(72%)  >  Zn2+(61%)  >  Ni2+(58%)  and  defines  Na-enriched  naturalzeolite  as  an  effective  adsorbent  in  wastewater treatment.
PB  - The Netherlands Press
T2  - Metallurgical and Materials Engineering
T1  - Sorption of Pb2+, Zn2+, Cu2+ and Ni2+ Ions on Na-enriched Natural Zeolite for Wastewater Treatment Process: A Kinetic Approach
EP  - 35
IS  - 3
SP  - 20
VL  - 29
DO  - 10.56801/MME1007
ER  - 

@article{
author = "Radovanović, Dragana and Dikić, Jelena and Štulović, Marija and Anđić, Zoran and Kamberović, Željko and Jevtić, Sanja",
year = "2023",
abstract = "Low-cost   and   easily   available   natural   zeolite   is   a promising   adsorbent   for   metal   ions   removal   in   wastewater treatment.  The  possibility  of  using  zeolitic  tuff  from  Serbia  in  the form  of  Na-enriched  natural  zeolite  (Na-Z)  for  the adsorption  of Pb2+, Zn2+, Cu2+, and Ni2+ions from wastewater was investigated in the  presented  paper.  The  research  included  Na-Z  characterization and   determination   of   adsorption   kinetics   in   individual   ion adsorption tests using Weber-Morris intraparticle diffusion model, non-linear  pseudo-first-order  (PFO),  pseudo-second-order  (PSO) and mixed-order (MO) kinetic models. The results indicate that the adsorption processes of metal ions on Na-Z are complex processes dominated  by  multiple  rate-limiting  mechanisms  and  best  defined by the MO model. The mechanisms of ion diffusion and adsorption to active sites are equally represented in the Pb2+adsorption process. The  mechanism  of  ion  adsorption  on  the  active  sites  is  the  rate-limiting step in the Zn2+adsorption process, while in the case of the Cu2+and  Ni2+adsorption  ion  diffusion  is  the  rate-limiting  kinetic mechanism. Within the MO model, the PFO rate (external/internal diffusion)  and  the  PSO  rate  (adsorption  on  active  sites)  were calculated and results wereapplied to a multicomponent wastewater sample in order to determine and explain the adsorption efficiency in wastewater treatment. The results show that the rate of adsorption of  individual  metal  ions  and  the  efficiency  of  ion  removal  from  a multicomponent   wastewater   sample   are   influenced   by   several factors including the radius of the hydrated ion and the free energy of hydration. The achieved removal of metal ions by Na-Z is Pb2+(89%)  >  Cu2+(72%)  >  Zn2+(61%)  >  Ni2+(58%)  and  defines  Na-enriched  naturalzeolite  as  an  effective  adsorbent  in  wastewater treatment.",
publisher = "The Netherlands Press",
journal = "Metallurgical and Materials Engineering",
title = "Sorption of Pb2+, Zn2+, Cu2+ and Ni2+ Ions on Na-enriched Natural Zeolite for Wastewater Treatment Process: A Kinetic Approach",
pages = "35-20",
number = "3",
volume = "29",
doi = "10.56801/MME1007"
}

Radovanović, D., Dikić, J., Štulović, M., Anđić, Z., Kamberović, Ž.,& Jevtić, S.. (2023). Sorption of Pb2+, Zn2+, Cu2+ and Ni2+ Ions on Na-enriched Natural Zeolite for Wastewater Treatment Process: A Kinetic Approach. in Metallurgical and Materials Engineering
The Netherlands Press., 29(3), 20-35.
https://doi.org/10.56801/MME1007

Radovanović D, Dikić J, Štulović M, Anđić Z, Kamberović Ž, Jevtić S. Sorption of Pb2+, Zn2+, Cu2+ and Ni2+ Ions on Na-enriched Natural Zeolite for Wastewater Treatment Process: A Kinetic Approach. in Metallurgical and Materials Engineering. 2023;29(3):20-35.
doi:10.56801/MME1007 .

Radovanović, Dragana, Dikić, Jelena, Štulović, Marija, Anđić, Zoran, Kamberović, Željko, Jevtić, Sanja, "Sorption of Pb2+, Zn2+, Cu2+ and Ni2+ Ions on Na-enriched Natural Zeolite for Wastewater Treatment Process: A Kinetic Approach" in Metallurgical and Materials Engineering, 29, no. 3 (2023):20-35,
https://doi.org/10.56801/MME1007 . .

TY  - JOUR
AU  - Nikolić, Vesna
AU  - Đokić, Jovana
AU  - Kamberović, Željko
AU  - Marinković, Aleksandar
AU  - Jevtić, Sanja
AU  - Anđić, Zoran
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5192
AB  - The aim of this study was to investigate a possibility of synthesis of porous ceramics with controlled open porosity, which could be used as sorbents and catalyst supports. Two organic additives were used to obtain open porosity: polystyrene beads and cellulose fibers, which are mixed with kaolin clay powder and the appropriate water content. Samples were sintered at 1050 oC for 1 h. Characterization of the obtained products included X-ray powder diffraction analysis (XRPD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and elemental CHNS analysis. In addition, porosity was examined by quantification of visual information. The specific surface areas were determined by the Brunauer–Emmett–Teller (BET) method. Also, density and compressive strength of the obtained samples were assessed. It was determined that by sintering, the organic component completely leaves the system. For samples prepared with polystyrene beads and with cellulose fibers, satisfactory mechanical properties were obtained: compressive strengths were 1.42 and 1.56 MPa, respectively. It was noted that significantly higher open porosity was obtained by using polystyrene beads as a sacrificial template (porosity of ~56 %) instead of cellulose fibers (porosity of ~6 %).
T2  - Hemijska industrija
T1  - Investigating possibilities for synthesis of novel sorbents and catalyst carriers based on ceramics with controlled open porosity
T1  - Ispitivanje mogućnosti sinteze inovativnih sorbenata i nosača katalizatora na bazi keramike kontrolisane otvorene poroznosti
EP  - 95
IS  - 2
SP  - 87
VL  - 76
DO  - 10.2298/HEMIND210809005N
ER  - 

@article{
author = "Nikolić, Vesna and Đokić, Jovana and Kamberović, Željko and Marinković, Aleksandar and Jevtić, Sanja and Anđić, Zoran",
year = "2022",
abstract = "The aim of this study was to investigate a possibility of synthesis of porous ceramics with controlled open porosity, which could be used as sorbents and catalyst supports. Two organic additives were used to obtain open porosity: polystyrene beads and cellulose fibers, which are mixed with kaolin clay powder and the appropriate water content. Samples were sintered at 1050 oC for 1 h. Characterization of the obtained products included X-ray powder diffraction analysis (XRPD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and elemental CHNS analysis. In addition, porosity was examined by quantification of visual information. The specific surface areas were determined by the Brunauer–Emmett–Teller (BET) method. Also, density and compressive strength of the obtained samples were assessed. It was determined that by sintering, the organic component completely leaves the system. For samples prepared with polystyrene beads and with cellulose fibers, satisfactory mechanical properties were obtained: compressive strengths were 1.42 and 1.56 MPa, respectively. It was noted that significantly higher open porosity was obtained by using polystyrene beads as a sacrificial template (porosity of ~56 %) instead of cellulose fibers (porosity of ~6 %).",
journal = "Hemijska industrija",
title = "Investigating possibilities for synthesis of novel sorbents and catalyst carriers based on ceramics with controlled open porosity, Ispitivanje mogućnosti sinteze inovativnih sorbenata i nosača katalizatora na bazi keramike kontrolisane otvorene poroznosti",
pages = "95-87",
number = "2",
volume = "76",
doi = "10.2298/HEMIND210809005N"
}

Nikolić, V., Đokić, J., Kamberović, Ž., Marinković, A., Jevtić, S.,& Anđić, Z.. (2022). Investigating possibilities for synthesis of novel sorbents and catalyst carriers based on ceramics with controlled open porosity. in Hemijska industrija, 76(2), 87-95.
https://doi.org/10.2298/HEMIND210809005N

Nikolić V, Đokić J, Kamberović Ž, Marinković A, Jevtić S, Anđić Z. Investigating possibilities for synthesis of novel sorbents and catalyst carriers based on ceramics with controlled open porosity. in Hemijska industrija. 2022;76(2):87-95.
doi:10.2298/HEMIND210809005N .

Nikolić, Vesna, Đokić, Jovana, Kamberović, Željko, Marinković, Aleksandar, Jevtić, Sanja, Anđić, Zoran, "Investigating possibilities for synthesis of novel sorbents and catalyst carriers based on ceramics with controlled open porosity" in Hemijska industrija, 76, no. 2 (2022):87-95,
https://doi.org/10.2298/HEMIND210809005N . .

TY  - JOUR
AU  - Marković, Maja D.
AU  - Panić, Vesna V.
AU  - Savić, Sanja I.
AU  - Ugrinović, Vukašin Đ.
AU  - Pjanović, Rada V.
AU  - Spasojević, Milica M.
AU  - Spasojević, Pavle M.
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5092
AB  - Materials sensitive to external stimuli are recognized as safe and effective tool able to respond to specific demands in the therapy of various diseases. Thermo sensitive hydrogels based on poly(N-isopropylacrylamide) (P(NIPAAM)) are widely investigated for targeted drug delivery. Still, the abundance of the stimuli in the human body often requires more than one responsive group able to act simultaneously to achieve optimal therapeutic effects. Due to its pH sensitivity and bio-based production, crotonic acid (CA) was a monomer of choice for preparation of eco-friendly copolymer hydrogels based on NIPAAM and CA (P(NIPAAMcoCA)), which turned to be thermo and pH sensitive at the same time. The potential of the P(NIPAAMcoCA) system for encapsulation and controlled release of drugs with different solubility was investigated engaging water-soluble lidocaine hydrochloride and poorly water-soluble ibuprofen as model drugs. The hydrogels were characterized by various technics: FTIR, DSC, SEM and single compressive tests, while swelling behavior and controlled release of the drugs were analyzed with respect to the CA amount in two environments with different pH values at 25 °C and 37 °C. It was demonstrated that due to their dual responsiveness the P(NIPAAMcoCA) hydrogels have potential for controlled release of drugs with different solubility.
PB  - Elsevier
T2  - Microporous and Mesoporous Materials
T1  - Biobased thermo/pH sensitive poly(N-isopropylacrylamide-co-crotonic acid) hydrogels for targeted drug delivery
SP  - 111817
VL  - 335
DO  - 10.1016/j.micromeso.2022.111817
ER  - 

@article{
author = "Marković, Maja D. and Panić, Vesna V. and Savić, Sanja I. and Ugrinović, Vukašin Đ. and Pjanović, Rada V. and Spasojević, Milica M. and Spasojević, Pavle M.",
year = "2022",
abstract = "Materials sensitive to external stimuli are recognized as safe and effective tool able to respond to specific demands in the therapy of various diseases. Thermo sensitive hydrogels based on poly(N-isopropylacrylamide) (P(NIPAAM)) are widely investigated for targeted drug delivery. Still, the abundance of the stimuli in the human body often requires more than one responsive group able to act simultaneously to achieve optimal therapeutic effects. Due to its pH sensitivity and bio-based production, crotonic acid (CA) was a monomer of choice for preparation of eco-friendly copolymer hydrogels based on NIPAAM and CA (P(NIPAAMcoCA)), which turned to be thermo and pH sensitive at the same time. The potential of the P(NIPAAMcoCA) system for encapsulation and controlled release of drugs with different solubility was investigated engaging water-soluble lidocaine hydrochloride and poorly water-soluble ibuprofen as model drugs. The hydrogels were characterized by various technics: FTIR, DSC, SEM and single compressive tests, while swelling behavior and controlled release of the drugs were analyzed with respect to the CA amount in two environments with different pH values at 25 °C and 37 °C. It was demonstrated that due to their dual responsiveness the P(NIPAAMcoCA) hydrogels have potential for controlled release of drugs with different solubility.",
publisher = "Elsevier",
journal = "Microporous and Mesoporous Materials",
title = "Biobased thermo/pH sensitive poly(N-isopropylacrylamide-co-crotonic acid) hydrogels for targeted drug delivery",
pages = "111817",
volume = "335",
doi = "10.1016/j.micromeso.2022.111817"
}

Marković, M. D., Panić, V. V., Savić, S. I., Ugrinović, V. Đ., Pjanović, R. V., Spasojević, M. M.,& Spasojević, P. M.. (2022). Biobased thermo/pH sensitive poly(N-isopropylacrylamide-co-crotonic acid) hydrogels for targeted drug delivery. in Microporous and Mesoporous Materials
Elsevier., 335, 111817.
https://doi.org/10.1016/j.micromeso.2022.111817

Marković MD, Panić VV, Savić SI, Ugrinović VĐ, Pjanović RV, Spasojević MM, Spasojević PM. Biobased thermo/pH sensitive poly(N-isopropylacrylamide-co-crotonic acid) hydrogels for targeted drug delivery. in Microporous and Mesoporous Materials. 2022;335:111817.
doi:10.1016/j.micromeso.2022.111817 .

Marković, Maja D., Panić, Vesna V., Savić, Sanja I., Ugrinović, Vukašin Đ., Pjanović, Rada V., Spasojević, Milica M., Spasojević, Pavle M., "Biobased thermo/pH sensitive poly(N-isopropylacrylamide-co-crotonic acid) hydrogels for targeted drug delivery" in Microporous and Mesoporous Materials, 335 (2022):111817,
https://doi.org/10.1016/j.micromeso.2022.111817 . .

TY  - JOUR
AU  - Pantić, Olga
AU  - Spasojević, Milica
AU  - Džunuzović, Enis
AU  - Nikolić, Marija S.
AU  - Savić, Sanja
AU  - Marković, Maja
AU  - Spasojević, Pavle
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5160
AB  - The scope of the present study was to prepare fully bio-based unsaturated polyester resins (UPRs) with comparable properties to the commercial formulations. The focus was set on the determination of the optimal prepolymer formulation using the same set of diacids (itaconic and succinic acid) and different diols (propylene glycol, isosorbide and neopentyl glycol) or its equimolar mixtures, keeping the fixed molar ratio of 1:1:2.1 in all feed compositions. Instead of commonly used styrene, bio-based dimethyl itaconate was used as a reactive diluent (RD). The rheology of the obtained resins was studied in detail. The effect of the used diol on structural (FTIR), thermal (DSC), thermomechanical (DMA), and mechanical (tensile) properties was explained. The properties of UPRs were found to be highly dependent on the diol used in the prepolymer formulation. The UPR with an equimolar ratio of propylene glycol and neopentyl glycol was shown to be the most promising candidate to compete with the commercial petroleum-based resins.
PB  - MDPI
T2  - Polymers
T1  - The Effect of Glycol Derivatives on the Properties of Bio-Based Unsaturated Polyesters
IS  - 15
SP  - 2970
VL  - 14
DO  - https://doi.org/10.3390/polym14152970
ER  - 

@article{
author = "Pantić, Olga and Spasojević, Milica and Džunuzović, Enis and Nikolić, Marija S. and Savić, Sanja and Marković, Maja and Spasojević, Pavle",
year = "2022",
abstract = "The scope of the present study was to prepare fully bio-based unsaturated polyester resins (UPRs) with comparable properties to the commercial formulations. The focus was set on the determination of the optimal prepolymer formulation using the same set of diacids (itaconic and succinic acid) and different diols (propylene glycol, isosorbide and neopentyl glycol) or its equimolar mixtures, keeping the fixed molar ratio of 1:1:2.1 in all feed compositions. Instead of commonly used styrene, bio-based dimethyl itaconate was used as a reactive diluent (RD). The rheology of the obtained resins was studied in detail. The effect of the used diol on structural (FTIR), thermal (DSC), thermomechanical (DMA), and mechanical (tensile) properties was explained. The properties of UPRs were found to be highly dependent on the diol used in the prepolymer formulation. The UPR with an equimolar ratio of propylene glycol and neopentyl glycol was shown to be the most promising candidate to compete with the commercial petroleum-based resins.",
publisher = "MDPI",
journal = "Polymers",
title = "The Effect of Glycol Derivatives on the Properties of Bio-Based Unsaturated Polyesters",
number = "15",
pages = "2970",
volume = "14",
doi = "https://doi.org/10.3390/polym14152970"
}

Pantić, O., Spasojević, M., Džunuzović, E., Nikolić, M. S., Savić, S., Marković, M.,& Spasojević, P.. (2022). The Effect of Glycol Derivatives on the Properties of Bio-Based Unsaturated Polyesters. in Polymers
MDPI., 14(15), 2970.
https://doi.org/https://doi.org/10.3390/polym14152970

Pantić O, Spasojević M, Džunuzović E, Nikolić MS, Savić S, Marković M, Spasojević P. The Effect of Glycol Derivatives on the Properties of Bio-Based Unsaturated Polyesters. in Polymers. 2022;14(15):2970.
doi:https://doi.org/10.3390/polym14152970 .

Pantić, Olga, Spasojević, Milica, Džunuzović, Enis, Nikolić, Marija S., Savić, Sanja, Marković, Maja, Spasojević, Pavle, "The Effect of Glycol Derivatives on the Properties of Bio-Based Unsaturated Polyesters" in Polymers, 14, no. 15 (2022):2970,
https://doi.org/https://doi.org/10.3390/polym14152970 . .

TY  - JOUR
AU  - Pantić, Nevena
AU  - Spasojević, Milica
AU  - Stojanović, Željko
AU  - Veljović, Đorđe
AU  - Krstić, Jugoslav
AU  - Balaž, Ana Marija
AU  - Prodanović, Radivoje
AU  - Prodanović, Olivera
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5096
AB  - Novel macroporous copolymers of glycidyl methacrylate and ethylene glycol dimethacrylate with mean pore size diameters ranging from 150 to 310 nm were synthesized by dispersion polymerization and modified with ethylenediamine. The glutaraldehyde and periodate method were employed to immobilize horseradish peroxidase (HRP) onto these carriers. The activity of the immobilized enzyme was greatly affected by the pore size of the carrier. The highest specific activities of 9.65 and 8.94 U/g of dry weight were obtained for HRP immobilized by the periodate-route onto poly(GMA‐co‐EGDMA) carriers with pore size diameters of 234 and 297 nm, respectively. Stability studies showed an improved operational stability of immobilized peroxidase at 65 °C and in an organic solvent. HRP immobilized on a copolymer with a pore size of 234 nm, showing the highest specific activity and good stability, had higher activities at almost all pH values than the native enzyme and the increased Km value for pyrogallol oxidation. Immobilized HRP retained 80% of its original activity after five consecutive cycles of the pyrogallol oxidation and 98% of its initial activity in a storage stability study. Enzyme immobilized onto the macroporous copolymer with the pore size diameter of 234 nm showed a substantial degree of phenol removal achieved by immobilized peroxidase.
PB  - Springer
T2  - Journal of Polymers and the Environment
T1  - Immobilization of Horseradish Peroxidase on Macroporous Glycidyl-Based Copolymers with Different Surface Characteristics for the Removal of Phenol
DO  - 10.1007/s10924-021-02364-3
ER  - 

@article{
author = "Pantić, Nevena and Spasojević, Milica and Stojanović, Željko and Veljović, Đorđe and Krstić, Jugoslav and Balaž, Ana Marija and Prodanović, Radivoje and Prodanović, Olivera",
year = "2022",
abstract = "Novel macroporous copolymers of glycidyl methacrylate and ethylene glycol dimethacrylate with mean pore size diameters ranging from 150 to 310 nm were synthesized by dispersion polymerization and modified with ethylenediamine. The glutaraldehyde and periodate method were employed to immobilize horseradish peroxidase (HRP) onto these carriers. The activity of the immobilized enzyme was greatly affected by the pore size of the carrier. The highest specific activities of 9.65 and 8.94 U/g of dry weight were obtained for HRP immobilized by the periodate-route onto poly(GMA‐co‐EGDMA) carriers with pore size diameters of 234 and 297 nm, respectively. Stability studies showed an improved operational stability of immobilized peroxidase at 65 °C and in an organic solvent. HRP immobilized on a copolymer with a pore size of 234 nm, showing the highest specific activity and good stability, had higher activities at almost all pH values than the native enzyme and the increased Km value for pyrogallol oxidation. Immobilized HRP retained 80% of its original activity after five consecutive cycles of the pyrogallol oxidation and 98% of its initial activity in a storage stability study. Enzyme immobilized onto the macroporous copolymer with the pore size diameter of 234 nm showed a substantial degree of phenol removal achieved by immobilized peroxidase.",
publisher = "Springer",
journal = "Journal of Polymers and the Environment",
title = "Immobilization of Horseradish Peroxidase on Macroporous Glycidyl-Based Copolymers with Different Surface Characteristics for the Removal of Phenol",
doi = "10.1007/s10924-021-02364-3"
}

Pantić, N., Spasojević, M., Stojanović, Ž., Veljović, Đ., Krstić, J., Balaž, A. M., Prodanović, R.,& Prodanović, O.. (2022). Immobilization of Horseradish Peroxidase on Macroporous Glycidyl-Based Copolymers with Different Surface Characteristics for the Removal of Phenol. in Journal of Polymers and the Environment
Springer..
https://doi.org/10.1007/s10924-021-02364-3

Pantić N, Spasojević M, Stojanović Ž, Veljović Đ, Krstić J, Balaž AM, Prodanović R, Prodanović O. Immobilization of Horseradish Peroxidase on Macroporous Glycidyl-Based Copolymers with Different Surface Characteristics for the Removal of Phenol. in Journal of Polymers and the Environment. 2022;.
doi:10.1007/s10924-021-02364-3 .

Pantić, Nevena, Spasojević, Milica, Stojanović, Željko, Veljović, Đorđe, Krstić, Jugoslav, Balaž, Ana Marija, Prodanović, Radivoje, Prodanović, Olivera, "Immobilization of Horseradish Peroxidase on Macroporous Glycidyl-Based Copolymers with Different Surface Characteristics for the Removal of Phenol" in Journal of Polymers and the Environment (2022),
https://doi.org/10.1007/s10924-021-02364-3 . .

TY  - JOUR
AU  - Djokic, Jovana
AU  - Radovanović, Dragana
AU  - Nikolovski, Zlatko
AU  - Andjic, Zoran
AU  - Kamberović, Željko
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4795
AB  - In order to reflect possible issues in future sole e-waste processing, an electrolyte of complex chemical composition reflecting system of sole e-waste processing was obtained by following a specially designed pyro-electrometallurgical method. The obtained non-standard electrolyte was further used for the purpose of comprehensive metal interference evaluation on the copper solvent extraction (SX) process. Optimization of the process included a variation of several process parameters, allowing determination of the effect of the most abundant and potentially the most influential impurities (Ni, Sn, Fe, and Zn) and 14 other trace elements. Moreover, comparing three commercial extractants of different active chelating groups, it was determined that branched aldoxime reagent is favorable for Cu extraction from the chemically complex system, as can be expected in future e-waste recycling. The results of this study showed that, under optimal conditions of 20 vol.% extractant concentration, feed pH 1.5, O/A ratio 3, and 10-min phase contact time, 88.1% of one stage Cu extraction was achieved. Co-extraction of the Fe, Zn, Ni, and Sn was under 8%, while Pb and trace elements were negligible. Optimal conditions (H2SO4 180 g/L, O/A = 2, and contact time 5 min) enabled 95.3% Cu stripping and under 6% of the most influential impurities. In addition, an impurity monitoring and distribution methodology enabled a better understanding and design of the process for the more efficient valorization of metals from e-waste.
T2  - Metals
T1  - Influence of Electrolyte Impurities from E-Waste Electrorefining on Copper Extraction Recovery
IS  - 9
VL  - 11
DO  - 10.3390/met11091383
ER  - 

@article{
author = "Djokic, Jovana and Radovanović, Dragana and Nikolovski, Zlatko and Andjic, Zoran and Kamberović, Željko",
year = "2021",
abstract = "In order to reflect possible issues in future sole e-waste processing, an electrolyte of complex chemical composition reflecting system of sole e-waste processing was obtained by following a specially designed pyro-electrometallurgical method. The obtained non-standard electrolyte was further used for the purpose of comprehensive metal interference evaluation on the copper solvent extraction (SX) process. Optimization of the process included a variation of several process parameters, allowing determination of the effect of the most abundant and potentially the most influential impurities (Ni, Sn, Fe, and Zn) and 14 other trace elements. Moreover, comparing three commercial extractants of different active chelating groups, it was determined that branched aldoxime reagent is favorable for Cu extraction from the chemically complex system, as can be expected in future e-waste recycling. The results of this study showed that, under optimal conditions of 20 vol.% extractant concentration, feed pH 1.5, O/A ratio 3, and 10-min phase contact time, 88.1% of one stage Cu extraction was achieved. Co-extraction of the Fe, Zn, Ni, and Sn was under 8%, while Pb and trace elements were negligible. Optimal conditions (H2SO4 180 g/L, O/A = 2, and contact time 5 min) enabled 95.3% Cu stripping and under 6% of the most influential impurities. In addition, an impurity monitoring and distribution methodology enabled a better understanding and design of the process for the more efficient valorization of metals from e-waste.",
journal = "Metals",
title = "Influence of Electrolyte Impurities from E-Waste Electrorefining on Copper Extraction Recovery",
number = "9",
volume = "11",
doi = "10.3390/met11091383"
}

Djokic, J., Radovanović, D., Nikolovski, Z., Andjic, Z.,& Kamberović, Ž.. (2021). Influence of Electrolyte Impurities from E-Waste Electrorefining on Copper Extraction Recovery. in Metals, 11(9).
https://doi.org/10.3390/met11091383

Djokic J, Radovanović D, Nikolovski Z, Andjic Z, Kamberović Ž. Influence of Electrolyte Impurities from E-Waste Electrorefining on Copper Extraction Recovery. in Metals. 2021;11(9).
doi:10.3390/met11091383 .

Djokic, Jovana, Radovanović, Dragana, Nikolovski, Zlatko, Andjic, Zoran, Kamberović, Željko, "Influence of Electrolyte Impurities from E-Waste Electrorefining on Copper Extraction Recovery" in Metals, 11, no. 9 (2021),
https://doi.org/10.3390/met11091383 . .

TY  - JOUR
AU  - Perendija, Jovana
AU  - Veličković, Zlate S.
AU  - Cvijetić, Ilija
AU  - Levic, Steva
AU  - Marinković, Aleksandar
AU  - Milosevic, Milena
AU  - Onjia, Antonije
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4901
AB  - Two optimized methods, based on epoxy-amino reactivity of the Cellulose fibres (Cell) modified with diethylenetriamine (Cell-DETA), (3-Glycidyloxypropyl)trimethoxysilane (Cell-Glymo), Lignin modified with epichlorohydrine (EL) and Tannic acid (TA), as an additional crosslinker, were developed for the production of the bio-renewable Cell-EL and Cell-EL-TA membranes. The influences of pH, contact time, adsorbent dose, and temperature on adsorption performances were studied by batch adsorption tests. The calculated capacities: 53.9, 99.9, 97.8 and 63.5, 115.8, 127.5 mg g(-1) for Ni2+, Pb2+, Cr(VI) using Cell-EL and Cell-EL-TA, respectively, were obtained from Langmuir model fitting at 25 degrees C. The thermodynamic parameters indicated spontaneous and low endothermic processes. The results of the kinetic study, i.e. pseudo-second-order (PSO) and Weber-Morris (W-M), suggest an intra-particle diffusion as a rate-limiting step. The semi-empirical quantum chemical calculations aided the analysis of the non-specificand specific adsorbent/adsorbate interactions and their contribution to the overall bonding mechanism. Membrane utility was confirmed by performing a bed column study. In general, three main environmental issues of the present study, biodegradability of the used membrane, desorption efficiency, and development of the technology for the effective effluent water treatment and safe disposal of by-products highly conform to the demand of integrated environmental management system applicability in practice.
T2  - Process Safety and Environmental Protection
T1  - Bio-membrane based on modified cellulose, lignin, and tannic acid for cation and oxyanion removal: Experimental and theoretical study
EP  - 625
SP  - 609
VL  - 147
DO  - 10.1016/j.psep.2020.12.027
ER  - 

@article{
author = "Perendija, Jovana and Veličković, Zlate S. and Cvijetić, Ilija and Levic, Steva and Marinković, Aleksandar and Milosevic, Milena and Onjia, Antonije",
year = "2021",
abstract = "Two optimized methods, based on epoxy-amino reactivity of the Cellulose fibres (Cell) modified with diethylenetriamine (Cell-DETA), (3-Glycidyloxypropyl)trimethoxysilane (Cell-Glymo), Lignin modified with epichlorohydrine (EL) and Tannic acid (TA), as an additional crosslinker, were developed for the production of the bio-renewable Cell-EL and Cell-EL-TA membranes. The influences of pH, contact time, adsorbent dose, and temperature on adsorption performances were studied by batch adsorption tests. The calculated capacities: 53.9, 99.9, 97.8 and 63.5, 115.8, 127.5 mg g(-1) for Ni2+, Pb2+, Cr(VI) using Cell-EL and Cell-EL-TA, respectively, were obtained from Langmuir model fitting at 25 degrees C. The thermodynamic parameters indicated spontaneous and low endothermic processes. The results of the kinetic study, i.e. pseudo-second-order (PSO) and Weber-Morris (W-M), suggest an intra-particle diffusion as a rate-limiting step. The semi-empirical quantum chemical calculations aided the analysis of the non-specificand specific adsorbent/adsorbate interactions and their contribution to the overall bonding mechanism. Membrane utility was confirmed by performing a bed column study. In general, three main environmental issues of the present study, biodegradability of the used membrane, desorption efficiency, and development of the technology for the effective effluent water treatment and safe disposal of by-products highly conform to the demand of integrated environmental management system applicability in practice.",
journal = "Process Safety and Environmental Protection",
title = "Bio-membrane based on modified cellulose, lignin, and tannic acid for cation and oxyanion removal: Experimental and theoretical study",
pages = "625-609",
volume = "147",
doi = "10.1016/j.psep.2020.12.027"
}

Perendija, J., Veličković, Z. S., Cvijetić, I., Levic, S., Marinković, A., Milosevic, M.,& Onjia, A.. (2021). Bio-membrane based on modified cellulose, lignin, and tannic acid for cation and oxyanion removal: Experimental and theoretical study. in Process Safety and Environmental Protection, 147, 609-625.
https://doi.org/10.1016/j.psep.2020.12.027

Perendija J, Veličković ZS, Cvijetić I, Levic S, Marinković A, Milosevic M, Onjia A. Bio-membrane based on modified cellulose, lignin, and tannic acid for cation and oxyanion removal: Experimental and theoretical study. in Process Safety and Environmental Protection. 2021;147:609-625.
doi:10.1016/j.psep.2020.12.027 .

Perendija, Jovana, Veličković, Zlate S., Cvijetić, Ilija, Levic, Steva, Marinković, Aleksandar, Milosevic, Milena, Onjia, Antonije, "Bio-membrane based on modified cellulose, lignin, and tannic acid for cation and oxyanion removal: Experimental and theoretical study" in Process Safety and Environmental Protection, 147 (2021):609-625,
https://doi.org/10.1016/j.psep.2020.12.027 . .

TY  - JOUR
AU  - Milošević, Milena D.
AU  - Marinković, Aleksandar
AU  - Petrović, Predrag
AU  - Klaus, Anita
AU  - Nikolić, Milica G.
AU  - Prlainović, Nevena
AU  - Cvijetić, Ilija
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4393
AB  - In this study we synthesized a series of sixteen bis(imino)pyridines (BIPs) starting from 2,6-diaminopyridine and various aromatic aldehydes, and evaluated their antioxidant, antibacterial, antifungal and acetylcholinesterase (AChE) inhibitory activity. The chemical structures were elucidated by FTIR, elemental analysis, ESR and HRMS. H-1 and C-13 NMR spectra couldn't be acquired due to the formation of stable, carbon-centered radical cations in a solution, as confirmed by ESR spectroscopy and DFT calculations. The in vitro antioxidant potency was evaluated using four assays: free radical scavenging activity (DPPH and ABTS), reducing power and total antioxidant capacity assay. BIPs demonstrated excellent antioxidant properties, and two derivatives proved to be more potent than reference antioxidants (ascorbic acid and Trolox) in all assays. DFT calculations on.B97XD/6-311++g(d,p) level of theory provided valuable insights into the radical scavenging mechanism of BIPs. For hydroxyl-substituted BIPs, hydrogen atom transfer (HAT) is a predominant mechanism, while the single electron transfer coupled with proton transfer (SET-PT) governs the antioxidant activity of other derivatives. Intramolecular hydrogen bonding (IHB) plays an important role in the mechanism of antioxidant activity as revealed by noncovalent interaction analysis and rotational barrier calculations. The spin density of radical cations is localized on carbon atoms of a pyridine ring, which corroborates with g-factors and multiplicity obtained from ESR analysis. The most potent BIP exhibited moderate inhibitory activity toward AChE (IC50 = 20 +/- 4 mu M), while molecular docking suggested binding at the peripheral anionic site of AChE with the MMFF94 binding enthalpy of -43.4 kcal/mol. Moderate in vitro antimicrobial activity of BIPs have been determined against several pathogenic bacterial strains: Pseudomonas aeruginosa, Escherichia coli, Enterococcus faecalis, Staphylococcus aureus and clinical isolate of methicillin resistant S. aureus (MRSA). The antifungal activity of BIPs toward Candida albicans was also confirmed. The similarity ensemble approach combined with molecular docking suggested leucyl aminopeptidase as the probable antimicrobial target for the three most potent BIP derivatives.
PB  - Academic Press Inc Elsevier Science, San Diego
T2  - Bioorganic Chemistry
T1  - Synthesis, characterization and SAR studies of bis(imino)pyridines as antioxidants, acetylcholinesterase inhibitors and antimicrobial agents
VL  - 102
DO  - 10.1016/j.bioorg.2020.104073
ER  - 

@article{
author = "Milošević, Milena D. and Marinković, Aleksandar and Petrović, Predrag and Klaus, Anita and Nikolić, Milica G. and Prlainović, Nevena and Cvijetić, Ilija",
year = "2020",
abstract = "In this study we synthesized a series of sixteen bis(imino)pyridines (BIPs) starting from 2,6-diaminopyridine and various aromatic aldehydes, and evaluated their antioxidant, antibacterial, antifungal and acetylcholinesterase (AChE) inhibitory activity. The chemical structures were elucidated by FTIR, elemental analysis, ESR and HRMS. H-1 and C-13 NMR spectra couldn't be acquired due to the formation of stable, carbon-centered radical cations in a solution, as confirmed by ESR spectroscopy and DFT calculations. The in vitro antioxidant potency was evaluated using four assays: free radical scavenging activity (DPPH and ABTS), reducing power and total antioxidant capacity assay. BIPs demonstrated excellent antioxidant properties, and two derivatives proved to be more potent than reference antioxidants (ascorbic acid and Trolox) in all assays. DFT calculations on.B97XD/6-311++g(d,p) level of theory provided valuable insights into the radical scavenging mechanism of BIPs. For hydroxyl-substituted BIPs, hydrogen atom transfer (HAT) is a predominant mechanism, while the single electron transfer coupled with proton transfer (SET-PT) governs the antioxidant activity of other derivatives. Intramolecular hydrogen bonding (IHB) plays an important role in the mechanism of antioxidant activity as revealed by noncovalent interaction analysis and rotational barrier calculations. The spin density of radical cations is localized on carbon atoms of a pyridine ring, which corroborates with g-factors and multiplicity obtained from ESR analysis. The most potent BIP exhibited moderate inhibitory activity toward AChE (IC50 = 20 +/- 4 mu M), while molecular docking suggested binding at the peripheral anionic site of AChE with the MMFF94 binding enthalpy of -43.4 kcal/mol. Moderate in vitro antimicrobial activity of BIPs have been determined against several pathogenic bacterial strains: Pseudomonas aeruginosa, Escherichia coli, Enterococcus faecalis, Staphylococcus aureus and clinical isolate of methicillin resistant S. aureus (MRSA). The antifungal activity of BIPs toward Candida albicans was also confirmed. The similarity ensemble approach combined with molecular docking suggested leucyl aminopeptidase as the probable antimicrobial target for the three most potent BIP derivatives.",
publisher = "Academic Press Inc Elsevier Science, San Diego",
journal = "Bioorganic Chemistry",
title = "Synthesis, characterization and SAR studies of bis(imino)pyridines as antioxidants, acetylcholinesterase inhibitors and antimicrobial agents",
volume = "102",
doi = "10.1016/j.bioorg.2020.104073"
}

Milošević, M. D., Marinković, A., Petrović, P., Klaus, A., Nikolić, M. G., Prlainović, N.,& Cvijetić, I.. (2020). Synthesis, characterization and SAR studies of bis(imino)pyridines as antioxidants, acetylcholinesterase inhibitors and antimicrobial agents. in Bioorganic Chemistry
Academic Press Inc Elsevier Science, San Diego., 102.
https://doi.org/10.1016/j.bioorg.2020.104073

Milošević MD, Marinković A, Petrović P, Klaus A, Nikolić MG, Prlainović N, Cvijetić I. Synthesis, characterization and SAR studies of bis(imino)pyridines as antioxidants, acetylcholinesterase inhibitors and antimicrobial agents. in Bioorganic Chemistry. 2020;102.
doi:10.1016/j.bioorg.2020.104073 .

Milošević, Milena D., Marinković, Aleksandar, Petrović, Predrag, Klaus, Anita, Nikolić, Milica G., Prlainović, Nevena, Cvijetić, Ilija, "Synthesis, characterization and SAR studies of bis(imino)pyridines as antioxidants, acetylcholinesterase inhibitors and antimicrobial agents" in Bioorganic Chemistry, 102 (2020),
https://doi.org/10.1016/j.bioorg.2020.104073 . .

TY  - JOUR
AU  - Perendija, Jovana
AU  - Veličković, Zlate
AU  - Cvijetić, Ilija
AU  - Rusmirović, Jelena
AU  - Ugrinović, Vukašin
AU  - Marinković, Aleksandar
AU  - Onjia, Antonije
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4348
AB  - An optimized method is presented to make magnetite (MG) modified cellulose membrane (Cell-MG) from 3-aminopropyltriethoxysilane and diethylenetriaminepentaacetic acid dianhydride functionalized waste cell fibers; (Cell-NH(2)and Cell-DTPA), and amino-modified diatomite. Functionalized Cell-NH2, Cell-DTPA fibers, and diatomite were structurally and morphologically characterized using FT-IR, Raman, and FE-SEM analysis. Amino and carboxyl group content was determined via standard volumetric methods. Response surface method was applied to rationalize the number of experiments related to Cell-MG synthesis and heavy metal ions column adsorption experiments. The effects of pH, contact time, temperature, and initial concentration of pollutants on adsorption and kinetics were studied in a batch, while initial concentration and flow rate were studied in a flow system. The calculated capacities of 88.2, 100.7, 95.8 and 78.2 mg g(-1)for Ni2+, Pb2+, Cr(VI) and As(V) ions, respectively, were obtained from Langmuir model fitting. Intra-particle diffusion as a rate-limiting step was evaluated from pseudo-second-order and Weber-Morris model fitting. Thermodynamic parameters indicated spontaneous and low endothermic processes. The results from reusability study, wastewater purification and fixed-bed column study proved the high applicability of Cell-MG. Additionally, high removal capacity of four dyes together with density functional theory and molecular interaction fields, help in the establishment of relation between the adsorption performances and contribution of non-specific and specific interactions at adsorbate/adsorbent interface.
PB  - Springer, Dordrecht
T2  - Cellulose
T1  - Batch and column adsorption of cations, oxyanions and dyes on a magnetite modified cellulose-based membrane
EP  - 8235
IS  - 14
SP  - 8215
VL  - 27
DO  - 10.1007/s10570-020-03352-x
ER  - 

@article{
author = "Perendija, Jovana and Veličković, Zlate and Cvijetić, Ilija and Rusmirović, Jelena and Ugrinović, Vukašin and Marinković, Aleksandar and Onjia, Antonije",
year = "2020",
abstract = "An optimized method is presented to make magnetite (MG) modified cellulose membrane (Cell-MG) from 3-aminopropyltriethoxysilane and diethylenetriaminepentaacetic acid dianhydride functionalized waste cell fibers; (Cell-NH(2)and Cell-DTPA), and amino-modified diatomite. Functionalized Cell-NH2, Cell-DTPA fibers, and diatomite were structurally and morphologically characterized using FT-IR, Raman, and FE-SEM analysis. Amino and carboxyl group content was determined via standard volumetric methods. Response surface method was applied to rationalize the number of experiments related to Cell-MG synthesis and heavy metal ions column adsorption experiments. The effects of pH, contact time, temperature, and initial concentration of pollutants on adsorption and kinetics were studied in a batch, while initial concentration and flow rate were studied in a flow system. The calculated capacities of 88.2, 100.7, 95.8 and 78.2 mg g(-1)for Ni2+, Pb2+, Cr(VI) and As(V) ions, respectively, were obtained from Langmuir model fitting. Intra-particle diffusion as a rate-limiting step was evaluated from pseudo-second-order and Weber-Morris model fitting. Thermodynamic parameters indicated spontaneous and low endothermic processes. The results from reusability study, wastewater purification and fixed-bed column study proved the high applicability of Cell-MG. Additionally, high removal capacity of four dyes together with density functional theory and molecular interaction fields, help in the establishment of relation between the adsorption performances and contribution of non-specific and specific interactions at adsorbate/adsorbent interface.",
publisher = "Springer, Dordrecht",
journal = "Cellulose",
title = "Batch and column adsorption of cations, oxyanions and dyes on a magnetite modified cellulose-based membrane",
pages = "8235-8215",
number = "14",
volume = "27",
doi = "10.1007/s10570-020-03352-x"
}

Perendija, J., Veličković, Z., Cvijetić, I., Rusmirović, J., Ugrinović, V., Marinković, A.,& Onjia, A.. (2020). Batch and column adsorption of cations, oxyanions and dyes on a magnetite modified cellulose-based membrane. in Cellulose
Springer, Dordrecht., 27(14), 8215-8235.
https://doi.org/10.1007/s10570-020-03352-x

Perendija J, Veličković Z, Cvijetić I, Rusmirović J, Ugrinović V, Marinković A, Onjia A. Batch and column adsorption of cations, oxyanions and dyes on a magnetite modified cellulose-based membrane. in Cellulose. 2020;27(14):8215-8235.
doi:10.1007/s10570-020-03352-x .

Perendija, Jovana, Veličković, Zlate, Cvijetić, Ilija, Rusmirović, Jelena, Ugrinović, Vukašin, Marinković, Aleksandar, Onjia, Antonije, "Batch and column adsorption of cations, oxyanions and dyes on a magnetite modified cellulose-based membrane" in Cellulose, 27, no. 14 (2020):8215-8235,
https://doi.org/10.1007/s10570-020-03352-x . .