TY  - JOUR
AU  - Nikolić, Vesna
AU  - Tomić, Nataša
AU  - Bugarcic, Mladen
AU  - Sokić, Miroslav
AU  - Marinković, Aleksandar
AU  - Veličković, Zlate
AU  - Kamberović, Željko
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4966
AB  - A simple sol-gel method and external gelatinization method of hollow alumina spheres synthesis were developed in this study. The spheres were modified with polyethyleneimine (PEI) producing PEI-Al2O3 via (3-glycidyloxypropyl)trimethoxy-silane, GLYMO, linker. Characterization results, obtained using XRD and SEM microscopy revealed spherical geometry with a hollow core of PEI-Al2O3 adsorbent. Introduction of a large number of the amino group, 6.9 mmol g(-1), contributes to achieving high adsorption capacities, q(m), of 95.6, 124.9, 61.3, and 125.9 mg g(-1) for Cd2+, Pb2+, As(V), and DCF, respectively, which is obtained by using the Langmuir model. Thermodynamic studies indicated feasible adsorption and higher spontaneity with temperature increase. The kinetic study conveniently modeled using pseudo-second-order (PSO) and Weber-Morris kinetic model, as well as single resistance mass transfer model, indicated a change of the contribution of diffusional processes during adsorption with a dominance of intra-particle diffusion. The fixed-bed column adsorption data, fitted using Bohart-Adams, Clark, Yoon-Nelson, and Thomas models, showed lower capacity in comparison to batch study, and thus clear potential applicability of PEI-Al2O3 was deduced even at a high loading of feed water.
T2  - Environmental Science and Pollution Research
T1  - Amino-modified hollow alumina spheres: effective adsorbent for Cd2+, Pb2+, As(V), and diclofenac removal
EP  - 27192
IS  - 21
SP  - 27174
VL  - 28
DO  - 10.1007/s11356-020-12157-1
ER  - 

@article{
author = "Nikolić, Vesna and Tomić, Nataša and Bugarcic, Mladen and Sokić, Miroslav and Marinković, Aleksandar and Veličković, Zlate and Kamberović, Željko",
year = "2021",
abstract = "A simple sol-gel method and external gelatinization method of hollow alumina spheres synthesis were developed in this study. The spheres were modified with polyethyleneimine (PEI) producing PEI-Al2O3 via (3-glycidyloxypropyl)trimethoxy-silane, GLYMO, linker. Characterization results, obtained using XRD and SEM microscopy revealed spherical geometry with a hollow core of PEI-Al2O3 adsorbent. Introduction of a large number of the amino group, 6.9 mmol g(-1), contributes to achieving high adsorption capacities, q(m), of 95.6, 124.9, 61.3, and 125.9 mg g(-1) for Cd2+, Pb2+, As(V), and DCF, respectively, which is obtained by using the Langmuir model. Thermodynamic studies indicated feasible adsorption and higher spontaneity with temperature increase. The kinetic study conveniently modeled using pseudo-second-order (PSO) and Weber-Morris kinetic model, as well as single resistance mass transfer model, indicated a change of the contribution of diffusional processes during adsorption with a dominance of intra-particle diffusion. The fixed-bed column adsorption data, fitted using Bohart-Adams, Clark, Yoon-Nelson, and Thomas models, showed lower capacity in comparison to batch study, and thus clear potential applicability of PEI-Al2O3 was deduced even at a high loading of feed water.",
journal = "Environmental Science and Pollution Research",
title = "Amino-modified hollow alumina spheres: effective adsorbent for Cd2+, Pb2+, As(V), and diclofenac removal",
pages = "27192-27174",
number = "21",
volume = "28",
doi = "10.1007/s11356-020-12157-1"
}

Nikolić, V., Tomić, N., Bugarcic, M., Sokić, M., Marinković, A., Veličković, Z.,& Kamberović, Ž.. (2021). Amino-modified hollow alumina spheres: effective adsorbent for Cd2+, Pb2+, As(V), and diclofenac removal. in Environmental Science and Pollution Research, 28(21), 27174-27192.
https://doi.org/10.1007/s11356-020-12157-1

Nikolić V, Tomić N, Bugarcic M, Sokić M, Marinković A, Veličković Z, Kamberović Ž. Amino-modified hollow alumina spheres: effective adsorbent for Cd2+, Pb2+, As(V), and diclofenac removal. in Environmental Science and Pollution Research. 2021;28(21):27174-27192.
doi:10.1007/s11356-020-12157-1 .

Nikolić, Vesna, Tomić, Nataša, Bugarcic, Mladen, Sokić, Miroslav, Marinković, Aleksandar, Veličković, Zlate, Kamberović, Željko, "Amino-modified hollow alumina spheres: effective adsorbent for Cd2+, Pb2+, As(V), and diclofenac removal" in Environmental Science and Pollution Research, 28, no. 21 (2021):27174-27192,
https://doi.org/10.1007/s11356-020-12157-1 . .

TY  - JOUR
AU  - Bugarcic, Mladen
AU  - Lopicic, Zorica
AU  - Sostaric, Tatjana
AU  - Marinković, Aleksandar
AU  - Rusmirovic, Jelena D.
AU  - Milosevic, Dragana
AU  - Milivojević, Milan
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4800
AB  - Expanded vermiculite (EV) was modified by deposition of different spinel ferrite composites on the outer surface of EV 2:1 layers in order to improve its adsorptive properties. Modifications were made by deposition of: magnetite, manganese ferrite, cobalt ferrite and chromium oxide/hematite. The characterization of modified materials was performed by: scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) methodology, X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), magnetization measurements, as well as determination of cation exchange capacity (CEC) and pH point of zero charge (pHPZC). Obtained samples were used as adsorbents for Pb2+, Ni(2+)and Cd2+ ions from an aqueous solution in a batch system. Results showed that adsorption capacity was strongly dependent on physical and chemical changes induced by specific chemical modification. Hydrothermally produced manganese and cobalt ferrites caused significant surface changes and altered the interlayer cation balance. Among the others, EV-Mn/Co-ferrite(s) samples possessed the highest adsorption capacity towards Ni2+ (33.06 mg g(-1)), along with an increase of the CEC. Freundlich's adsorption isotherm model provided the best fit of obtained experimental data, while kinetic studies showed that the adsorption rate follows the pseudo second-order model, implying heterogeneous adsorbents surface. Thermodynamic and kinetic parameters indicated that the mechanism of cations removal efficacy was dominantly followed by the ion exchange. This study confirmed that doped ferrites, produced by solvothermal method, improve surface properties of EV and increase adsorption potentials towards heavy metals.
T2  - Journal of Environmental Chemical Engineering
T1  - Vermiculite enriched by Fe(III) oxides as a novel adsorbent for toxic metals removal
IS  - 5
VL  - 9
DO  - 10.1016/j.jece.2021.106020
ER  - 

@article{
author = "Bugarcic, Mladen and Lopicic, Zorica and Sostaric, Tatjana and Marinković, Aleksandar and Rusmirovic, Jelena D. and Milosevic, Dragana and Milivojević, Milan",
year = "2021",
abstract = "Expanded vermiculite (EV) was modified by deposition of different spinel ferrite composites on the outer surface of EV 2:1 layers in order to improve its adsorptive properties. Modifications were made by deposition of: magnetite, manganese ferrite, cobalt ferrite and chromium oxide/hematite. The characterization of modified materials was performed by: scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) methodology, X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), magnetization measurements, as well as determination of cation exchange capacity (CEC) and pH point of zero charge (pHPZC). Obtained samples were used as adsorbents for Pb2+, Ni(2+)and Cd2+ ions from an aqueous solution in a batch system. Results showed that adsorption capacity was strongly dependent on physical and chemical changes induced by specific chemical modification. Hydrothermally produced manganese and cobalt ferrites caused significant surface changes and altered the interlayer cation balance. Among the others, EV-Mn/Co-ferrite(s) samples possessed the highest adsorption capacity towards Ni2+ (33.06 mg g(-1)), along with an increase of the CEC. Freundlich's adsorption isotherm model provided the best fit of obtained experimental data, while kinetic studies showed that the adsorption rate follows the pseudo second-order model, implying heterogeneous adsorbents surface. Thermodynamic and kinetic parameters indicated that the mechanism of cations removal efficacy was dominantly followed by the ion exchange. This study confirmed that doped ferrites, produced by solvothermal method, improve surface properties of EV and increase adsorption potentials towards heavy metals.",
journal = "Journal of Environmental Chemical Engineering",
title = "Vermiculite enriched by Fe(III) oxides as a novel adsorbent for toxic metals removal",
number = "5",
volume = "9",
doi = "10.1016/j.jece.2021.106020"
}

Bugarcic, M., Lopicic, Z., Sostaric, T., Marinković, A., Rusmirovic, J. D., Milosevic, D.,& Milivojević, M.. (2021). Vermiculite enriched by Fe(III) oxides as a novel adsorbent for toxic metals removal. in Journal of Environmental Chemical Engineering, 9(5).
https://doi.org/10.1016/j.jece.2021.106020

Bugarcic M, Lopicic Z, Sostaric T, Marinković A, Rusmirovic JD, Milosevic D, Milivojević M. Vermiculite enriched by Fe(III) oxides as a novel adsorbent for toxic metals removal. in Journal of Environmental Chemical Engineering. 2021;9(5).
doi:10.1016/j.jece.2021.106020 .

Bugarcic, Mladen, Lopicic, Zorica, Sostaric, Tatjana, Marinković, Aleksandar, Rusmirovic, Jelena D., Milosevic, Dragana, Milivojević, Milan, "Vermiculite enriched by Fe(III) oxides as a novel adsorbent for toxic metals removal" in Journal of Environmental Chemical Engineering, 9, no. 5 (2021),
https://doi.org/10.1016/j.jece.2021.106020 . .