TY  - JOUR
AU  - Marjanović, Vesna
AU  - Perić-Grujić, Aleksandra A.
AU  - Ristić, Mirjana
AU  - Marinković, Aleksandar D.
AU  - Marković, Radmila
AU  - Onjia, Antonije E.
AU  - Šljivić-Ivanović, Marija Z.
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9760
AB  - Hybrid adsorbent, based on the cross-linked copolymer impregnated with hydrous iron oxide, was applied for the first time for Se(VI) adsorption from water. The influence of the initial solution pH, selenate concentration and contact time to adsorption capacity was investigated. Adsorbent regeneration was explored using a full factorial experimental design in order to optimize the volume, initial pH value and concentration of the applied NaCl solution as a reagent. Equilibrium state was described using the Langmuir model, while kinetics fitted the pseudo-first order. The maximum adsorption capacity was found to be 28.8 mg/g. Desorption efficiency increased up to 70%, and became statistically significant with the reagent concentration and pH increase, while the applied solution volume was found to be insignificant in the investigated range. Based on the results obtained, pH influence to the adsorption capacity, desorption efficiency, Fourier transform infrared (FTIR) and X-ray diffraction (XRD) analysis of loaded adsorbent, it was concluded that the outer-and inner-sphere complexation are mechanisms responsible for Se(VI) separation from water. In addition to the experiments with synthetic solutions, the adsorbent performances in drinking water samples were explored, showing the purification efficiency up to 25%, depending on the initial Se(VI) concentration and water pH. Determined sorption capacity of the cross-linked copolymer impregnated with hydrous iron oxide and its ability for regeneration, candidate this material for further research, as a promising anionic species sorbent.
T2  - Metals
T1  - Selenate adsorption from water using the hydrous iron oxide-impregnated hybrid polymer
VL  - 10
IS  - 12
SP  - 1
EP  - 15
DO  - 10.3390/met10121630
ER  - 

@article{
author = "Marjanović, Vesna and Perić-Grujić, Aleksandra A. and Ristić, Mirjana and Marinković, Aleksandar D. and Marković, Radmila and Onjia, Antonije E. and Šljivić-Ivanović, Marija Z.",
year = "2020",
abstract = "Hybrid adsorbent, based on the cross-linked copolymer impregnated with hydrous iron oxide, was applied for the first time for Se(VI) adsorption from water. The influence of the initial solution pH, selenate concentration and contact time to adsorption capacity was investigated. Adsorbent regeneration was explored using a full factorial experimental design in order to optimize the volume, initial pH value and concentration of the applied NaCl solution as a reagent. Equilibrium state was described using the Langmuir model, while kinetics fitted the pseudo-first order. The maximum adsorption capacity was found to be 28.8 mg/g. Desorption efficiency increased up to 70%, and became statistically significant with the reagent concentration and pH increase, while the applied solution volume was found to be insignificant in the investigated range. Based on the results obtained, pH influence to the adsorption capacity, desorption efficiency, Fourier transform infrared (FTIR) and X-ray diffraction (XRD) analysis of loaded adsorbent, it was concluded that the outer-and inner-sphere complexation are mechanisms responsible for Se(VI) separation from water. In addition to the experiments with synthetic solutions, the adsorbent performances in drinking water samples were explored, showing the purification efficiency up to 25%, depending on the initial Se(VI) concentration and water pH. Determined sorption capacity of the cross-linked copolymer impregnated with hydrous iron oxide and its ability for regeneration, candidate this material for further research, as a promising anionic species sorbent.",
journal = "Metals",
title = "Selenate adsorption from water using the hydrous iron oxide-impregnated hybrid polymer",
volume = "10",
number = "12",
pages = "1-15",
doi = "10.3390/met10121630"
}

Marjanović, V., Perić-Grujić, A. A., Ristić, M., Marinković, A. D., Marković, R., Onjia, A. E.,& Šljivić-Ivanović, M. Z.. (2020). Selenate adsorption from water using the hydrous iron oxide-impregnated hybrid polymer. in Metals, 10(12), 1-15.
https://doi.org/10.3390/met10121630

Marjanović V, Perić-Grujić AA, Ristić M, Marinković AD, Marković R, Onjia AE, Šljivić-Ivanović MZ. Selenate adsorption from water using the hydrous iron oxide-impregnated hybrid polymer. in Metals. 2020;10(12):1-15.
doi:10.3390/met10121630 .

Marjanović, Vesna, Perić-Grujić, Aleksandra A., Ristić, Mirjana, Marinković, Aleksandar D., Marković, Radmila, Onjia, Antonije E., Šljivić-Ivanović, Marija Z., "Selenate adsorption from water using the hydrous iron oxide-impregnated hybrid polymer" in Metals, 10, no. 12 (2020):1-15,
https://doi.org/10.3390/met10121630 . .

TY  - JOUR
AU  - Mitić, Marko
AU  - Milovanović, Milan
AU  - Veljković, Filip M.
AU  - Perić-Grujić, Aleksandra A.
AU  - Veličković, Suzana
AU  - Jerosimić, Stanka
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8973
AB  - In the present paper, the results of combined theoretical and experimental investigation of small non-stoichiometric bromine-doped potassium clusters are reported. Potassium-bromide clusters were obtained by the Knudsen cell combined with surface ionization in the temperature range of 1000–1600 K, and selected by a magnetic sector mass spectrometer. Positive ions of KnBr (n = 3–6) and KnBrn-1 (n = 3–5) clusters were detected for the first time in one set measurement. In order to reveal the geometrical structure of each type of detected cluster, the randomized search algorithm was employed to survey the (Born-Oppenheimer) potential energy surface of both the neutral and cationic KnBr(0,1+) (n = 1–6) and KnBrn-1(0,1+) (n=3–5) clusters, followed by Density functional theory geometry optimizations, and many lowest-energy conformational isomers are presented. From the total electronic energies of clusters computed by the ab initio RCCSD(T)/ECP10MDF(K),cc-pVTZ-PP(Br) method at obtained equilibrium nuclear geometries, the following stability parameters of clusters were computed: their relative energies, the adiabatic and vertical ionization energies, binding energies per atom, and dissociation energies. Both experimental and theoretical results have shown that the title clusters belong to the group of “superalkali” clusters.
T2  - Journal of Alloys and Compounds
T1  - Theoretical and experimental study of small potassium-bromide KnBr(0,1+) (n = 2–6) and KnBrn-1(0,1+) (n = 3–5) clusters
VL  - 835
SP  - 155301
DO  - 10.1016/j.jallcom.2020.155301
ER  - 

@article{
author = "Mitić, Marko and Milovanović, Milan and Veljković, Filip M. and Perić-Grujić, Aleksandra A. and Veličković, Suzana and Jerosimić, Stanka",
year = "2020",
abstract = "In the present paper, the results of combined theoretical and experimental investigation of small non-stoichiometric bromine-doped potassium clusters are reported. Potassium-bromide clusters were obtained by the Knudsen cell combined with surface ionization in the temperature range of 1000–1600 K, and selected by a magnetic sector mass spectrometer. Positive ions of KnBr (n = 3–6) and KnBrn-1 (n = 3–5) clusters were detected for the first time in one set measurement. In order to reveal the geometrical structure of each type of detected cluster, the randomized search algorithm was employed to survey the (Born-Oppenheimer) potential energy surface of both the neutral and cationic KnBr(0,1+) (n = 1–6) and KnBrn-1(0,1+) (n=3–5) clusters, followed by Density functional theory geometry optimizations, and many lowest-energy conformational isomers are presented. From the total electronic energies of clusters computed by the ab initio RCCSD(T)/ECP10MDF(K),cc-pVTZ-PP(Br) method at obtained equilibrium nuclear geometries, the following stability parameters of clusters were computed: their relative energies, the adiabatic and vertical ionization energies, binding energies per atom, and dissociation energies. Both experimental and theoretical results have shown that the title clusters belong to the group of “superalkali” clusters.",
journal = "Journal of Alloys and Compounds",
title = "Theoretical and experimental study of small potassium-bromide KnBr(0,1+) (n = 2–6) and KnBrn-1(0,1+) (n = 3–5) clusters",
volume = "835",
pages = "155301",
doi = "10.1016/j.jallcom.2020.155301"
}

Mitić, M., Milovanović, M., Veljković, F. M., Perić-Grujić, A. A., Veličković, S.,& Jerosimić, S.. (2020). Theoretical and experimental study of small potassium-bromide KnBr(0,1+) (n = 2–6) and KnBrn-1(0,1+) (n = 3–5) clusters. in Journal of Alloys and Compounds, 835, 155301.
https://doi.org/10.1016/j.jallcom.2020.155301

Mitić M, Milovanović M, Veljković FM, Perić-Grujić AA, Veličković S, Jerosimić S. Theoretical and experimental study of small potassium-bromide KnBr(0,1+) (n = 2–6) and KnBrn-1(0,1+) (n = 3–5) clusters. in Journal of Alloys and Compounds. 2020;835:155301.
doi:10.1016/j.jallcom.2020.155301 .

Mitić, Marko, Milovanović, Milan, Veljković, Filip M., Perić-Grujić, Aleksandra A., Veličković, Suzana, Jerosimić, Stanka, "Theoretical and experimental study of small potassium-bromide KnBr(0,1+) (n = 2–6) and KnBrn-1(0,1+) (n = 3–5) clusters" in Journal of Alloys and Compounds, 835 (2020):155301,
https://doi.org/10.1016/j.jallcom.2020.155301 . .

TY  - JOUR
AU  - Milovanović, Branislav
AU  - Milovanović, Milan
AU  - Veličković, Suzana
AU  - Veljković, Filip M.
AU  - Perić-Grujić, Aleksandra A.
AU  - Jerosimić, Stanka
PY  - 2019
UR  - https://onlinelibrary.wiley.com/doi/abs/10.1002/qua.26009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8352
AB  - Small heterogeneous potassium-iodide clusters are investigated by means of ab initio electronic structural methods together with experimental production and detection in mass spectrometry. Experiments were done by using Knudsen cell mass spectrometry (KCMS) modification method, which provided simultaneous generating of all KnI0,+1 (n = 2–6) clusters at once. Clusters with more than two potassium atoms are produced for the first time. The lowest lying isomers of those KnI0,+1 (n = 2–6) clusters were found by using a random-kick procedure. The best description of growth of these clusters is the addition of one potassium atom to a smaller-neighbor cluster. Subsequently, stability of these species was examined. In spite of general trend of decreasing of binding energies, the closed-shell species have slightly larger stability with respect to the open-shell species. Alternation of dissociation energies between closed-shell and open-shell clusters is presented. Experimental setup also allows determination of ionization energies of clusters: the obtained values are in the range of 3.46–3.98 eV, which classify these clusters as “superalkali.” For closed-shell clusters, the theoretical adiabatic ionization energies are close to experimental values, whereas in the case of open-shell clusters, the vertical ionization energies are those that are close to experimental values. © 2019 Wiley Periodicals, Inc.
T2  - International Journal of Quantum Chemistry
T1  - Theoretical and experimental investigation of geometry and stability of small potassium‐iodide KnI(n=2–6) clusters
VL  - 119
IS  - 22
SP  - e26009
DO  - 10.1002/qua.26009
ER  - 

@article{
author = "Milovanović, Branislav and Milovanović, Milan and Veličković, Suzana and Veljković, Filip M. and Perić-Grujić, Aleksandra A. and Jerosimić, Stanka",
year = "2019",
abstract = "Small heterogeneous potassium-iodide clusters are investigated by means of ab initio electronic structural methods together with experimental production and detection in mass spectrometry. Experiments were done by using Knudsen cell mass spectrometry (KCMS) modification method, which provided simultaneous generating of all KnI0,+1 (n = 2–6) clusters at once. Clusters with more than two potassium atoms are produced for the first time. The lowest lying isomers of those KnI0,+1 (n = 2–6) clusters were found by using a random-kick procedure. The best description of growth of these clusters is the addition of one potassium atom to a smaller-neighbor cluster. Subsequently, stability of these species was examined. In spite of general trend of decreasing of binding energies, the closed-shell species have slightly larger stability with respect to the open-shell species. Alternation of dissociation energies between closed-shell and open-shell clusters is presented. Experimental setup also allows determination of ionization energies of clusters: the obtained values are in the range of 3.46–3.98 eV, which classify these clusters as “superalkali.” For closed-shell clusters, the theoretical adiabatic ionization energies are close to experimental values, whereas in the case of open-shell clusters, the vertical ionization energies are those that are close to experimental values. © 2019 Wiley Periodicals, Inc.",
journal = "International Journal of Quantum Chemistry",
title = "Theoretical and experimental investigation of geometry and stability of small potassium‐iodide KnI(n=2–6) clusters",
volume = "119",
number = "22",
pages = "e26009",
doi = "10.1002/qua.26009"
}

Milovanović, B., Milovanović, M., Veličković, S., Veljković, F. M., Perić-Grujić, A. A.,& Jerosimić, S.. (2019). Theoretical and experimental investigation of geometry and stability of small potassium‐iodide KnI(n=2–6) clusters. in International Journal of Quantum Chemistry, 119(22), e26009.
https://doi.org/10.1002/qua.26009

Milovanović B, Milovanović M, Veličković S, Veljković FM, Perić-Grujić AA, Jerosimić S. Theoretical and experimental investigation of geometry and stability of small potassium‐iodide KnI(n=2–6) clusters. in International Journal of Quantum Chemistry. 2019;119(22):e26009.
doi:10.1002/qua.26009 .

Milovanović, Branislav, Milovanović, Milan, Veličković, Suzana, Veljković, Filip M., Perić-Grujić, Aleksandra A., Jerosimić, Stanka, "Theoretical and experimental investigation of geometry and stability of small potassium‐iodide KnI(n=2–6) clusters" in International Journal of Quantum Chemistry, 119, no. 22 (2019):e26009,
https://doi.org/10.1002/qua.26009 . .

TY  - JOUR
AU  - Nešović, Katarina
AU  - Janković, Ana
AU  - Perić-Grujić, Aleksandra A.
AU  - Vukašinović-Sekulić, Maja
AU  - Radetić, Tamara
AU  - Živković, Ljiljana
AU  - Park, Soo Jin
AU  - Rhee, Kyong Yop
AU  - Mišković-Stanković, Vesna
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8170
AB  - Silver nanoparticles (AgNPs) were synthesized by in situ electrochemical reduction of Ag+ ions in poly(vinyl alcohol)/chitosan/graphene (PVA/CHI/Gr) hydrogel matrices with different concentrations of chitosan. The physicochemical properties of nanocomposite hydrogels were investigated by UV–vis spectroscopy (UV–vis), dynamic light scattering (DLS), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), field-emission scanning electron microscopy (FE-SEM) and Fourier-transform infrared spectroscopy (FT-IR), thermal characteristics were determined by differential scanning calorimetry (DSC) and mechanical properties were measured by tensile test. The swelling studies were carried out in phosphate buffer to simulate natural physiological environment and data were fitted by several kinetic models to determine the diffusion mechanism and diffusion coefficients of the swelling medium through the hydrogel matrices. It was shown that the presence of silver nanoparticles increased the uptake capability and equilibrium swelling degree of the composite hydrogels. The antibacterial activity was confirmed against Escherichia coli and Staphylococcus aureus, while the hydrogels without AgNPs exhibited antibacterial properties due to the presence of chitosan. With the addition of AgNPs, the samples showed stronger activity and fast reduction in the number of colonies, confirming the synergistic effect of chitosan and AgNPs on the antibacterial activity. © 2019
T2  - Journal of Industrial and Engineering Chemistry
T1  - Kinetic models of swelling and thermal stability of silver/poly(vinyl alcohol)/chitosan/graphene hydrogels
VL  - 77
SP  - 83
EP  - 96
DO  - 10.1016/j.jiec.2019.04.022
ER  - 

@article{
author = "Nešović, Katarina and Janković, Ana and Perić-Grujić, Aleksandra A. and Vukašinović-Sekulić, Maja and Radetić, Tamara and Živković, Ljiljana and Park, Soo Jin and Rhee, Kyong Yop and Mišković-Stanković, Vesna",
year = "2019",
abstract = "Silver nanoparticles (AgNPs) were synthesized by in situ electrochemical reduction of Ag+ ions in poly(vinyl alcohol)/chitosan/graphene (PVA/CHI/Gr) hydrogel matrices with different concentrations of chitosan. The physicochemical properties of nanocomposite hydrogels were investigated by UV–vis spectroscopy (UV–vis), dynamic light scattering (DLS), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), field-emission scanning electron microscopy (FE-SEM) and Fourier-transform infrared spectroscopy (FT-IR), thermal characteristics were determined by differential scanning calorimetry (DSC) and mechanical properties were measured by tensile test. The swelling studies were carried out in phosphate buffer to simulate natural physiological environment and data were fitted by several kinetic models to determine the diffusion mechanism and diffusion coefficients of the swelling medium through the hydrogel matrices. It was shown that the presence of silver nanoparticles increased the uptake capability and equilibrium swelling degree of the composite hydrogels. The antibacterial activity was confirmed against Escherichia coli and Staphylococcus aureus, while the hydrogels without AgNPs exhibited antibacterial properties due to the presence of chitosan. With the addition of AgNPs, the samples showed stronger activity and fast reduction in the number of colonies, confirming the synergistic effect of chitosan and AgNPs on the antibacterial activity. © 2019",
journal = "Journal of Industrial and Engineering Chemistry",
title = "Kinetic models of swelling and thermal stability of silver/poly(vinyl alcohol)/chitosan/graphene hydrogels",
volume = "77",
pages = "83-96",
doi = "10.1016/j.jiec.2019.04.022"
}

Nešović, K., Janković, A., Perić-Grujić, A. A., Vukašinović-Sekulić, M., Radetić, T., Živković, L., Park, S. J., Rhee, K. Y.,& Mišković-Stanković, V.. (2019). Kinetic models of swelling and thermal stability of silver/poly(vinyl alcohol)/chitosan/graphene hydrogels. in Journal of Industrial and Engineering Chemistry, 77, 83-96.
https://doi.org/10.1016/j.jiec.2019.04.022

Nešović K, Janković A, Perić-Grujić AA, Vukašinović-Sekulić M, Radetić T, Živković L, Park SJ, Rhee KY, Mišković-Stanković V. Kinetic models of swelling and thermal stability of silver/poly(vinyl alcohol)/chitosan/graphene hydrogels. in Journal of Industrial and Engineering Chemistry. 2019;77:83-96.
doi:10.1016/j.jiec.2019.04.022 .

Nešović, Katarina, Janković, Ana, Perić-Grujić, Aleksandra A., Vukašinović-Sekulić, Maja, Radetić, Tamara, Živković, Ljiljana, Park, Soo Jin, Rhee, Kyong Yop, Mišković-Stanković, Vesna, "Kinetic models of swelling and thermal stability of silver/poly(vinyl alcohol)/chitosan/graphene hydrogels" in Journal of Industrial and Engineering Chemistry, 77 (2019):83-96,
https://doi.org/10.1016/j.jiec.2019.04.022 . .

TY  - JOUR
AU  - Nešović, Katarina
AU  - Janković, Ana
AU  - Perić-Grujić, Aleksandra A.
AU  - Vukašinović-Sekulić, Maja
AU  - Radetić, Tamara
AU  - Živković, Ljiljana
AU  - Park, Soo Jin
AU  - Rhee, Kyong Yop
AU  - Mišković-Stanković, Vesna
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8189
AB  - Silver nanoparticles (AgNPs) were synthesized by in situ electrochemical reduction of Ag+ ions in poly(vinyl alcohol)/chitosan/graphene (PVA/CHI/Gr) hydrogel matrices with different concentrations of chitosan. The physicochemical properties of nanocomposite hydrogels were investigated by UV–vis spectroscopy (UV–vis), dynamic light scattering (DLS), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), field-emission scanning electron microscopy (FE-SEM) and Fourier-transform infrared spectroscopy (FT-IR), thermal characteristics were determined by differential scanning calorimetry (DSC) and mechanical properties were measured by tensile test. The swelling studies were carried out in phosphate buffer to simulate natural physiological environment and data were fitted by several kinetic models to determine the diffusion mechanism and diffusion coefficients of the swelling medium through the hydrogel matrices. It was shown that the presence of silver nanoparticles increased the uptake capability and equilibrium swelling degree of the composite hydrogels. The antibacterial activity was confirmed against Escherichia coli and Staphylococcus aureus, while the hydrogels without AgNPs exhibited antibacterial properties due to the presence of chitosan. With the addition of AgNPs, the samples showed stronger activity and fast reduction in the number of colonies, confirming the synergistic effect of chitosan and AgNPs on the antibacterial activity. © 2019
T2  - Journal of Industrial and Engineering Chemistry
T1  - Kinetic models of swelling and thermal stability of silver/poly(vinyl alcohol)/chitosan/graphene hydrogels
VL  - 77
SP  - 83
EP  - 96
DO  - 10.1016/j.jiec.2019.04.022
ER  - 

@article{
author = "Nešović, Katarina and Janković, Ana and Perić-Grujić, Aleksandra A. and Vukašinović-Sekulić, Maja and Radetić, Tamara and Živković, Ljiljana and Park, Soo Jin and Rhee, Kyong Yop and Mišković-Stanković, Vesna",
year = "2019",
abstract = "Silver nanoparticles (AgNPs) were synthesized by in situ electrochemical reduction of Ag+ ions in poly(vinyl alcohol)/chitosan/graphene (PVA/CHI/Gr) hydrogel matrices with different concentrations of chitosan. The physicochemical properties of nanocomposite hydrogels were investigated by UV–vis spectroscopy (UV–vis), dynamic light scattering (DLS), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), field-emission scanning electron microscopy (FE-SEM) and Fourier-transform infrared spectroscopy (FT-IR), thermal characteristics were determined by differential scanning calorimetry (DSC) and mechanical properties were measured by tensile test. The swelling studies were carried out in phosphate buffer to simulate natural physiological environment and data were fitted by several kinetic models to determine the diffusion mechanism and diffusion coefficients of the swelling medium through the hydrogel matrices. It was shown that the presence of silver nanoparticles increased the uptake capability and equilibrium swelling degree of the composite hydrogels. The antibacterial activity was confirmed against Escherichia coli and Staphylococcus aureus, while the hydrogels without AgNPs exhibited antibacterial properties due to the presence of chitosan. With the addition of AgNPs, the samples showed stronger activity and fast reduction in the number of colonies, confirming the synergistic effect of chitosan and AgNPs on the antibacterial activity. © 2019",
journal = "Journal of Industrial and Engineering Chemistry",
title = "Kinetic models of swelling and thermal stability of silver/poly(vinyl alcohol)/chitosan/graphene hydrogels",
volume = "77",
pages = "83-96",
doi = "10.1016/j.jiec.2019.04.022"
}

Nešović, K., Janković, A., Perić-Grujić, A. A., Vukašinović-Sekulić, M., Radetić, T., Živković, L., Park, S. J., Rhee, K. Y.,& Mišković-Stanković, V.. (2019). Kinetic models of swelling and thermal stability of silver/poly(vinyl alcohol)/chitosan/graphene hydrogels. in Journal of Industrial and Engineering Chemistry, 77, 83-96.
https://doi.org/10.1016/j.jiec.2019.04.022

Nešović K, Janković A, Perić-Grujić AA, Vukašinović-Sekulić M, Radetić T, Živković L, Park SJ, Rhee KY, Mišković-Stanković V. Kinetic models of swelling and thermal stability of silver/poly(vinyl alcohol)/chitosan/graphene hydrogels. in Journal of Industrial and Engineering Chemistry. 2019;77:83-96.
doi:10.1016/j.jiec.2019.04.022 .

Nešović, Katarina, Janković, Ana, Perić-Grujić, Aleksandra A., Vukašinović-Sekulić, Maja, Radetić, Tamara, Živković, Ljiljana, Park, Soo Jin, Rhee, Kyong Yop, Mišković-Stanković, Vesna, "Kinetic models of swelling and thermal stability of silver/poly(vinyl alcohol)/chitosan/graphene hydrogels" in Journal of Industrial and Engineering Chemistry, 77 (2019):83-96,
https://doi.org/10.1016/j.jiec.2019.04.022 . .

TY  - JOUR
AU  - Nešović, Katarina
AU  - Janković, Ana
AU  - Radetić, Tamara
AU  - Vukašinović-Sekulić, Maja
AU  - Kojić, Vesna V.
AU  - Živković, Ljiljana
AU  - Perić-Grujić, Aleksandra A.
AU  - Rhee, Kyong Yop
AU  - Mišković-Stanković, Vesna
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8531
AB  - In this work, we provide a facile path for the preparation of wound dressing materials with improved characteristics based on biocompatible chitosan and poly(vinyl alcohol) hydrogels with embedded silver nanoparticles (AgNPs) as a potent antimicrobial agent. The hydrogels were prepared via freezing-thawing method, whereas AgNPs were synthesized via an in situ electrochemical route. The excellent physicochemical properties of the obtained nanocomposite hydrogels were validated using different spectroscopic and microscopic techniques. The formation of sub-10 nm AgNPs was confirmed by UV–visible spectroscopy, dynamic light scattering and transmission electron microscopy. Swelling and silver release profiles were validated using several diffusion models. The hydrogels were proven to be non-cytotoxic using MTT test and possessed powerful antibacterial activity against Staphylococcus aureus and Escherichia coli, as determined by test in suspension, which affirmed their feasibility for wound dressing applications. © 2019 Elsevier Ltd
T2  - European Polymer Journal
T1  - Chitosan-based hydrogel wound dressings with electrochemically incorporated silver nanoparticles – In vitro study
VL  - 121
SP  - 109257
DO  - 10.1016/j.eurpolymj.2019.109257
ER  - 

@article{
author = "Nešović, Katarina and Janković, Ana and Radetić, Tamara and Vukašinović-Sekulić, Maja and Kojić, Vesna V. and Živković, Ljiljana and Perić-Grujić, Aleksandra A. and Rhee, Kyong Yop and Mišković-Stanković, Vesna",
year = "2019",
abstract = "In this work, we provide a facile path for the preparation of wound dressing materials with improved characteristics based on biocompatible chitosan and poly(vinyl alcohol) hydrogels with embedded silver nanoparticles (AgNPs) as a potent antimicrobial agent. The hydrogels were prepared via freezing-thawing method, whereas AgNPs were synthesized via an in situ electrochemical route. The excellent physicochemical properties of the obtained nanocomposite hydrogels were validated using different spectroscopic and microscopic techniques. The formation of sub-10 nm AgNPs was confirmed by UV–visible spectroscopy, dynamic light scattering and transmission electron microscopy. Swelling and silver release profiles were validated using several diffusion models. The hydrogels were proven to be non-cytotoxic using MTT test and possessed powerful antibacterial activity against Staphylococcus aureus and Escherichia coli, as determined by test in suspension, which affirmed their feasibility for wound dressing applications. © 2019 Elsevier Ltd",
journal = "European Polymer Journal",
title = "Chitosan-based hydrogel wound dressings with electrochemically incorporated silver nanoparticles – In vitro study",
volume = "121",
pages = "109257",
doi = "10.1016/j.eurpolymj.2019.109257"
}

Nešović, K., Janković, A., Radetić, T., Vukašinović-Sekulić, M., Kojić, V. V., Živković, L., Perić-Grujić, A. A., Rhee, K. Y.,& Mišković-Stanković, V.. (2019). Chitosan-based hydrogel wound dressings with electrochemically incorporated silver nanoparticles – In vitro study. in European Polymer Journal, 121, 109257.
https://doi.org/10.1016/j.eurpolymj.2019.109257

Nešović K, Janković A, Radetić T, Vukašinović-Sekulić M, Kojić VV, Živković L, Perić-Grujić AA, Rhee KY, Mišković-Stanković V. Chitosan-based hydrogel wound dressings with electrochemically incorporated silver nanoparticles – In vitro study. in European Polymer Journal. 2019;121:109257.
doi:10.1016/j.eurpolymj.2019.109257 .

Nešović, Katarina, Janković, Ana, Radetić, Tamara, Vukašinović-Sekulić, Maja, Kojić, Vesna V., Živković, Ljiljana, Perić-Grujić, Aleksandra A., Rhee, Kyong Yop, Mišković-Stanković, Vesna, "Chitosan-based hydrogel wound dressings with electrochemically incorporated silver nanoparticles – In vitro study" in European Polymer Journal, 121 (2019):109257,
https://doi.org/10.1016/j.eurpolymj.2019.109257 . .

TY  - JOUR
AU  - Veljković, Filip M.
AU  - Perić-Grujić, Aleksandra A.
AU  - Veličković, Suzana
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1393
AB  - Knudsen effusion mass spectrometry or high-temperature method of mass spectrometry for decades gives new information about saturated vapor of hardly volatile compounds and it is an important method in the discovery of many new molecules, radicals, ions and clusters present in the gas phase. Since pioneering works until now, this method has been successfully applied to a large number of systems (ores, oxides, ceramics, glass materials, borides, carbides, sulfides, nitrates, metals, fullerenes, etc.) which led to the establishment of various research branches such as chemistry of clusters. This paper describes the basic principles of Knudsen cell use for both identification of chemical species created in the process of evaporation and determination of their ionization energies. Depending on detected ions intensities and the partial pressure of each gaseous component, as well as on changes in partial pressure with temperature, Knudsen cell mass spectrometry enables the determination of thermodynamic parameters of the tested system. A special attention is paid to its application in the field of small heterogeneous and homogeneous clusters of alkali metals. Furthermore, experimental results for thermodynamic parameters of some clusters, as well as capabilities of non-standard ways of using Knudsen cells in the process of synthesis of new clusters are presented herein.
T2  - Hemijska industrija
T1  - Mass Spectrometric Production of Heterogeneous Metal Clusters Using Knudsen Cell
VL  - 70
IS  - 6
SP  - 629
EP  - 637
DO  - 10.2298/HEMIND150922070V
ER  - 

@article{
author = "Veljković, Filip M. and Perić-Grujić, Aleksandra A. and Veličković, Suzana",
year = "2016",
abstract = "Knudsen effusion mass spectrometry or high-temperature method of mass spectrometry for decades gives new information about saturated vapor of hardly volatile compounds and it is an important method in the discovery of many new molecules, radicals, ions and clusters present in the gas phase. Since pioneering works until now, this method has been successfully applied to a large number of systems (ores, oxides, ceramics, glass materials, borides, carbides, sulfides, nitrates, metals, fullerenes, etc.) which led to the establishment of various research branches such as chemistry of clusters. This paper describes the basic principles of Knudsen cell use for both identification of chemical species created in the process of evaporation and determination of their ionization energies. Depending on detected ions intensities and the partial pressure of each gaseous component, as well as on changes in partial pressure with temperature, Knudsen cell mass spectrometry enables the determination of thermodynamic parameters of the tested system. A special attention is paid to its application in the field of small heterogeneous and homogeneous clusters of alkali metals. Furthermore, experimental results for thermodynamic parameters of some clusters, as well as capabilities of non-standard ways of using Knudsen cells in the process of synthesis of new clusters are presented herein.",
journal = "Hemijska industrija",
title = "Mass Spectrometric Production of Heterogeneous Metal Clusters Using Knudsen Cell",
volume = "70",
number = "6",
pages = "629-637",
doi = "10.2298/HEMIND150922070V"
}

Veljković, F. M., Perić-Grujić, A. A.,& Veličković, S.. (2016). Mass Spectrometric Production of Heterogeneous Metal Clusters Using Knudsen Cell. in Hemijska industrija, 70(6), 629-637.
https://doi.org/10.2298/HEMIND150922070V

Veljković FM, Perić-Grujić AA, Veličković S. Mass Spectrometric Production of Heterogeneous Metal Clusters Using Knudsen Cell. in Hemijska industrija. 2016;70(6):629-637.
doi:10.2298/HEMIND150922070V .

Veljković, Filip M., Perić-Grujić, Aleksandra A., Veličković, Suzana, "Mass Spectrometric Production of Heterogeneous Metal Clusters Using Knudsen Cell" in Hemijska industrija, 70, no. 6 (2016):629-637,
https://doi.org/10.2298/HEMIND150922070V . .

TY  - JOUR
AU  - Surudžić, Rade D.
AU  - Janković, Ana
AU  - Bibić, Nataša M.
AU  - Vukašinović-Sekulić, Maja
AU  - Perić-Grujić, Aleksandra A.
AU  - Mišković-Stanković, Vesna B.
AU  - Park, Soo Jin
AU  - Rhee, Kyong Yop
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/865
AB  - Silver/poly(vinyl alcohol) and silver/poly(vinyl alcohol)/graphene nanocomposites in different forms (colloid dispersion, thin films and hydrogel discs) were synthesized by electrochemical reduction of Ag+ ions at constant current density. CV, Raman, XRD, FT-IR, and XPS analyses were used to characterize the interactions between silver nanoparticles, PVA molecules, and graphene. Ag/PVA/Gr nanocomposites had better mechanical and thermal properties and higher antibacterial activity against Staphylococcus aureus and Escherichia coli than Ag/PVA nanocomposites. Slow silver release, as well as a high remaining silver content (76%) after 28 days in simulated body fluid confirmed that both Ag/PVA and Ag/PVA/Gr nanocomposites are capable of maintaining sterility over time. (C) 2015 Elsevier Ltd. All rights reserved.
PB  - Elsevier
T2  - Composites: Part B: Engineering
T1  - Physico-chemical and mechanical properties and antibacterial activity of silver/poly(vinyl alcohol)/graphene nanocomposites obtained by electrochemical method
VL  - 85
SP  - 102
EP  - 112
DO  - 10.1016/j.compositesb.2015.09.029
ER  - 

@article{
author = "Surudžić, Rade D. and Janković, Ana and Bibić, Nataša M. and Vukašinović-Sekulić, Maja and Perić-Grujić, Aleksandra A. and Mišković-Stanković, Vesna B. and Park, Soo Jin and Rhee, Kyong Yop",
year = "2016",
abstract = "Silver/poly(vinyl alcohol) and silver/poly(vinyl alcohol)/graphene nanocomposites in different forms (colloid dispersion, thin films and hydrogel discs) were synthesized by electrochemical reduction of Ag+ ions at constant current density. CV, Raman, XRD, FT-IR, and XPS analyses were used to characterize the interactions between silver nanoparticles, PVA molecules, and graphene. Ag/PVA/Gr nanocomposites had better mechanical and thermal properties and higher antibacterial activity against Staphylococcus aureus and Escherichia coli than Ag/PVA nanocomposites. Slow silver release, as well as a high remaining silver content (76%) after 28 days in simulated body fluid confirmed that both Ag/PVA and Ag/PVA/Gr nanocomposites are capable of maintaining sterility over time. (C) 2015 Elsevier Ltd. All rights reserved.",
publisher = "Elsevier",
journal = "Composites: Part B: Engineering",
title = "Physico-chemical and mechanical properties and antibacterial activity of silver/poly(vinyl alcohol)/graphene nanocomposites obtained by electrochemical method",
volume = "85",
pages = "102-112",
doi = "10.1016/j.compositesb.2015.09.029"
}

Surudžić, R. D., Janković, A., Bibić, N. M., Vukašinović-Sekulić, M., Perić-Grujić, A. A., Mišković-Stanković, V. B., Park, S. J.,& Rhee, K. Y.. (2016). Physico-chemical and mechanical properties and antibacterial activity of silver/poly(vinyl alcohol)/graphene nanocomposites obtained by electrochemical method. in Composites: Part B: Engineering
Elsevier., 85, 102-112.
https://doi.org/10.1016/j.compositesb.2015.09.029

Surudžić RD, Janković A, Bibić NM, Vukašinović-Sekulić M, Perić-Grujić AA, Mišković-Stanković VB, Park SJ, Rhee KY. Physico-chemical and mechanical properties and antibacterial activity of silver/poly(vinyl alcohol)/graphene nanocomposites obtained by electrochemical method. in Composites: Part B: Engineering. 2016;85:102-112.
doi:10.1016/j.compositesb.2015.09.029 .

Surudžić, Rade D., Janković, Ana, Bibić, Nataša M., Vukašinović-Sekulić, Maja, Perić-Grujić, Aleksandra A., Mišković-Stanković, Vesna B., Park, Soo Jin, Rhee, Kyong Yop, "Physico-chemical and mechanical properties and antibacterial activity of silver/poly(vinyl alcohol)/graphene nanocomposites obtained by electrochemical method" in Composites: Part B: Engineering, 85 (2016):102-112,
https://doi.org/10.1016/j.compositesb.2015.09.029 . .

TY  - JOUR
AU  - Krstić, Jelena
AU  - Spasojević, Jelena P.
AU  - Radosavljević, Aleksandra
AU  - Perić-Grujić, Aleksandra A.
AU  - Duric, Momcilo
AU  - Kačarević-Popović, Zorica M.
AU  - Popovic, Srdan
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5910
AB  - A nanosilver (nano-Ag)/poly(vinyl alcohol) (PVA) hydrogel device was synthesized with irradiation because it is a highly suitable tool for enhanced nano-Ag technologies and biocompatible controlled release formulations. The amount of the Ag+ ions released in vitro by the nano-Ag/PVA hydrogel device was in the antimicrobial parts per million concentration range. The modeling of the Ag+ ion release kinetics with the elements of the drug-delivery paradigm revealed the best fit solution (R-2 GT 0.99) for the Kopcha and Makoid-Banakars pharmacokinetic dissolution models. The term A/B, derived from the Kopcha model, indicated that the nano-Ag/PVA hydrogel was mainly an Ag+-ion diffusion-controlled device. Makoid-Banakars parameter and the short time approximated Ag+-ion diffusion constant reflected the importance of the size of the Ag nanoparticles. However, it appeared that the cell oxidation potential of the Ag nanoparticles depended on the diffusion characteristics of the fluid penetrating into the Ag/PVA nanosystem. (c) 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40321.
T2  - Journal of Applied Polymer Science
T1  - In Vitro Silver Ion Release Kinetics from Nanosilver/Poly(vinyl alcohol) Hydrogels Synthesized by Gamma Irradiation
VL  - 131
IS  - 11
DO  - 10.1002/app.40321
ER  - 

@article{
author = "Krstić, Jelena and Spasojević, Jelena P. and Radosavljević, Aleksandra and Perić-Grujić, Aleksandra A. and Duric, Momcilo and Kačarević-Popović, Zorica M. and Popovic, Srdan",
year = "2014",
abstract = "A nanosilver (nano-Ag)/poly(vinyl alcohol) (PVA) hydrogel device was synthesized with irradiation because it is a highly suitable tool for enhanced nano-Ag technologies and biocompatible controlled release formulations. The amount of the Ag+ ions released in vitro by the nano-Ag/PVA hydrogel device was in the antimicrobial parts per million concentration range. The modeling of the Ag+ ion release kinetics with the elements of the drug-delivery paradigm revealed the best fit solution (R-2 GT 0.99) for the Kopcha and Makoid-Banakars pharmacokinetic dissolution models. The term A/B, derived from the Kopcha model, indicated that the nano-Ag/PVA hydrogel was mainly an Ag+-ion diffusion-controlled device. Makoid-Banakars parameter and the short time approximated Ag+-ion diffusion constant reflected the importance of the size of the Ag nanoparticles. However, it appeared that the cell oxidation potential of the Ag nanoparticles depended on the diffusion characteristics of the fluid penetrating into the Ag/PVA nanosystem. (c) 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40321.",
journal = "Journal of Applied Polymer Science",
title = "In Vitro Silver Ion Release Kinetics from Nanosilver/Poly(vinyl alcohol) Hydrogels Synthesized by Gamma Irradiation",
volume = "131",
number = "11",
doi = "10.1002/app.40321"
}

Krstić, J., Spasojević, J. P., Radosavljević, A., Perić-Grujić, A. A., Duric, M., Kačarević-Popović, Z. M.,& Popovic, S.. (2014). In Vitro Silver Ion Release Kinetics from Nanosilver/Poly(vinyl alcohol) Hydrogels Synthesized by Gamma Irradiation. in Journal of Applied Polymer Science, 131(11).
https://doi.org/10.1002/app.40321

Krstić J, Spasojević JP, Radosavljević A, Perić-Grujić AA, Duric M, Kačarević-Popović ZM, Popovic S. In Vitro Silver Ion Release Kinetics from Nanosilver/Poly(vinyl alcohol) Hydrogels Synthesized by Gamma Irradiation. in Journal of Applied Polymer Science. 2014;131(11).
doi:10.1002/app.40321 .

Krstić, Jelena, Spasojević, Jelena P., Radosavljević, Aleksandra, Perić-Grujić, Aleksandra A., Duric, Momcilo, Kačarević-Popović, Zorica M., Popovic, Srdan, "In Vitro Silver Ion Release Kinetics from Nanosilver/Poly(vinyl alcohol) Hydrogels Synthesized by Gamma Irradiation" in Journal of Applied Polymer Science, 131, no. 11 (2014),
https://doi.org/10.1002/app.40321 . .

TY  - JOUR
AU  - Dimić, Ivana 
AU  - Cvijović-Alagić, Ivana
AU  - Kostic, Ivana T.
AU  - Perić-Grujić, Aleksandra A.
AU  - Rakin, Marko P.
AU  - Putić, Slaviša S.
AU  - Bugarski, Branko M.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/310
AB  - Metallic biomaterials, which are mainly used for the damaged hard tissue replacements, are materials with high strength, excellent toughness and good wear resistance. The disadvantages of metals as implant materials are their susceptibility to corrosion, the elastic modulus mismatch between metals and human hard tissues, relatively high density and metallic ion release, which can cause serious health problems. The aim of this study was to examine metallic ion release from Co-Cr-Mo alloy in artificial saliva. In that purpose, alloy samples were immersed into artificial saliva with different pH values (4.0, 5.5 and 7.5). After a certain immersion period (1, 3 and 6 weeks) the concentrations of released ions were determined using inductively coupled plasma-mass spectrometry (ICP-MS). The research findings were used in order to define the dependence between the concentration of released metallic ions, artificial saliva pH values and immersion time. The determined released metallic ions concentrations were compared with literature data in order to describe and better understand the phenomenon of metallic ion release from the biocom-patible cobalt-based alloy.
AB  - Metalni biomaterijali, koji se najčešće koriste za zamenu oštećenih čvrstih tkiva u organizmu čoveka, su materijali velike čvrstoće, žilavosti i otpornosti prema habanju. Nedostaci metala, kao implantnih materijala, su njihova podložnost koroziji, neusklađenost modula elastičnosti metala i čvrstih ljudskih tkiva, velika gustina i otpuštanje metalnih jona koje može da izazove ozbiljne zdravstvene probleme. Cilj ovog rada je bio da se ispita otpuštanje metalnih jona iz Co-Cr-Mo legure u rastvoru veštačke pljuvačke. Uzorci legure su potopljeni u rastvor veštačke pljuvačke različite pH vrednosti (4,0, 5,5 i 7,5). Nakon određenog vremena izlaganja legure veštačkoj pljuvačci (1, 3 i 6 nedelja) određene su koncentracije otpuštenih jona primenom indukcije spregnute plazme sa masenom spektrometrijom (ICP-MS). Dobijeni rezultati su iskorišćeni u cilju definisanja zavisnosti između koncentracije otpuštenih jona, pH vrednosti veštačke pljuvačke i dužine potapanja legure u rastvor veštačke pljuvačke. Osim toga, utvrđene koncentracije otpuštenih metalnih jona iz ispitivane legure su upoređene sa podacima dostupnim u literaturi u cilju što boljeg opisivanja i razumevanja fenomena otpuštanja metalnih jona iz biokompatibilne Co-Cr-Mo legure.
T2  - Chemical Industry and Chemical Engineering Quarterly / CICEQ
T1  - Metallic Ion Release from Biocompatible Cobalt-Based Alloy
VL  - 20
IS  - 4
SP  - 571
EP  - 577
DO  - 10.2298/CICEQ130813039D
ER  - 

@article{
author = "Dimić, Ivana  and Cvijović-Alagić, Ivana and Kostic, Ivana T. and Perić-Grujić, Aleksandra A. and Rakin, Marko P. and Putić, Slaviša S. and Bugarski, Branko M.",
year = "2014",
abstract = "Metallic biomaterials, which are mainly used for the damaged hard tissue replacements, are materials with high strength, excellent toughness and good wear resistance. The disadvantages of metals as implant materials are their susceptibility to corrosion, the elastic modulus mismatch between metals and human hard tissues, relatively high density and metallic ion release, which can cause serious health problems. The aim of this study was to examine metallic ion release from Co-Cr-Mo alloy in artificial saliva. In that purpose, alloy samples were immersed into artificial saliva with different pH values (4.0, 5.5 and 7.5). After a certain immersion period (1, 3 and 6 weeks) the concentrations of released ions were determined using inductively coupled plasma-mass spectrometry (ICP-MS). The research findings were used in order to define the dependence between the concentration of released metallic ions, artificial saliva pH values and immersion time. The determined released metallic ions concentrations were compared with literature data in order to describe and better understand the phenomenon of metallic ion release from the biocom-patible cobalt-based alloy., Metalni biomaterijali, koji se najčešće koriste za zamenu oštećenih čvrstih tkiva u organizmu čoveka, su materijali velike čvrstoće, žilavosti i otpornosti prema habanju. Nedostaci metala, kao implantnih materijala, su njihova podložnost koroziji, neusklađenost modula elastičnosti metala i čvrstih ljudskih tkiva, velika gustina i otpuštanje metalnih jona koje može da izazove ozbiljne zdravstvene probleme. Cilj ovog rada je bio da se ispita otpuštanje metalnih jona iz Co-Cr-Mo legure u rastvoru veštačke pljuvačke. Uzorci legure su potopljeni u rastvor veštačke pljuvačke različite pH vrednosti (4,0, 5,5 i 7,5). Nakon određenog vremena izlaganja legure veštačkoj pljuvačci (1, 3 i 6 nedelja) određene su koncentracije otpuštenih jona primenom indukcije spregnute plazme sa masenom spektrometrijom (ICP-MS). Dobijeni rezultati su iskorišćeni u cilju definisanja zavisnosti između koncentracije otpuštenih jona, pH vrednosti veštačke pljuvačke i dužine potapanja legure u rastvor veštačke pljuvačke. Osim toga, utvrđene koncentracije otpuštenih metalnih jona iz ispitivane legure su upoređene sa podacima dostupnim u literaturi u cilju što boljeg opisivanja i razumevanja fenomena otpuštanja metalnih jona iz biokompatibilne Co-Cr-Mo legure.",
journal = "Chemical Industry and Chemical Engineering Quarterly / CICEQ",
title = "Metallic Ion Release from Biocompatible Cobalt-Based Alloy",
volume = "20",
number = "4",
pages = "571-577",
doi = "10.2298/CICEQ130813039D"
}

Dimić, I., Cvijović-Alagić, I., Kostic, I. T., Perić-Grujić, A. A., Rakin, M. P., Putić, S. S.,& Bugarski, B. M.. (2014). Metallic Ion Release from Biocompatible Cobalt-Based Alloy. in Chemical Industry and Chemical Engineering Quarterly / CICEQ, 20(4), 571-577.
https://doi.org/10.2298/CICEQ130813039D

Dimić I, Cvijović-Alagić I, Kostic IT, Perić-Grujić AA, Rakin MP, Putić SS, Bugarski BM. Metallic Ion Release from Biocompatible Cobalt-Based Alloy. in Chemical Industry and Chemical Engineering Quarterly / CICEQ. 2014;20(4):571-577.
doi:10.2298/CICEQ130813039D .

Dimić, Ivana , Cvijović-Alagić, Ivana, Kostic, Ivana T., Perić-Grujić, Aleksandra A., Rakin, Marko P., Putić, Slaviša S., Bugarski, Branko M., "Metallic Ion Release from Biocompatible Cobalt-Based Alloy" in Chemical Industry and Chemical Engineering Quarterly / CICEQ, 20, no. 4 (2014):571-577,
https://doi.org/10.2298/CICEQ130813039D . .

TY  - JOUR
AU  - Markovski, Jasmina S.
AU  - Đokić, Veljko R.
AU  - Milosavljevic, Milutin
AU  - Mitrić, Miodrag
AU  - Perić-Grujić, Aleksandra A.
AU  - Onjia, Antonije E.
AU  - Marinković, Aleksandar D.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5838
AB  - A highly porous calcium carbonate (calcite; sorbent 1) was used as a support for modification with alpha-FeOOH (calcite/goethite; sorbent 2), alpha-MnO2 (calcite/alpha-MnO2; sorbent 3) and alpha-FeOOH/alpha-MnO2 (calcite/goethite/alpha-MnO2; sorbent 4) in order to obtain a cheap hybrid materials for simple and effective arsenate removal from aqueous solutions. The adsorption ability of synthesized adsorbents was studied as a function of functionalization methods, pH, contact time, temperature and ultrasonic treatment. Comparison of the adsorptive effectiveness of synthesized adsorbents for arsenate removal, under ultrasound treatment and classical stirring method, has shown better performance of the former one reaching maximum adsorption capacities of 1.73, 21.00, 10.36 and 41.94 mg g(-1), for sorbents 1-4, respectively. Visual MINTEQ equilibrium speciation modeling was used for prediction of pH and interfering ion influences on arsenate adsorption. (C) 2013 Elsevier B.V. All rights reserved.
T2  - Ultrasonics Sonochemistry
T1  - Ultrasonic assisted arsenate adsorption on solvothermally synthesized calcite modified by goethite, alpha-MnO2 and goethite/alpha-MnO2
VL  - 21
IS  - 2
SP  - 790
EP  - 801
DO  - 10.1016/j.ultsonch.2013.10.006
ER  - 

@article{
author = "Markovski, Jasmina S. and Đokić, Veljko R. and Milosavljevic, Milutin and Mitrić, Miodrag and Perić-Grujić, Aleksandra A. and Onjia, Antonije E. and Marinković, Aleksandar D.",
year = "2014",
abstract = "A highly porous calcium carbonate (calcite; sorbent 1) was used as a support for modification with alpha-FeOOH (calcite/goethite; sorbent 2), alpha-MnO2 (calcite/alpha-MnO2; sorbent 3) and alpha-FeOOH/alpha-MnO2 (calcite/goethite/alpha-MnO2; sorbent 4) in order to obtain a cheap hybrid materials for simple and effective arsenate removal from aqueous solutions. The adsorption ability of synthesized adsorbents was studied as a function of functionalization methods, pH, contact time, temperature and ultrasonic treatment. Comparison of the adsorptive effectiveness of synthesized adsorbents for arsenate removal, under ultrasound treatment and classical stirring method, has shown better performance of the former one reaching maximum adsorption capacities of 1.73, 21.00, 10.36 and 41.94 mg g(-1), for sorbents 1-4, respectively. Visual MINTEQ equilibrium speciation modeling was used for prediction of pH and interfering ion influences on arsenate adsorption. (C) 2013 Elsevier B.V. All rights reserved.",
journal = "Ultrasonics Sonochemistry",
title = "Ultrasonic assisted arsenate adsorption on solvothermally synthesized calcite modified by goethite, alpha-MnO2 and goethite/alpha-MnO2",
volume = "21",
number = "2",
pages = "790-801",
doi = "10.1016/j.ultsonch.2013.10.006"
}

Markovski, J. S., Đokić, V. R., Milosavljevic, M., Mitrić, M., Perić-Grujić, A. A., Onjia, A. E.,& Marinković, A. D.. (2014). Ultrasonic assisted arsenate adsorption on solvothermally synthesized calcite modified by goethite, alpha-MnO2 and goethite/alpha-MnO2. in Ultrasonics Sonochemistry, 21(2), 790-801.
https://doi.org/10.1016/j.ultsonch.2013.10.006

Markovski JS, Đokić VR, Milosavljevic M, Mitrić M, Perić-Grujić AA, Onjia AE, Marinković AD. Ultrasonic assisted arsenate adsorption on solvothermally synthesized calcite modified by goethite, alpha-MnO2 and goethite/alpha-MnO2. in Ultrasonics Sonochemistry. 2014;21(2):790-801.
doi:10.1016/j.ultsonch.2013.10.006 .

Markovski, Jasmina S., Đokić, Veljko R., Milosavljevic, Milutin, Mitrić, Miodrag, Perić-Grujić, Aleksandra A., Onjia, Antonije E., Marinković, Aleksandar D., "Ultrasonic assisted arsenate adsorption on solvothermally synthesized calcite modified by goethite, alpha-MnO2 and goethite/alpha-MnO2" in Ultrasonics Sonochemistry, 21, no. 2 (2014):790-801,
https://doi.org/10.1016/j.ultsonch.2013.10.006 . .

TY  - JOUR
AU  - Smičiklas, Ivana D.
AU  - Smiljanić, Slavko N.
AU  - Perić-Grujić, Aleksandra A.
AU  - Šljivić-Ivanović, Marija Z.
AU  - Mitrić, Miodrag
AU  - Antonović, Dušan
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5942
AB  - Red mud, a heterogeneous mineral waste from aluminum industry, can be beneficially utilized as a sorbent. High alkalinity and the amount of water soluble ions can limit some of its applications. This studys aim was to explore and correlate physicochemical properties and sorption efficiencies of acid treated red mud. Sorbents (BRM0.05-BRM1), obtained by varying HCl concentration (0.05-1 mol/L), were characterized in terms of mineralogical composition, surface functional groups, electrical conductivity (EC) and the point of zero charge (pH(PZC)). Removal of Ni(II) ions was tested in batch conditions. Sorbents EC and pH(PZC) values decreased with the increase of acid concentration. Structural analysis revealed that sodalite and calcite phases were completely lost starting from the samples BRM0.25 and BRM0.5, respectively. Along with the sodalite dissolution, gibbsite precipitation was observed. Ni(II) sorption increased with the increase of initial pH from 2 to 4, while at pH GT 4 it depended only on sorbent material. A radical drop of maximum sorption capacities was associated with the increase of acid concentration to 0.25 mol/L, whereas additional rise to 1 mol/L caused minor fluctuations. Fully loaded sorbents BRM0.25-BRM0.1 also exhibited considerable lower stability over a range of investigated pH conditions. Dissolution of sodalite and calcite, and the consequent reduction of buffering capacities can be identified as the main reasons for decreasing sorption efficiency. Sample BRM0.05 was efficient in terms of both sorption and stability, yet environmentally more benign than the original red mud due to the lower alkalinity and content of water soluble ions. (C) 2013 Elsevier B.V. All rights reserved.
T2  - Chemical Engineering Journal
T1  - Effect of acid treatment on red mud properties with implications on Ni(II) sorption and stability
VL  - 242
SP  - 27
EP  - 35
DO  - 10.1016/j.cej.2013.12.079
ER  - 

@article{
author = "Smičiklas, Ivana D. and Smiljanić, Slavko N. and Perić-Grujić, Aleksandra A. and Šljivić-Ivanović, Marija Z. and Mitrić, Miodrag and Antonović, Dušan",
year = "2014",
abstract = "Red mud, a heterogeneous mineral waste from aluminum industry, can be beneficially utilized as a sorbent. High alkalinity and the amount of water soluble ions can limit some of its applications. This studys aim was to explore and correlate physicochemical properties and sorption efficiencies of acid treated red mud. Sorbents (BRM0.05-BRM1), obtained by varying HCl concentration (0.05-1 mol/L), were characterized in terms of mineralogical composition, surface functional groups, electrical conductivity (EC) and the point of zero charge (pH(PZC)). Removal of Ni(II) ions was tested in batch conditions. Sorbents EC and pH(PZC) values decreased with the increase of acid concentration. Structural analysis revealed that sodalite and calcite phases were completely lost starting from the samples BRM0.25 and BRM0.5, respectively. Along with the sodalite dissolution, gibbsite precipitation was observed. Ni(II) sorption increased with the increase of initial pH from 2 to 4, while at pH GT 4 it depended only on sorbent material. A radical drop of maximum sorption capacities was associated with the increase of acid concentration to 0.25 mol/L, whereas additional rise to 1 mol/L caused minor fluctuations. Fully loaded sorbents BRM0.25-BRM0.1 also exhibited considerable lower stability over a range of investigated pH conditions. Dissolution of sodalite and calcite, and the consequent reduction of buffering capacities can be identified as the main reasons for decreasing sorption efficiency. Sample BRM0.05 was efficient in terms of both sorption and stability, yet environmentally more benign than the original red mud due to the lower alkalinity and content of water soluble ions. (C) 2013 Elsevier B.V. All rights reserved.",
journal = "Chemical Engineering Journal",
title = "Effect of acid treatment on red mud properties with implications on Ni(II) sorption and stability",
volume = "242",
pages = "27-35",
doi = "10.1016/j.cej.2013.12.079"
}

Smičiklas, I. D., Smiljanić, S. N., Perić-Grujić, A. A., Šljivić-Ivanović, M. Z., Mitrić, M.,& Antonović, D.. (2014). Effect of acid treatment on red mud properties with implications on Ni(II) sorption and stability. in Chemical Engineering Journal, 242, 27-35.
https://doi.org/10.1016/j.cej.2013.12.079

Smičiklas ID, Smiljanić SN, Perić-Grujić AA, Šljivić-Ivanović MZ, Mitrić M, Antonović D. Effect of acid treatment on red mud properties with implications on Ni(II) sorption and stability. in Chemical Engineering Journal. 2014;242:27-35.
doi:10.1016/j.cej.2013.12.079 .

Smičiklas, Ivana D., Smiljanić, Slavko N., Perić-Grujić, Aleksandra A., Šljivić-Ivanović, Marija Z., Mitrić, Miodrag, Antonović, Dušan, "Effect of acid treatment on red mud properties with implications on Ni(II) sorption and stability" in Chemical Engineering Journal, 242 (2014):27-35,
https://doi.org/10.1016/j.cej.2013.12.079 . .

TY  - JOUR
AU  - Jovanović, Željka
AU  - Radosavljević, Aleksandra
AU  - Kačarević-Popović, Zorica M.
AU  - Stojkovska, Jasmina
AU  - Perić-Grujić, Aleksandra A.
AU  - Ristić, Mirjana
AU  - Matić, Ivana Z.
AU  - Juranić, Zorica D.
AU  - Obradović, Bojana
AU  - Mišković-Stanković, Vesna B.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5379
AB  - Silver/poly(N-vinyl-2-pyrrolidone) (Ag/PVP) nanocomposites containing Ag nanoparticles at different concentrations were synthesized using gamma-irradiation. Cytotoxicity of the obtained nanocomposites was determined by MU assay in monolayer cultures of normal human immunocompetent peripheral blood mononuclear cells (PBMC) that were either non-stimulated or stimulated to proliferate by mitogen phytohemagglutinin (PHA), as well as in human cervix adenocarcinoma cell (HeLa) cultures. Silver release kinetics and mechanical properties of nanocomposites were investigated under bioreactor conditions in the simulated body fluid (SBF) at 37 degrees C. The release of silver was monitored under static conditions, and in two types of bioreactors: perfusion bioreactors and a bioreactor with dynamic compression coupled with SBF perfusion simulating in vivo conditions in articular cartilage. Ag/PVP nanocomposites exhibited slight cytotoxic effects against PBMC at the estimated concentration of 0.4 mu mol dm(-3), with negligible variations observed amongst different cell cultures investigated. Studies of the silver release kinetics indicated internal diffusion as the rate limiting step, determined by statistically comparable results obtained at all investigated conditions. However, silver release rate was slightly higher in the bioreactor with dynamic compression coupled with SBF perfusion as compared to the other two systems indicating the influence of dynamic compression. Modelling of silver release kinetics revealed potentials for optimization of Ag/PVP nanocomposites for particular applications as wound dressings or soft tissue implants. (C) 2013 Elsevier B.V. All rights reserved.
T2  - Colloids and Surfaces. B: Biointerfaces
T1  - Bioreactor validation and biocompatibility of Ag/poly(N-vinyl-2-pyrrolidone) hydrogel nanocomposites
VL  - 105
SP  - 230
EP  - 235
DO  - 10.1016/j.colsurfb.2012.12.055
ER  - 

@article{
author = "Jovanović, Željka and Radosavljević, Aleksandra and Kačarević-Popović, Zorica M. and Stojkovska, Jasmina and Perić-Grujić, Aleksandra A. and Ristić, Mirjana and Matić, Ivana Z. and Juranić, Zorica D. and Obradović, Bojana and Mišković-Stanković, Vesna B.",
year = "2013",
abstract = "Silver/poly(N-vinyl-2-pyrrolidone) (Ag/PVP) nanocomposites containing Ag nanoparticles at different concentrations were synthesized using gamma-irradiation. Cytotoxicity of the obtained nanocomposites was determined by MU assay in monolayer cultures of normal human immunocompetent peripheral blood mononuclear cells (PBMC) that were either non-stimulated or stimulated to proliferate by mitogen phytohemagglutinin (PHA), as well as in human cervix adenocarcinoma cell (HeLa) cultures. Silver release kinetics and mechanical properties of nanocomposites were investigated under bioreactor conditions in the simulated body fluid (SBF) at 37 degrees C. The release of silver was monitored under static conditions, and in two types of bioreactors: perfusion bioreactors and a bioreactor with dynamic compression coupled with SBF perfusion simulating in vivo conditions in articular cartilage. Ag/PVP nanocomposites exhibited slight cytotoxic effects against PBMC at the estimated concentration of 0.4 mu mol dm(-3), with negligible variations observed amongst different cell cultures investigated. Studies of the silver release kinetics indicated internal diffusion as the rate limiting step, determined by statistically comparable results obtained at all investigated conditions. However, silver release rate was slightly higher in the bioreactor with dynamic compression coupled with SBF perfusion as compared to the other two systems indicating the influence of dynamic compression. Modelling of silver release kinetics revealed potentials for optimization of Ag/PVP nanocomposites for particular applications as wound dressings or soft tissue implants. (C) 2013 Elsevier B.V. All rights reserved.",
journal = "Colloids and Surfaces. B: Biointerfaces",
title = "Bioreactor validation and biocompatibility of Ag/poly(N-vinyl-2-pyrrolidone) hydrogel nanocomposites",
volume = "105",
pages = "230-235",
doi = "10.1016/j.colsurfb.2012.12.055"
}

Jovanović, Ž., Radosavljević, A., Kačarević-Popović, Z. M., Stojkovska, J., Perić-Grujić, A. A., Ristić, M., Matić, I. Z., Juranić, Z. D., Obradović, B.,& Mišković-Stanković, V. B.. (2013). Bioreactor validation and biocompatibility of Ag/poly(N-vinyl-2-pyrrolidone) hydrogel nanocomposites. in Colloids and Surfaces. B: Biointerfaces, 105, 230-235.
https://doi.org/10.1016/j.colsurfb.2012.12.055

Jovanović Ž, Radosavljević A, Kačarević-Popović ZM, Stojkovska J, Perić-Grujić AA, Ristić M, Matić IZ, Juranić ZD, Obradović B, Mišković-Stanković VB. Bioreactor validation and biocompatibility of Ag/poly(N-vinyl-2-pyrrolidone) hydrogel nanocomposites. in Colloids and Surfaces. B: Biointerfaces. 2013;105:230-235.
doi:10.1016/j.colsurfb.2012.12.055 .

Jovanović, Željka, Radosavljević, Aleksandra, Kačarević-Popović, Zorica M., Stojkovska, Jasmina, Perić-Grujić, Aleksandra A., Ristić, Mirjana, Matić, Ivana Z., Juranić, Zorica D., Obradović, Bojana, Mišković-Stanković, Vesna B., "Bioreactor validation and biocompatibility of Ag/poly(N-vinyl-2-pyrrolidone) hydrogel nanocomposites" in Colloids and Surfaces. B: Biointerfaces, 105 (2013):230-235,
https://doi.org/10.1016/j.colsurfb.2012.12.055 . .

TY  - JOUR
AU  - Smičiklas, Ivana D.
AU  - Smiljanić, Slavko N.
AU  - Perić-Grujić, Aleksandra A.
AU  - Šljivić-Ivanović, Marija Z.
AU  - Antonović, Dušan
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5334
AB  - The removal of Ni(II) from aqueous solutions by raw red mud powder was studied in the absence and in the presence of citrate ligand, as a function of process parameters. Using lower initial Ni(II) concentration (10(-3) mol/L) detectable amounts were found only at initial pH 3, whereas for higher concentration (2 x 10(-3) mol/L) removal increased simultaneously with pH in the range 3-4 and at pH GT 8. Process efficiency was suppressed in the presence of citrate. However, at Ni/Citrate molar ratios 1:0.25 and 1:0.5, 10-20% decrease was noticed in acidic media, while the negative influence diminished with the rise of pH. At higher ligand rates, formation of stable aqueous complex between Ni(II) and citrate significantly reduced metal removal in the whole tested initial pH range (3-10). Due to instantaneous pH rise above 8, removal of Ni(II) from 10(-3) mol/L solution was completed in 5 min. Kinetic data demonstrated slower Ni(II) uptake using both solutions of higher initial Ni(II) concentrations and Ni/Citrate solutions. At initial pH 5, estimated capacity towards Ni(II) was found to be 27.4 mg/g, without citrate. For Ni/Citrate molar ratios 1:0.25 and 1:0.5, capacities decreased slightly to 25 mg/g and 21 mg/g, whereas at equimolar and higher concentrations, citrate significantly inhibited Ni(II) immobilization (7.6 mg/g and 2.5 mg/g, respectively for Ni/Citrate ratios 1:1 and 1:2). The results demonstrated beneficial effect of red mud high alkalinity on Ni(II) removal. The sorbent satisfactorily immobilize nickel from solutions having initial Ni/Citrate molar ratios lower than 1:1, and neutral to alkaline initial pH. FUR analysis confirmed that red mud can act as a removal agent for Ni(II), Ni/Citrate complex and free citrate ligand. (C) 2012 Elsevier B.V. All rights reserved.
T2  - Chemical Engineering Journal
T1  - The influence of citrate anion on Ni(II) removal by raw red mud from aluminum industry
VL  - 214
SP  - 327
EP  - 335
DO  - 10.1016/j.cej.2012.10.086
ER  - 

@article{
author = "Smičiklas, Ivana D. and Smiljanić, Slavko N. and Perić-Grujić, Aleksandra A. and Šljivić-Ivanović, Marija Z. and Antonović, Dušan",
year = "2013",
abstract = "The removal of Ni(II) from aqueous solutions by raw red mud powder was studied in the absence and in the presence of citrate ligand, as a function of process parameters. Using lower initial Ni(II) concentration (10(-3) mol/L) detectable amounts were found only at initial pH 3, whereas for higher concentration (2 x 10(-3) mol/L) removal increased simultaneously with pH in the range 3-4 and at pH GT 8. Process efficiency was suppressed in the presence of citrate. However, at Ni/Citrate molar ratios 1:0.25 and 1:0.5, 10-20% decrease was noticed in acidic media, while the negative influence diminished with the rise of pH. At higher ligand rates, formation of stable aqueous complex between Ni(II) and citrate significantly reduced metal removal in the whole tested initial pH range (3-10). Due to instantaneous pH rise above 8, removal of Ni(II) from 10(-3) mol/L solution was completed in 5 min. Kinetic data demonstrated slower Ni(II) uptake using both solutions of higher initial Ni(II) concentrations and Ni/Citrate solutions. At initial pH 5, estimated capacity towards Ni(II) was found to be 27.4 mg/g, without citrate. For Ni/Citrate molar ratios 1:0.25 and 1:0.5, capacities decreased slightly to 25 mg/g and 21 mg/g, whereas at equimolar and higher concentrations, citrate significantly inhibited Ni(II) immobilization (7.6 mg/g and 2.5 mg/g, respectively for Ni/Citrate ratios 1:1 and 1:2). The results demonstrated beneficial effect of red mud high alkalinity on Ni(II) removal. The sorbent satisfactorily immobilize nickel from solutions having initial Ni/Citrate molar ratios lower than 1:1, and neutral to alkaline initial pH. FUR analysis confirmed that red mud can act as a removal agent for Ni(II), Ni/Citrate complex and free citrate ligand. (C) 2012 Elsevier B.V. All rights reserved.",
journal = "Chemical Engineering Journal",
title = "The influence of citrate anion on Ni(II) removal by raw red mud from aluminum industry",
volume = "214",
pages = "327-335",
doi = "10.1016/j.cej.2012.10.086"
}

Smičiklas, I. D., Smiljanić, S. N., Perić-Grujić, A. A., Šljivić-Ivanović, M. Z.,& Antonović, D.. (2013). The influence of citrate anion on Ni(II) removal by raw red mud from aluminum industry. in Chemical Engineering Journal, 214, 327-335.
https://doi.org/10.1016/j.cej.2012.10.086

Smičiklas ID, Smiljanić SN, Perić-Grujić AA, Šljivić-Ivanović MZ, Antonović D. The influence of citrate anion on Ni(II) removal by raw red mud from aluminum industry. in Chemical Engineering Journal. 2013;214:327-335.
doi:10.1016/j.cej.2012.10.086 .

Smičiklas, Ivana D., Smiljanić, Slavko N., Perić-Grujić, Aleksandra A., Šljivić-Ivanović, Marija Z., Antonović, Dušan, "The influence of citrate anion on Ni(II) removal by raw red mud from aluminum industry" in Chemical Engineering Journal, 214 (2013):327-335,
https://doi.org/10.1016/j.cej.2012.10.086 . .

TY  - JOUR
AU  - Veljković, Filip M.
AU  - Đustebek, Jasmina B.
AU  - Veljković, Miomir V.
AU  - Veličković, Suzana
AU  - Perić-Grujić, Aleksandra A.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4942
AB  - RATIONALE The very small clusters of the type KnF are of particular importance since their first ionization energies (IEs) are lower than those of the alkali metal atoms. Theoretical calculation has demonstrated that this kind of cluster represents a potential building block for cluster-assembly materials with unique structural, electronic, optical, magnetic, and thermodynamic properties. To date, however, there have been no experimental results on the IEs of KnF (n GT 2) clusters. METHOD KnF (n?=?26) clusters were produced by the evaporation of a solid potassium fluoride salt using a modified thermal ionization source of modified design, and mass selected by a magnetic sector mass spectrometer where their IEs were determined. RESULTS Clusters KnF (n?=?36) were detected for the first time. The order of the ion intensities was K2F+ GT ? GT ?K4F+ GT ? GT ?K3F+K6F+? GT ?K5F+. The determined IEs were 3.99 +/- 0.20?eV for K2F, 4.16 +/- 0.20?eV for K3F, 4.27 +/- 0.20?eV for K4F, 4.22 +/- 0.20?eV for K5F, and 4.31 +/- 0.20?eV for K6F. The IEs of KnF increase slightly with the increase in potassium atom number from 2 to 6. We also observed that the presence of a fluorine atom leads to increasing ionization energy of bare metal potassium clusters. CONCLUSIONS The modified thermal ionization source provides an efficient way of obtaining the fluorine-doped potassium clusters. These results also present experimental proof that KnF (n?=?26) clusters belong to the group of superalkali species. Copyright (C)2012 John Wiley and Sons, Ltd.
T2  - Rapid Communications in Mass Spectrometry
T1  - Production and ionization energies of KnF (n=2-6) clusters by thermal ionization mass spectrometry
VL  - 26
IS  - 16
SP  - 1761
EP  - 1766
DO  - 10.1002/rcm.6284
ER  - 

@article{
author = "Veljković, Filip M. and Đustebek, Jasmina B. and Veljković, Miomir V. and Veličković, Suzana and Perić-Grujić, Aleksandra A.",
year = "2012",
abstract = "RATIONALE The very small clusters of the type KnF are of particular importance since their first ionization energies (IEs) are lower than those of the alkali metal atoms. Theoretical calculation has demonstrated that this kind of cluster represents a potential building block for cluster-assembly materials with unique structural, electronic, optical, magnetic, and thermodynamic properties. To date, however, there have been no experimental results on the IEs of KnF (n GT 2) clusters. METHOD KnF (n?=?26) clusters were produced by the evaporation of a solid potassium fluoride salt using a modified thermal ionization source of modified design, and mass selected by a magnetic sector mass spectrometer where their IEs were determined. RESULTS Clusters KnF (n?=?36) were detected for the first time. The order of the ion intensities was K2F+ GT ? GT ?K4F+ GT ? GT ?K3F+K6F+? GT ?K5F+. The determined IEs were 3.99 +/- 0.20?eV for K2F, 4.16 +/- 0.20?eV for K3F, 4.27 +/- 0.20?eV for K4F, 4.22 +/- 0.20?eV for K5F, and 4.31 +/- 0.20?eV for K6F. The IEs of KnF increase slightly with the increase in potassium atom number from 2 to 6. We also observed that the presence of a fluorine atom leads to increasing ionization energy of bare metal potassium clusters. CONCLUSIONS The modified thermal ionization source provides an efficient way of obtaining the fluorine-doped potassium clusters. These results also present experimental proof that KnF (n?=?26) clusters belong to the group of superalkali species. Copyright (C)2012 John Wiley and Sons, Ltd.",
journal = "Rapid Communications in Mass Spectrometry",
title = "Production and ionization energies of KnF (n=2-6) clusters by thermal ionization mass spectrometry",
volume = "26",
number = "16",
pages = "1761-1766",
doi = "10.1002/rcm.6284"
}

Veljković, F. M., Đustebek, J. B., Veljković, M. V., Veličković, S.,& Perić-Grujić, A. A.. (2012). Production and ionization energies of KnF (n=2-6) clusters by thermal ionization mass spectrometry. in Rapid Communications in Mass Spectrometry, 26(16), 1761-1766.
https://doi.org/10.1002/rcm.6284

Veljković FM, Đustebek JB, Veljković MV, Veličković S, Perić-Grujić AA. Production and ionization energies of KnF (n=2-6) clusters by thermal ionization mass spectrometry. in Rapid Communications in Mass Spectrometry. 2012;26(16):1761-1766.
doi:10.1002/rcm.6284 .

Veljković, Filip M., Đustebek, Jasmina B., Veljković, Miomir V., Veličković, Suzana, Perić-Grujić, Aleksandra A., "Production and ionization energies of KnF (n=2-6) clusters by thermal ionization mass spectrometry" in Rapid Communications in Mass Spectrometry, 26, no. 16 (2012):1761-1766,
https://doi.org/10.1002/rcm.6284 . .

TY  - JOUR
AU  - Veljković, Filip M.
AU  - Đustebek, Jasmina B.
AU  - Veljković, Miomir V.
AU  - Perić-Grujić, Aleksandra A.
AU  - Veličković, Suzana
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5164
AB  - The theoretical calculations have predicted that nonmetal-doped potassium clusters can be used in the synthesis of a new class of charge-transfer salts which can be considered as potential building blocks for the assembly of novel nanostructured material. In this work, KnCl (n?=?26) and KnCln-1 (n?=?3 and 4) clusters were produced by vaporization of a solid potassium chloride salt in a thermal ionization mass spectrometry. The ionization energies (IEs) were measured, and found to be 3.64?+/-?0.20?eV for K2Cl, 3.67?+/-?0.20?eV for K3Cl, 3.62?+/-?0.20?eV for K4Cl, 3.57?+/-?0.20?eV for K5Cl, 3.69?+/-?0.20?eV for K6Cl, 3.71?+/-?0.20?eV for K3Cl2 and 3.72?+/-?0.20?eV for K4Cl3. The KnCl+ (n?=?36) clusters were detected for the first time in a cluster beam generated by the thermal ionization source of modified design. Also, this work is the first to report experimentally obtained values of IEs for KnCl+ (n?=?36) and KnCln-1+ (n?=?3 and 4) clusters. The ionization energies for KnCl+ and KnCln-1+ clusters are much lower than the 4.34?eV of the potassium atom; hence, these clusters should be classified as superalkali species. Copyright (c) 2012 John Wiley and Sons, Ltd.
T2  - Journal of Mass Spectrometry
T1  - Study of small chlorine-doped potassium clusters by thermal ionization mass spectrometry
VL  - 47
IS  - 11
SP  - 1495
EP  - 1499
DO  - 10.1002/jms.3076
ER  - 

@article{
author = "Veljković, Filip M. and Đustebek, Jasmina B. and Veljković, Miomir V. and Perić-Grujić, Aleksandra A. and Veličković, Suzana",
year = "2012",
abstract = "The theoretical calculations have predicted that nonmetal-doped potassium clusters can be used in the synthesis of a new class of charge-transfer salts which can be considered as potential building blocks for the assembly of novel nanostructured material. In this work, KnCl (n?=?26) and KnCln-1 (n?=?3 and 4) clusters were produced by vaporization of a solid potassium chloride salt in a thermal ionization mass spectrometry. The ionization energies (IEs) were measured, and found to be 3.64?+/-?0.20?eV for K2Cl, 3.67?+/-?0.20?eV for K3Cl, 3.62?+/-?0.20?eV for K4Cl, 3.57?+/-?0.20?eV for K5Cl, 3.69?+/-?0.20?eV for K6Cl, 3.71?+/-?0.20?eV for K3Cl2 and 3.72?+/-?0.20?eV for K4Cl3. The KnCl+ (n?=?36) clusters were detected for the first time in a cluster beam generated by the thermal ionization source of modified design. Also, this work is the first to report experimentally obtained values of IEs for KnCl+ (n?=?36) and KnCln-1+ (n?=?3 and 4) clusters. The ionization energies for KnCl+ and KnCln-1+ clusters are much lower than the 4.34?eV of the potassium atom; hence, these clusters should be classified as superalkali species. Copyright (c) 2012 John Wiley and Sons, Ltd.",
journal = "Journal of Mass Spectrometry",
title = "Study of small chlorine-doped potassium clusters by thermal ionization mass spectrometry",
volume = "47",
number = "11",
pages = "1495-1499",
doi = "10.1002/jms.3076"
}

Veljković, F. M., Đustebek, J. B., Veljković, M. V., Perić-Grujić, A. A.,& Veličković, S.. (2012). Study of small chlorine-doped potassium clusters by thermal ionization mass spectrometry. in Journal of Mass Spectrometry, 47(11), 1495-1499.
https://doi.org/10.1002/jms.3076

Veljković FM, Đustebek JB, Veljković MV, Perić-Grujić AA, Veličković S. Study of small chlorine-doped potassium clusters by thermal ionization mass spectrometry. in Journal of Mass Spectrometry. 2012;47(11):1495-1499.
doi:10.1002/jms.3076 .

Veljković, Filip M., Đustebek, Jasmina B., Veljković, Miomir V., Perić-Grujić, Aleksandra A., Veličković, Suzana, "Study of small chlorine-doped potassium clusters by thermal ionization mass spectrometry" in Journal of Mass Spectrometry, 47, no. 11 (2012):1495-1499,
https://doi.org/10.1002/jms.3076 . .

TY  - JOUR
AU  - Veličković, Suzana
AU  - Veljković, Filip M.
AU  - Perić-Grujić, Aleksandra A.
AU  - Radak, Bojan
AU  - Veljković, Miomir V.
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4444
AB  - The electronic structure and properties of dipotassiummonohalides are important for understanding the unique physical and chemical behavior of MnX systems. In the present study, K2X (here X=F, Cl, Br, I) clusters were generated in the vapor over salts of the corresponding potassium halide, using a magnetic sector thermal ionization mass spectrometer. The ionization energies obtained for K2F, K2Cl, K2Br, and K2I molecules were 3.82 +/- 0.1eV, 3.68 +/- 0.1eV, 3.95 +/- 0.1eV, and 3.92 +/- 0.1, respectively. These experimental values of ionization energies for K2X (X=F, Br, and I) are presented for the first time. The ionization energy of K2Cl determined by thermal ionization corresponds to previous results obtained by photoionization mass spectrometry, and it agrees with the theoretical ionization energy calculated by the ab initio method. The presently obtained results support previous theoretical predictions that the excess electron in dipotassiummonohalide clusters is delocalized over two potassium atoms, which is characteristic for F-center clusters. Copyright (C) 2011 John Wiley and Sons, Ltd.
T2  - Rapid Communications in Mass Spectrometry
T1  - Ionization energies of K2X (X=F, Cl, Br, I) clusters
VL  - 25
IS  - 16
SP  - 2327
EP  - 2332
DO  - 10.1002/rcm.5128
ER  - 

@article{
author = "Veličković, Suzana and Veljković, Filip M. and Perić-Grujić, Aleksandra A. and Radak, Bojan and Veljković, Miomir V.",
year = "2011",
abstract = "The electronic structure and properties of dipotassiummonohalides are important for understanding the unique physical and chemical behavior of MnX systems. In the present study, K2X (here X=F, Cl, Br, I) clusters were generated in the vapor over salts of the corresponding potassium halide, using a magnetic sector thermal ionization mass spectrometer. The ionization energies obtained for K2F, K2Cl, K2Br, and K2I molecules were 3.82 +/- 0.1eV, 3.68 +/- 0.1eV, 3.95 +/- 0.1eV, and 3.92 +/- 0.1, respectively. These experimental values of ionization energies for K2X (X=F, Br, and I) are presented for the first time. The ionization energy of K2Cl determined by thermal ionization corresponds to previous results obtained by photoionization mass spectrometry, and it agrees with the theoretical ionization energy calculated by the ab initio method. The presently obtained results support previous theoretical predictions that the excess electron in dipotassiummonohalide clusters is delocalized over two potassium atoms, which is characteristic for F-center clusters. Copyright (C) 2011 John Wiley and Sons, Ltd.",
journal = "Rapid Communications in Mass Spectrometry",
title = "Ionization energies of K2X (X=F, Cl, Br, I) clusters",
volume = "25",
number = "16",
pages = "2327-2332",
doi = "10.1002/rcm.5128"
}

Veličković, S., Veljković, F. M., Perić-Grujić, A. A., Radak, B.,& Veljković, M. V.. (2011). Ionization energies of K2X (X=F, Cl, Br, I) clusters. in Rapid Communications in Mass Spectrometry, 25(16), 2327-2332.
https://doi.org/10.1002/rcm.5128

Veličković S, Veljković FM, Perić-Grujić AA, Radak B, Veljković MV. Ionization energies of K2X (X=F, Cl, Br, I) clusters. in Rapid Communications in Mass Spectrometry. 2011;25(16):2327-2332.
doi:10.1002/rcm.5128 .

Veličković, Suzana, Veljković, Filip M., Perić-Grujić, Aleksandra A., Radak, Bojan, Veljković, Miomir V., "Ionization energies of K2X (X=F, Cl, Br, I) clusters" in Rapid Communications in Mass Spectrometry, 25, no. 16 (2011):2327-2332,
https://doi.org/10.1002/rcm.5128 . .

TY  - JOUR
AU  - Smiljanić, Slavko N.
AU  - Smičiklas, Ivana D.
AU  - Perić-Grujić, Aleksandra A.
AU  - Šljivić-Ivanović, Marija Z.
AU  - Dukić, B.
AU  - Lončar, Boris B.
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4298
AB  - The waste red mud, remaining in remarkable quantities after the digestion of bauxite ores following the Bayer process, contains number of voluble minerals with excellent sorption properties towards aqueous heavy metals. Heating at 600 degrees C was found to be a favorable treatment for revalorization of rinsed red mud into an efficient Ni2+ sorbent (RBRM600). As potential practical application of RBRM600 for Ni2+ accumulation greatly depends on the solution composition and pH, the influence of these vital process variables was considered in this study. The initial pH rise from 2 to 3.5 caused the most evident increase in the amounts of Ni2+ removed: furthermore, the effect was more obvious for lower initial sorbate concentrations. Conversely, changes of the solution pH between 3.5 and 8 did not have a significant influence on the sorption. The increase of initial cation concentration caused the increase of the sorbed amount. following Langmuir isotherm model. The calculated maximum sorption capacity of 27.54 mg/g demonstrated capacity increase of approximately 20% in respect to inactivated rinsed red mud. Coexisting cations inhibited Ni2+ removal in the following order: Cu2+ GT Pb2+ GT = Zn2+ GT Cd2+ GT GT Ca2+, whereas the presence of Na+ and K+ did not affect the process. The investigated anions caused decrease of Ni2+ removal efficiency in the order: EDTA GT chromate GT acetate GT sulphate, however, fluoride slightly improved sorption. Low desorption of Ni2+ in various media showed that the heavy metal cations are tightly bound to RBRM600 surface, thus disposal or reuse of spent sorbent should be considered. (C) 2011 Elsevier B.V. All rights reserved.
T2  - Chemical Engineering Journal
T1  - Study of factors affecting Ni2+ immobilization efficiency by temperature activated red mud
VL  - 168
IS  - 2
SP  - 610
EP  - 619
DO  - 10.1016/j.cej.2011.01.034
ER  - 

@article{
author = "Smiljanić, Slavko N. and Smičiklas, Ivana D. and Perić-Grujić, Aleksandra A. and Šljivić-Ivanović, Marija Z. and Dukić, B. and Lončar, Boris B.",
year = "2011",
abstract = "The waste red mud, remaining in remarkable quantities after the digestion of bauxite ores following the Bayer process, contains number of voluble minerals with excellent sorption properties towards aqueous heavy metals. Heating at 600 degrees C was found to be a favorable treatment for revalorization of rinsed red mud into an efficient Ni2+ sorbent (RBRM600). As potential practical application of RBRM600 for Ni2+ accumulation greatly depends on the solution composition and pH, the influence of these vital process variables was considered in this study. The initial pH rise from 2 to 3.5 caused the most evident increase in the amounts of Ni2+ removed: furthermore, the effect was more obvious for lower initial sorbate concentrations. Conversely, changes of the solution pH between 3.5 and 8 did not have a significant influence on the sorption. The increase of initial cation concentration caused the increase of the sorbed amount. following Langmuir isotherm model. The calculated maximum sorption capacity of 27.54 mg/g demonstrated capacity increase of approximately 20% in respect to inactivated rinsed red mud. Coexisting cations inhibited Ni2+ removal in the following order: Cu2+ GT Pb2+ GT = Zn2+ GT Cd2+ GT GT Ca2+, whereas the presence of Na+ and K+ did not affect the process. The investigated anions caused decrease of Ni2+ removal efficiency in the order: EDTA GT chromate GT acetate GT sulphate, however, fluoride slightly improved sorption. Low desorption of Ni2+ in various media showed that the heavy metal cations are tightly bound to RBRM600 surface, thus disposal or reuse of spent sorbent should be considered. (C) 2011 Elsevier B.V. All rights reserved.",
journal = "Chemical Engineering Journal",
title = "Study of factors affecting Ni2+ immobilization efficiency by temperature activated red mud",
volume = "168",
number = "2",
pages = "610-619",
doi = "10.1016/j.cej.2011.01.034"
}

Smiljanić, S. N., Smičiklas, I. D., Perić-Grujić, A. A., Šljivić-Ivanović, M. Z., Dukić, B.,& Lončar, B. B.. (2011). Study of factors affecting Ni2+ immobilization efficiency by temperature activated red mud. in Chemical Engineering Journal, 168(2), 610-619.
https://doi.org/10.1016/j.cej.2011.01.034

Smiljanić SN, Smičiklas ID, Perić-Grujić AA, Šljivić-Ivanović MZ, Dukić B, Lončar BB. Study of factors affecting Ni2+ immobilization efficiency by temperature activated red mud. in Chemical Engineering Journal. 2011;168(2):610-619.
doi:10.1016/j.cej.2011.01.034 .

Smiljanić, Slavko N., Smičiklas, Ivana D., Perić-Grujić, Aleksandra A., Šljivić-Ivanović, Marija Z., Dukić, B., Lončar, Boris B., "Study of factors affecting Ni2+ immobilization efficiency by temperature activated red mud" in Chemical Engineering Journal, 168, no. 2 (2011):610-619,
https://doi.org/10.1016/j.cej.2011.01.034 . .

TY  - JOUR
AU  - Milosavljevic, Nedeljko B.
AU  - Ristić, Mirjana
AU  - Perić-Grujić, Aleksandra A.
AU  - Filipović, Jovanka M.
AU  - Štrbac, Svetlana
AU  - Rakočević, Zlatko Lj.
AU  - Kalagasidis Krušić, Melina
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4438
AB  - Novel pH-sensitive hydrogels based on chitosan, itaconic acid and methacrylic acid were applied as adsorbents for the removal of Zn(2+) ions from aqueous solution. In batch tests, the influence of solution pH, contact time, initial metal ion concentration and temperature was examined. The sorption was found pH dependent, pH 5.5 being the optimum value. The adsorption process was well described by the pseudosecond order kinetic. The hydrogels were characterized by spectral (Fourier transform infrared-FTIR) and structural (SEM/EDX and atomic force microscopy-AFM) analyses. The surface topography changes were observed by atomic force microscopy, while the changes in surface composition were detected using phase imaging AFM. The negative values of free energy and enthalpy indicated that the adsorption is spontaneous and exothermic one. The best fitting isotherms were Langmuir and Redlich-Peterson and it was found that both linear and nonlinear methods were appropriate for obtaining the isotherm parameters. However, the increase of temperature leads to higher adsorption capacity, since swelling degree increased with temperature. (C) 2011 Elsevier B.V. All rights reserved.
T2  - Journal of Hazardous Materials
T1  - Sorption of zinc by novel pH-sensitive hydrogels based on chitosan, itaconic acid and methacrylic acid
VL  - 192
IS  - 2
SP  - 846
EP  - 854
DO  - 10.1016/j.jhazmat.2011.05.093
ER  - 

@article{
author = "Milosavljevic, Nedeljko B. and Ristić, Mirjana and Perić-Grujić, Aleksandra A. and Filipović, Jovanka M. and Štrbac, Svetlana and Rakočević, Zlatko Lj. and Kalagasidis Krušić, Melina",
year = "2011",
abstract = "Novel pH-sensitive hydrogels based on chitosan, itaconic acid and methacrylic acid were applied as adsorbents for the removal of Zn(2+) ions from aqueous solution. In batch tests, the influence of solution pH, contact time, initial metal ion concentration and temperature was examined. The sorption was found pH dependent, pH 5.5 being the optimum value. The adsorption process was well described by the pseudosecond order kinetic. The hydrogels were characterized by spectral (Fourier transform infrared-FTIR) and structural (SEM/EDX and atomic force microscopy-AFM) analyses. The surface topography changes were observed by atomic force microscopy, while the changes in surface composition were detected using phase imaging AFM. The negative values of free energy and enthalpy indicated that the adsorption is spontaneous and exothermic one. The best fitting isotherms were Langmuir and Redlich-Peterson and it was found that both linear and nonlinear methods were appropriate for obtaining the isotherm parameters. However, the increase of temperature leads to higher adsorption capacity, since swelling degree increased with temperature. (C) 2011 Elsevier B.V. All rights reserved.",
journal = "Journal of Hazardous Materials",
title = "Sorption of zinc by novel pH-sensitive hydrogels based on chitosan, itaconic acid and methacrylic acid",
volume = "192",
number = "2",
pages = "846-854",
doi = "10.1016/j.jhazmat.2011.05.093"
}

Milosavljevic, N. B., Ristić, M., Perić-Grujić, A. A., Filipović, J. M., Štrbac, S., Rakočević, Z. Lj.,& Kalagasidis Krušić, M.. (2011). Sorption of zinc by novel pH-sensitive hydrogels based on chitosan, itaconic acid and methacrylic acid. in Journal of Hazardous Materials, 192(2), 846-854.
https://doi.org/10.1016/j.jhazmat.2011.05.093

Milosavljevic NB, Ristić M, Perić-Grujić AA, Filipović JM, Štrbac S, Rakočević ZL, Kalagasidis Krušić M. Sorption of zinc by novel pH-sensitive hydrogels based on chitosan, itaconic acid and methacrylic acid. in Journal of Hazardous Materials. 2011;192(2):846-854.
doi:10.1016/j.jhazmat.2011.05.093 .

Milosavljevic, Nedeljko B., Ristić, Mirjana, Perić-Grujić, Aleksandra A., Filipović, Jovanka M., Štrbac, Svetlana, Rakočević, Zlatko Lj., Kalagasidis Krušić, Melina, "Sorption of zinc by novel pH-sensitive hydrogels based on chitosan, itaconic acid and methacrylic acid" in Journal of Hazardous Materials, 192, no. 2 (2011):846-854,
https://doi.org/10.1016/j.jhazmat.2011.05.093 . .

TY  - JOUR
AU  - Milosavljevic, Nedeljko B.
AU  - Ristić, Mirjana
AU  - Perić-Grujić, Aleksandra A.
AU  - Filipović, Jovanka M.
AU  - Štrbac, Svetlana
AU  - Rakočević, Zlatko Lj.
AU  - Kalagasidis Krušić, Melina
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4533
AB  - A removal of Cu2+ ions from aqueous solutions onto hydrogels of chitosan. itaconic and methacrylic acid has been investigated using batch adsorption technique. The extent of adsorption was investigated as a function of pH, adsorbent dose, initial metal ion concentration, contact time and temperature. The FIR spectra showed that -NH2, -OH and -COOH groups are involved in the Cu2+ ions adsorption. The surface topography changes were observed by AFM, where the phase images indicated that sorption takes place on the surface of the hydrogel and in the bulk. Pseudo-first order, pseudo-second order and intraparticle diffusion models were analyzed and showed that the Cu2+ ions adsorption followed pseudo-second order kinetics. The equilibrium data were analyzed using Langmuir, Freundlich and Redlich-Peterson isotherms and the best interpretation was given by Redlich-Peterson. The adsorption capacity was found to be 122.59 mg/g, based on the non-linear Langmuir isotherm. Based on the separation factor. R-L, the Cu2+ ion adsorption is favorable, while the low activation energies indicate physisorption. Desorption experiments, done with a nitric acid, showed that the investigated hydrogels could be reused without significant losses of the initial properties even after three adsorption-sorption cycles. (C) 2011 Elsevier B.V. All rights reserved.
T2  - Colloids and Surfaces. A: Physicochemical and Engineering Aspects
T1  - Removal of Cu2+ ions using hydrogels of chitosan, itaconic and methacrylic acid: FTIR, SEM/EDX, AFM, kinetic and equilibrium study
VL  - 388
IS  - 1-3
SP  - 59
EP  - 69
DO  - 10.1016/j.colsurfa.2011.08.011
ER  - 

@article{
author = "Milosavljevic, Nedeljko B. and Ristić, Mirjana and Perić-Grujić, Aleksandra A. and Filipović, Jovanka M. and Štrbac, Svetlana and Rakočević, Zlatko Lj. and Kalagasidis Krušić, Melina",
year = "2011",
abstract = "A removal of Cu2+ ions from aqueous solutions onto hydrogels of chitosan. itaconic and methacrylic acid has been investigated using batch adsorption technique. The extent of adsorption was investigated as a function of pH, adsorbent dose, initial metal ion concentration, contact time and temperature. The FIR spectra showed that -NH2, -OH and -COOH groups are involved in the Cu2+ ions adsorption. The surface topography changes were observed by AFM, where the phase images indicated that sorption takes place on the surface of the hydrogel and in the bulk. Pseudo-first order, pseudo-second order and intraparticle diffusion models were analyzed and showed that the Cu2+ ions adsorption followed pseudo-second order kinetics. The equilibrium data were analyzed using Langmuir, Freundlich and Redlich-Peterson isotherms and the best interpretation was given by Redlich-Peterson. The adsorption capacity was found to be 122.59 mg/g, based on the non-linear Langmuir isotherm. Based on the separation factor. R-L, the Cu2+ ion adsorption is favorable, while the low activation energies indicate physisorption. Desorption experiments, done with a nitric acid, showed that the investigated hydrogels could be reused without significant losses of the initial properties even after three adsorption-sorption cycles. (C) 2011 Elsevier B.V. All rights reserved.",
journal = "Colloids and Surfaces. A: Physicochemical and Engineering Aspects",
title = "Removal of Cu2+ ions using hydrogels of chitosan, itaconic and methacrylic acid: FTIR, SEM/EDX, AFM, kinetic and equilibrium study",
volume = "388",
number = "1-3",
pages = "59-69",
doi = "10.1016/j.colsurfa.2011.08.011"
}

Milosavljevic, N. B., Ristić, M., Perić-Grujić, A. A., Filipović, J. M., Štrbac, S., Rakočević, Z. Lj.,& Kalagasidis Krušić, M.. (2011). Removal of Cu2+ ions using hydrogels of chitosan, itaconic and methacrylic acid: FTIR, SEM/EDX, AFM, kinetic and equilibrium study. in Colloids and Surfaces. A: Physicochemical and Engineering Aspects, 388(1-3), 59-69.
https://doi.org/10.1016/j.colsurfa.2011.08.011

Milosavljevic NB, Ristić M, Perić-Grujić AA, Filipović JM, Štrbac S, Rakočević ZL, Kalagasidis Krušić M. Removal of Cu2+ ions using hydrogels of chitosan, itaconic and methacrylic acid: FTIR, SEM/EDX, AFM, kinetic and equilibrium study. in Colloids and Surfaces. A: Physicochemical and Engineering Aspects. 2011;388(1-3):59-69.
doi:10.1016/j.colsurfa.2011.08.011 .

Milosavljevic, Nedeljko B., Ristić, Mirjana, Perić-Grujić, Aleksandra A., Filipović, Jovanka M., Štrbac, Svetlana, Rakočević, Zlatko Lj., Kalagasidis Krušić, Melina, "Removal of Cu2+ ions using hydrogels of chitosan, itaconic and methacrylic acid: FTIR, SEM/EDX, AFM, kinetic and equilibrium study" in Colloids and Surfaces. A: Physicochemical and Engineering Aspects, 388, no. 1-3 (2011):59-69,
https://doi.org/10.1016/j.colsurfa.2011.08.011 . .

TY  - JOUR
AU  - Smiljanić, Slavko N.
AU  - Smičiklas, Ivana D.
AU  - Perić-Grujić, Aleksandra A.
AU  - Lončar, Boris B.
AU  - Mitrić, Miodrag
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4076
AB  - Red mud, an abundant industrial waste from alumina industry, represents a rich source of various metal oxides, mainly of Fe2O3 Al2O3 and SiO2. In this study, the rinsed Bosnian red mud (RBRM) was evaluated as an economical, composite sorbent for aqueous Ni2+ ions. The process was investigated as a function of pH, contact time and initial metal concentration. The investigated mineral mixture exhibited a high acid neutralising capacity, and its most important role in cation immobilization was observed in the initial pH range 2-8. The initial metal ion concentration strongly influenced the sorption kinetics and equilibrium times. Addition of 5 g/L of RBRM caused 100% removal from the solutions of 10(-4) to 5 x 10(-4) mol/L, whereas with the further increase of Ni2+ concentration to 8 x 10(-3) mol/L, the removal efficiency decreased to 26%. The maximum sorption capacity of 0.372 mmol/g, at initial pH 5, was determined using Langmuir theoretical model. The possibility of sorption efficiency improvement by annealing RBRM powder was investigated in the range 200-900 degrees C and the relationships between temperature, red mud physicochemical and sorption properties were established. The optimum heating temperature was found to be 600 degrees C, due to water exclusion from gibbsite and bayerite phases, leading to improved porosity and surface area, as well as increased pH value and sorption efficiency. The stability of the sorbed cation was assessed by leaching experiments in distilled water and acidic TCLP2 solution. (C) 2010 Elsevier BM. All rights reserved.
T2  - Chemical Engineering Journal
T1  - Rinsed and thermally treated red mud sorbents for aqueous Ni2+ ions
VL  - 162
IS  - 1
SP  - 75
EP  - 83
DO  - 10.1016/j.cej.2010.04.062
ER  - 

@article{
author = "Smiljanić, Slavko N. and Smičiklas, Ivana D. and Perić-Grujić, Aleksandra A. and Lončar, Boris B. and Mitrić, Miodrag",
year = "2010",
abstract = "Red mud, an abundant industrial waste from alumina industry, represents a rich source of various metal oxides, mainly of Fe2O3 Al2O3 and SiO2. In this study, the rinsed Bosnian red mud (RBRM) was evaluated as an economical, composite sorbent for aqueous Ni2+ ions. The process was investigated as a function of pH, contact time and initial metal concentration. The investigated mineral mixture exhibited a high acid neutralising capacity, and its most important role in cation immobilization was observed in the initial pH range 2-8. The initial metal ion concentration strongly influenced the sorption kinetics and equilibrium times. Addition of 5 g/L of RBRM caused 100% removal from the solutions of 10(-4) to 5 x 10(-4) mol/L, whereas with the further increase of Ni2+ concentration to 8 x 10(-3) mol/L, the removal efficiency decreased to 26%. The maximum sorption capacity of 0.372 mmol/g, at initial pH 5, was determined using Langmuir theoretical model. The possibility of sorption efficiency improvement by annealing RBRM powder was investigated in the range 200-900 degrees C and the relationships between temperature, red mud physicochemical and sorption properties were established. The optimum heating temperature was found to be 600 degrees C, due to water exclusion from gibbsite and bayerite phases, leading to improved porosity and surface area, as well as increased pH value and sorption efficiency. The stability of the sorbed cation was assessed by leaching experiments in distilled water and acidic TCLP2 solution. (C) 2010 Elsevier BM. All rights reserved.",
journal = "Chemical Engineering Journal",
title = "Rinsed and thermally treated red mud sorbents for aqueous Ni2+ ions",
volume = "162",
number = "1",
pages = "75-83",
doi = "10.1016/j.cej.2010.04.062"
}

Smiljanić, S. N., Smičiklas, I. D., Perić-Grujić, A. A., Lončar, B. B.,& Mitrić, M.. (2010). Rinsed and thermally treated red mud sorbents for aqueous Ni2+ ions. in Chemical Engineering Journal, 162(1), 75-83.
https://doi.org/10.1016/j.cej.2010.04.062

Smiljanić SN, Smičiklas ID, Perić-Grujić AA, Lončar BB, Mitrić M. Rinsed and thermally treated red mud sorbents for aqueous Ni2+ ions. in Chemical Engineering Journal. 2010;162(1):75-83.
doi:10.1016/j.cej.2010.04.062 .

Smiljanić, Slavko N., Smičiklas, Ivana D., Perić-Grujić, Aleksandra A., Lončar, Boris B., Mitrić, Miodrag, "Rinsed and thermally treated red mud sorbents for aqueous Ni2+ ions" in Chemical Engineering Journal, 162, no. 1 (2010):75-83,
https://doi.org/10.1016/j.cej.2010.04.062 . .

TY  - JOUR
AU  - Milosavljevic, Nedeljko B.
AU  - Ristić, Mirjana
AU  - Perić-Grujić, Aleksandra A.
AU  - Filipović, Jovanka M.
AU  - Štrbac, Svetlana
AU  - Rakočević, Zlatko Lj.
AU  - Kalagasidis Krušić, Melina
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4173
AB  - A hydrogel has been synthesized by ionic crosslinking of chitosan (Ch) with itaconic acid (IA), followed by a free radical polymerization and crosslinking of Ch/IA network by adding methacrylic acid and the crosslinker. The resulting material (Ch/IA/MAA hydrogel) was characterized by spectral (Fourier transform infrared (FTIR)), thermal (thermogravimetric analysis (TGA)) and structural (SEM/EDX and atomic force microscopy (AFM)) analyses. The prepared hydrogel was investigated as potential adsorbent for removal of Cd2+ ions from aqueous solution. The effect of various physico-chemical parameters such as pH, adsorbent dosage, adsorbate concentration and contact time was studied in batch experiments. The results of spectral analyses of Cd-loaded hydrogel have shown that active functional groups are -NH2, -OH and -COOH. SEM/EDX analysis and AFM surface topography and phase images indicated that apart from the adsorption on the surface of the hydrogel, sorption takes place in the bulk, as well. The experimental kinetic and equilibrium data were better fitted by pseudo-second order kinetic model and Langmuir adsorption isotherm. The parameters obtained in thermodynamic studies showed that the adsorption of Cd2+ on Ch/IA/MAA hydrogel was spontaneous and exothermic in nature. Desorption studies were carried out using acid leaching (HNO3) and it has been shown that the regenerated hydrogel can be reused three times without any loss of adsorption capacity. The maximum adsorption of 285.7 mg/g has been obtained at pH 5.5 and the results of adsorption/desorption experiments implies that the Ch/IA/MAA hydrogel may be used as efficient sorbent for removal of Cd2+ ions from aqueous solution. (C) 2010 Elsevier B.V. All rights reserved.
T2  - Chemical Engineering Journal
T1  - Hydrogel based on chitosan, itaconic acid and methacrylic acid as adsorbent of Cd2+ ions from aqueous solution
VL  - 165
IS  - 2
SP  - 554
EP  - 562
DO  - 10.1016/j.cej.2010.09.072
ER  - 

@article{
author = "Milosavljevic, Nedeljko B. and Ristić, Mirjana and Perić-Grujić, Aleksandra A. and Filipović, Jovanka M. and Štrbac, Svetlana and Rakočević, Zlatko Lj. and Kalagasidis Krušić, Melina",
year = "2010",
abstract = "A hydrogel has been synthesized by ionic crosslinking of chitosan (Ch) with itaconic acid (IA), followed by a free radical polymerization and crosslinking of Ch/IA network by adding methacrylic acid and the crosslinker. The resulting material (Ch/IA/MAA hydrogel) was characterized by spectral (Fourier transform infrared (FTIR)), thermal (thermogravimetric analysis (TGA)) and structural (SEM/EDX and atomic force microscopy (AFM)) analyses. The prepared hydrogel was investigated as potential adsorbent for removal of Cd2+ ions from aqueous solution. The effect of various physico-chemical parameters such as pH, adsorbent dosage, adsorbate concentration and contact time was studied in batch experiments. The results of spectral analyses of Cd-loaded hydrogel have shown that active functional groups are -NH2, -OH and -COOH. SEM/EDX analysis and AFM surface topography and phase images indicated that apart from the adsorption on the surface of the hydrogel, sorption takes place in the bulk, as well. The experimental kinetic and equilibrium data were better fitted by pseudo-second order kinetic model and Langmuir adsorption isotherm. The parameters obtained in thermodynamic studies showed that the adsorption of Cd2+ on Ch/IA/MAA hydrogel was spontaneous and exothermic in nature. Desorption studies were carried out using acid leaching (HNO3) and it has been shown that the regenerated hydrogel can be reused three times without any loss of adsorption capacity. The maximum adsorption of 285.7 mg/g has been obtained at pH 5.5 and the results of adsorption/desorption experiments implies that the Ch/IA/MAA hydrogel may be used as efficient sorbent for removal of Cd2+ ions from aqueous solution. (C) 2010 Elsevier B.V. All rights reserved.",
journal = "Chemical Engineering Journal",
title = "Hydrogel based on chitosan, itaconic acid and methacrylic acid as adsorbent of Cd2+ ions from aqueous solution",
volume = "165",
number = "2",
pages = "554-562",
doi = "10.1016/j.cej.2010.09.072"
}

Milosavljevic, N. B., Ristić, M., Perić-Grujić, A. A., Filipović, J. M., Štrbac, S., Rakočević, Z. Lj.,& Kalagasidis Krušić, M.. (2010). Hydrogel based on chitosan, itaconic acid and methacrylic acid as adsorbent of Cd2+ ions from aqueous solution. in Chemical Engineering Journal, 165(2), 554-562.
https://doi.org/10.1016/j.cej.2010.09.072

Milosavljevic NB, Ristić M, Perić-Grujić AA, Filipović JM, Štrbac S, Rakočević ZL, Kalagasidis Krušić M. Hydrogel based on chitosan, itaconic acid and methacrylic acid as adsorbent of Cd2+ ions from aqueous solution. in Chemical Engineering Journal. 2010;165(2):554-562.
doi:10.1016/j.cej.2010.09.072 .

Milosavljevic, Nedeljko B., Ristić, Mirjana, Perić-Grujić, Aleksandra A., Filipović, Jovanka M., Štrbac, Svetlana, Rakočević, Zlatko Lj., Kalagasidis Krušić, Melina, "Hydrogel based on chitosan, itaconic acid and methacrylic acid as adsorbent of Cd2+ ions from aqueous solution" in Chemical Engineering Journal, 165, no. 2 (2010):554-562,
https://doi.org/10.1016/j.cej.2010.09.072 . .

TY  - JOUR
AU  - Cvetićanin, Jelena M.
AU  - Veličković, Suzana
AU  - Đorđević, Vesna R.
AU  - Đustebek, Jasmina B.
AU  - Veljković, Miomir V.
AU  - Perić-Grujić, Aleksandra A.
AU  - Nešković, Olivera M.
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3472
AB  - Using the ion implantation technique (introducing negatively charged fullerene into a low temperature lithium plasma column by a strong axial magnetic field) endohedral fullerenes Li"C-70, Li-2"C-70 and Li-3"C-70 were produced. Mass spectral studies (both TIMS-thermal ionization mass spectrometry and MALDI TOF MS - matrix assisted laser desorption ionization time-of-flight mass spectrometry) of these endohedral fullerenes provided detailed structural and reactivity information about these unusual species. The fragmentation of the obtained ions is shown to be by a multiple C-2 loss (shrink-wrap mechanism). According to the fact that more atoms in the fullerene make the produced endohedral less stable, Li-3"C-70 shows a big degree of instability. The presence of Li-3"C-70 was observed on MALDI TOF MS.
T2  - Journal of Optoelectronics and Advanced Materials
T1  - TIMS and MALDI TOF of endohedral Li-n"C-70 (n=1-3) metallofullerenes
VL  - 10
IS  - 6
SP  - 1505
EP  - 1507
UR  - https://hdl.handle.net/21.15107/rcub_vinar_3472
ER  - 

@article{
author = "Cvetićanin, Jelena M. and Veličković, Suzana and Đorđević, Vesna R. and Đustebek, Jasmina B. and Veljković, Miomir V. and Perić-Grujić, Aleksandra A. and Nešković, Olivera M.",
year = "2008",
abstract = "Using the ion implantation technique (introducing negatively charged fullerene into a low temperature lithium plasma column by a strong axial magnetic field) endohedral fullerenes Li"C-70, Li-2"C-70 and Li-3"C-70 were produced. Mass spectral studies (both TIMS-thermal ionization mass spectrometry and MALDI TOF MS - matrix assisted laser desorption ionization time-of-flight mass spectrometry) of these endohedral fullerenes provided detailed structural and reactivity information about these unusual species. The fragmentation of the obtained ions is shown to be by a multiple C-2 loss (shrink-wrap mechanism). According to the fact that more atoms in the fullerene make the produced endohedral less stable, Li-3"C-70 shows a big degree of instability. The presence of Li-3"C-70 was observed on MALDI TOF MS.",
journal = "Journal of Optoelectronics and Advanced Materials",
title = "TIMS and MALDI TOF of endohedral Li-n"C-70 (n=1-3) metallofullerenes",
volume = "10",
number = "6",
pages = "1505-1507",
url = "https://hdl.handle.net/21.15107/rcub_vinar_3472"
}

Cvetićanin, J. M., Veličković, S., Đorđević, V. R., Đustebek, J. B., Veljković, M. V., Perić-Grujić, A. A.,& Nešković, O. M.. (2008). TIMS and MALDI TOF of endohedral Li-n"C-70 (n=1-3) metallofullerenes. in Journal of Optoelectronics and Advanced Materials, 10(6), 1505-1507.
https://hdl.handle.net/21.15107/rcub_vinar_3472

Cvetićanin JM, Veličković S, Đorđević VR, Đustebek JB, Veljković MV, Perić-Grujić AA, Nešković OM. TIMS and MALDI TOF of endohedral Li-n"C-70 (n=1-3) metallofullerenes. in Journal of Optoelectronics and Advanced Materials. 2008;10(6):1505-1507.
https://hdl.handle.net/21.15107/rcub_vinar_3472 .

Cvetićanin, Jelena M., Veličković, Suzana, Đorđević, Vesna R., Đustebek, Jasmina B., Veljković, Miomir V., Perić-Grujić, Aleksandra A., Nešković, Olivera M., "TIMS and MALDI TOF of endohedral Li-n"C-70 (n=1-3) metallofullerenes" in Journal of Optoelectronics and Advanced Materials, 10, no. 6 (2008):1505-1507,
https://hdl.handle.net/21.15107/rcub_vinar_3472 .

TY  - JOUR
AU  - Perić-Grujić, Aleksandra A.
AU  - Nešković, Olivera M.
AU  - Veljković, Miomir V.
AU  - Laušević, Zoran
AU  - Laušević, Mila D.
PY  - 2007
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3349
AB  - In this work, the influence of silver and palladium on the surface of undoped, boron doped and phosphorus doped glassy carbon has been studied. The silver and palladium concentrations in solution, after metal deposition, were measured by atomic absorption spectrophotometer. The morphology of metal coatings was characterized by scanning electron microscopy. In order to investigate the nature and thermal stability of surface oxygen groups, temperature-programmed desorption method combined with mass spectrometric analyses, was performed. The results obtained have shown that silver and palladium spontaneously deposit from their salt solutions at the surface of glassy carbon samples. Silver deposits have dendrite structure, whilst palladium forms separate clusters. The highest amount of both silver and palladium deposits at the surface of sample containing the highest quantity of surface oxide complexes. It has been concluded that carboxyl groups and structure defects are responsible for metal reduction. Calculated desorption energies have shown that the surface modification by metal deposition leads to the formation of more stable surface of undoped and doped glassy carbon samples.
T2  - Bulletin of Materials Science
T1  - Surface characterization of silver and palladium modified glassy carbon
VL  - 30
IS  - 6
SP  - 587
EP  - 593
DO  - 10.1007/s12034-007-0093-7
ER  - 

@article{
author = "Perić-Grujić, Aleksandra A. and Nešković, Olivera M. and Veljković, Miomir V. and Laušević, Zoran and Laušević, Mila D.",
year = "2007",
abstract = "In this work, the influence of silver and palladium on the surface of undoped, boron doped and phosphorus doped glassy carbon has been studied. The silver and palladium concentrations in solution, after metal deposition, were measured by atomic absorption spectrophotometer. The morphology of metal coatings was characterized by scanning electron microscopy. In order to investigate the nature and thermal stability of surface oxygen groups, temperature-programmed desorption method combined with mass spectrometric analyses, was performed. The results obtained have shown that silver and palladium spontaneously deposit from their salt solutions at the surface of glassy carbon samples. Silver deposits have dendrite structure, whilst palladium forms separate clusters. The highest amount of both silver and palladium deposits at the surface of sample containing the highest quantity of surface oxide complexes. It has been concluded that carboxyl groups and structure defects are responsible for metal reduction. Calculated desorption energies have shown that the surface modification by metal deposition leads to the formation of more stable surface of undoped and doped glassy carbon samples.",
journal = "Bulletin of Materials Science",
title = "Surface characterization of silver and palladium modified glassy carbon",
volume = "30",
number = "6",
pages = "587-593",
doi = "10.1007/s12034-007-0093-7"
}

Perić-Grujić, A. A., Nešković, O. M., Veljković, M. V., Laušević, Z.,& Laušević, M. D.. (2007). Surface characterization of silver and palladium modified glassy carbon. in Bulletin of Materials Science, 30(6), 587-593.
https://doi.org/10.1007/s12034-007-0093-7

Perić-Grujić AA, Nešković OM, Veljković MV, Laušević Z, Laušević MD. Surface characterization of silver and palladium modified glassy carbon. in Bulletin of Materials Science. 2007;30(6):587-593.
doi:10.1007/s12034-007-0093-7 .

Perić-Grujić, Aleksandra A., Nešković, Olivera M., Veljković, Miomir V., Laušević, Zoran, Laušević, Mila D., "Surface characterization of silver and palladium modified glassy carbon" in Bulletin of Materials Science, 30, no. 6 (2007):587-593,
https://doi.org/10.1007/s12034-007-0093-7 . .

TY  - JOUR
AU  - Perić-Grujić, Aleksandra A.
AU  - Vasiljevic, Tatjana M.
AU  - Nešković, Olivera M.
AU  - Veljković, Miomir V.
AU  - Laušević, Zoran
AU  - Laugevic, Mila D.
PY  - 2006
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3116
AB  - The effects of boron and phosphorus incorporation in phenolic resin precursor to the oxidation resistance of glassy carbon have been studied. In order to reveal the nature and composition of the oxygen complexes formed at the surface of doped glassy carbon, under controlled atmosphere, the surface of the samples was cleaned under vacuum up to 1273 K. Specific functional groups, subsequently formed under dry CO2 or O-2 atmosphere on the surface of boron-doped and phosphorus-doped glassy carbon samples, were examined using the temperature-programmed desorption method combined with mass spectrometric analysis. Characterization of surface properties of undoped and doped samples has shown that in the presence of either boron or phosphorus heteroatoms, a lower amount of oxygen complexes formed after CO2 exposure, while, typically, higher amount of oxygen complexes formed after O-2 exposure. It has been concluded that the surface of undoped glassy carbon has a greater affinity towards CO2, while in the presence of either boron or phosphorus heteroatoms, the glassy carbon surface affinity becomes greater towards O-2, under experimental conditions.
T2  - Bulletin of Materials Science
T1  - Formation of oxygen complexes in controlled atmosphere at surface of doped glassy carbon
VL  - 29
IS  - 5
SP  - 467
EP  - 473
DO  - 10.1007/BF02914077
ER  - 

@article{
author = "Perić-Grujić, Aleksandra A. and Vasiljevic, Tatjana M. and Nešković, Olivera M. and Veljković, Miomir V. and Laušević, Zoran and Laugevic, Mila D.",
year = "2006",
abstract = "The effects of boron and phosphorus incorporation in phenolic resin precursor to the oxidation resistance of glassy carbon have been studied. In order to reveal the nature and composition of the oxygen complexes formed at the surface of doped glassy carbon, under controlled atmosphere, the surface of the samples was cleaned under vacuum up to 1273 K. Specific functional groups, subsequently formed under dry CO2 or O-2 atmosphere on the surface of boron-doped and phosphorus-doped glassy carbon samples, were examined using the temperature-programmed desorption method combined with mass spectrometric analysis. Characterization of surface properties of undoped and doped samples has shown that in the presence of either boron or phosphorus heteroatoms, a lower amount of oxygen complexes formed after CO2 exposure, while, typically, higher amount of oxygen complexes formed after O-2 exposure. It has been concluded that the surface of undoped glassy carbon has a greater affinity towards CO2, while in the presence of either boron or phosphorus heteroatoms, the glassy carbon surface affinity becomes greater towards O-2, under experimental conditions.",
journal = "Bulletin of Materials Science",
title = "Formation of oxygen complexes in controlled atmosphere at surface of doped glassy carbon",
volume = "29",
number = "5",
pages = "467-473",
doi = "10.1007/BF02914077"
}

Perić-Grujić, A. A., Vasiljevic, T. M., Nešković, O. M., Veljković, M. V., Laušević, Z.,& Laugevic, M. D.. (2006). Formation of oxygen complexes in controlled atmosphere at surface of doped glassy carbon. in Bulletin of Materials Science, 29(5), 467-473.
https://doi.org/10.1007/BF02914077

Perić-Grujić AA, Vasiljevic TM, Nešković OM, Veljković MV, Laušević Z, Laugevic MD. Formation of oxygen complexes in controlled atmosphere at surface of doped glassy carbon. in Bulletin of Materials Science. 2006;29(5):467-473.
doi:10.1007/BF02914077 .

Perić-Grujić, Aleksandra A., Vasiljevic, Tatjana M., Nešković, Olivera M., Veljković, Miomir V., Laušević, Zoran, Laugevic, Mila D., "Formation of oxygen complexes in controlled atmosphere at surface of doped glassy carbon" in Bulletin of Materials Science, 29, no. 5 (2006):467-473,
https://doi.org/10.1007/BF02914077 . .