TY  - JOUR
AU  - Lučić, Milica
AU  - Potkonjak, Nebojša
AU  - Sredović Ignjatović, Ivana
AU  - Lević, Steva
AU  - Dajić-Stevanović, Zora
AU  - Kolašinac, Stefan
AU  - Belović, Miona
AU  - Torbica, Aleksandra
AU  - Zlatanović, Ivan
AU  - Pavlović, Vladimir
AU  - Onjia, Antonije
PY  - 2023
UR  - https://www.mdpi.com/2304-8158/12/13/2468
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6397
AB  - This study investigates the effects of ultrasound, in combination with chemical pretreatments, on the quality attributes (total phenolic and carotenoid content, antioxidant activity (2,2-Diphenyl-1-picrylhydrazyl assay (DPPH)), ferric-reducing ability (FRAP), CIE L* a* b* color, non-enzymatic browning, rehydration ratio, textural and morphological properties) of red pepper subjected to drying (hot air drying or freeze drying). The fractional factorial design was used to assess the impact of factors. The global Derringer desirability function was used to determine the optimal conditions for the best quality attributes of dried pepper. The drying method influenced total phenolic content, a* (redness), and initial rehydration ratio; pretreatment time significantly affected FRAP antiradical activity, a*, chroma and non-browning index, while pH-value had a significant effect on the texture of dried pepper. Non-enzymatic browning was reduced to 72.6%, while the DPPH antioxidant capacity of freeze-dried peppers was enhanced from 4.2% to 71.9%. Ultrasonic pretreatment led to changes in the pepper morphology, while potassium metabisulfite (KMS) was a more effective additive than citric acid.
T2  - Foods
T2  - Foods
T1  - Influence of Ultrasonic and Chemical Pretreatments on Quality Attributes of Dried Pepper (Capsicum annuum)
IS  - 13
SP  - 2468
VL  - 12
DO  - 10.3390/foods12132468
ER  - 

@article{
author = "Lučić, Milica and Potkonjak, Nebojša and Sredović Ignjatović, Ivana and Lević, Steva and Dajić-Stevanović, Zora and Kolašinac, Stefan and Belović, Miona and Torbica, Aleksandra and Zlatanović, Ivan and Pavlović, Vladimir and Onjia, Antonije",
year = "2023",
abstract = "This study investigates the effects of ultrasound, in combination with chemical pretreatments, on the quality attributes (total phenolic and carotenoid content, antioxidant activity (2,2-Diphenyl-1-picrylhydrazyl assay (DPPH)), ferric-reducing ability (FRAP), CIE L* a* b* color, non-enzymatic browning, rehydration ratio, textural and morphological properties) of red pepper subjected to drying (hot air drying or freeze drying). The fractional factorial design was used to assess the impact of factors. The global Derringer desirability function was used to determine the optimal conditions for the best quality attributes of dried pepper. The drying method influenced total phenolic content, a* (redness), and initial rehydration ratio; pretreatment time significantly affected FRAP antiradical activity, a*, chroma and non-browning index, while pH-value had a significant effect on the texture of dried pepper. Non-enzymatic browning was reduced to 72.6%, while the DPPH antioxidant capacity of freeze-dried peppers was enhanced from 4.2% to 71.9%. Ultrasonic pretreatment led to changes in the pepper morphology, while potassium metabisulfite (KMS) was a more effective additive than citric acid.",
journal = "Foods, Foods",
title = "Influence of Ultrasonic and Chemical Pretreatments on Quality Attributes of Dried Pepper (Capsicum annuum)",
number = "13",
pages = "2468",
volume = "12",
doi = "10.3390/foods12132468"
}

Lučić, M., Potkonjak, N., Sredović Ignjatović, I., Lević, S., Dajić-Stevanović, Z., Kolašinac, S., Belović, M., Torbica, A., Zlatanović, I., Pavlović, V.,& Onjia, A.. (2023). Influence of Ultrasonic and Chemical Pretreatments on Quality Attributes of Dried Pepper (Capsicum annuum). in Foods, 12(13), 2468.
https://doi.org/10.3390/foods12132468

Lučić M, Potkonjak N, Sredović Ignjatović I, Lević S, Dajić-Stevanović Z, Kolašinac S, Belović M, Torbica A, Zlatanović I, Pavlović V, Onjia A. Influence of Ultrasonic and Chemical Pretreatments on Quality Attributes of Dried Pepper (Capsicum annuum). in Foods. 2023;12(13):2468.
doi:10.3390/foods12132468 .

Lučić, Milica, Potkonjak, Nebojša, Sredović Ignjatović, Ivana, Lević, Steva, Dajić-Stevanović, Zora, Kolašinac, Stefan, Belović, Miona, Torbica, Aleksandra, Zlatanović, Ivan, Pavlović, Vladimir, Onjia, Antonije, "Influence of Ultrasonic and Chemical Pretreatments on Quality Attributes of Dried Pepper (Capsicum annuum)" in Foods, 12, no. 13 (2023):2468,
https://doi.org/10.3390/foods12132468 . .

TY  - JOUR
AU  - Dragović, Sneˇzana
AU  - Smičiklas, Ivana
AU  - Jović, Mihajlo
AU  - Čupić, Aleksandar
AU  - Dragović, Ranko
AU  - Gajić, Boško
AU  - Onjia, Antonije
PY  - 2023
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6349
AB  - Despite presenting a practical approach for the characterization of the environmental risk of potentially toxic elements (PTEs) derived from steel production facilities, the analysis of the spatial distribution of bioavailable PTEs concentrations in the soil is frequently overlooked in the management of polluted sites. In this study, the diethylenetriaminepentaacetic acid (DTPA)-extractable forms of PTEs were investigated in soils surrounding the largest Serbian steel production plant. The correlation and geostatistical analysis indicated their pronounced variability suggesting the anthropogenic origin of most investigated elements, apparently from the steel production facility. The detailed visualization of variables and observations derived by self-organizing maps (SOMs) revealed the homologies in PTEs’ distribution patterns, implying the common origin of some elements. These observations were confirmed by principal component analysis (PCA) and positive matrix factorization (PMF). The аpplied approach supports a comprehensive assessment of contaminated sites' ecological and health risks and provides a basis for soil remediation. © 2023 The Authors
T2  - Heliyon
T2  - Heliyon
T1  - Spatial distribution and source apportionment of DTPA-extractable metals in soils surrounding the largest Serbian steel production plant
IS  - 5
VL  - 9
DO  - 10.1016/j.heliyon.2023.e16307
ER  - 

@article{
author = "Dragović, Sneˇzana and Smičiklas, Ivana and Jović, Mihajlo and Čupić, Aleksandar and Dragović, Ranko and Gajić, Boško and Onjia, Antonije",
year = "2023",
abstract = "Despite presenting a practical approach for the characterization of the environmental risk of potentially toxic elements (PTEs) derived from steel production facilities, the analysis of the spatial distribution of bioavailable PTEs concentrations in the soil is frequently overlooked in the management of polluted sites. In this study, the diethylenetriaminepentaacetic acid (DTPA)-extractable forms of PTEs were investigated in soils surrounding the largest Serbian steel production plant. The correlation and geostatistical analysis indicated their pronounced variability suggesting the anthropogenic origin of most investigated elements, apparently from the steel production facility. The detailed visualization of variables and observations derived by self-organizing maps (SOMs) revealed the homologies in PTEs’ distribution patterns, implying the common origin of some elements. These observations were confirmed by principal component analysis (PCA) and positive matrix factorization (PMF). The аpplied approach supports a comprehensive assessment of contaminated sites' ecological and health risks and provides a basis for soil remediation. © 2023 The Authors",
journal = "Heliyon, Heliyon",
title = "Spatial distribution and source apportionment of DTPA-extractable metals in soils surrounding the largest Serbian steel production plant",
number = "5",
volume = "9",
doi = "10.1016/j.heliyon.2023.e16307"
}

Dragović, S., Smičiklas, I., Jović, M., Čupić, A., Dragović, R., Gajić, B.,& Onjia, A.. (2023). Spatial distribution and source apportionment of DTPA-extractable metals in soils surrounding the largest Serbian steel production plant. in Heliyon, 9(5).
https://doi.org/10.1016/j.heliyon.2023.e16307

Dragović S, Smičiklas I, Jović M, Čupić A, Dragović R, Gajić B, Onjia A. Spatial distribution and source apportionment of DTPA-extractable metals in soils surrounding the largest Serbian steel production plant. in Heliyon. 2023;9(5).
doi:10.1016/j.heliyon.2023.e16307 .

Dragović, Sneˇzana, Smičiklas, Ivana, Jović, Mihajlo, Čupić, Aleksandar, Dragović, Ranko, Gajić, Boško, Onjia, Antonije, "Spatial distribution and source apportionment of DTPA-extractable metals in soils surrounding the largest Serbian steel production plant" in Heliyon, 9, no. 5 (2023),
https://doi.org/10.1016/j.heliyon.2023.e16307 . .

TY  - JOUR
AU  - Lučić, Milica
AU  - Sredović Ignjatović, Ivana
AU  - Lević, Steva
AU  - Pećinar, Ilinka
AU  - Antić, Mališa
AU  - Đurđić, Slađana
AU  - Onjia, Antonije
PY  - 2022
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6042
AB  - The influence of extraction parameters on the ultrasonically assisted extraction (UAE) of K, Na, Ca, Mg, Zn, Cu, Fe, Mn, Cr, Se, Mo, Li, Al, B, Pb, Hg, Cd, As, and Ni was studied to determine the conditions when a minimum of essential and maximum of toxic elements is leached from peppers, depending on its ripening stage. The effect of process variables was investigated by using Box–Behnken design. Each essential element had a different optimal condition for minimal leaching, while the toxic elements were predominantly extracted with acetic acid solution as extractant. The highest correlation between extraction conditions and concentration of extracted elements was found for aqueous extracts of mature green pepper. The concentration of acetic acid highly influenced the leaching of elements and a strong correlation between the concentration of Al, B, Fe, and Mn, and the UAE experimental conditions were observed. Practical applications: This study investigates the leaching of minerals and heavy metals present in vegetables to the most commonly used media (water and acetic acid) during processing and canning. The data from this study may be useful for improving the quality of processed pepper products due to new information on how different parameters influence these losses (ripening stage of peppers, medium/solvent used for preparation, or storage, applied temperatures, time, mass to volume ratio). Essential elements are better preserved during the processing of intermediate breaker and mature red pepper compared to green mature fruits. Better retention of essential elements in the breaker and mature red pepper (that are mostly used in industrial processing) can be achieved by reducing the contact time with water, as well as mass to volume ratio. Leaching of toxic elements Al, Hg, and As can be improved with an acetic acid solution.
PB  - John Wiley and Sons Inc
T2  - Journal of Food Processing and Preservation
T1  - Ultrasound-assisted extraction of essential and toxic elements from pepper in different ripening stages using Box–Behnken design
DO  - 10.1111/jfpp.16493
ER  - 

@article{
author = "Lučić, Milica and Sredović Ignjatović, Ivana and Lević, Steva and Pećinar, Ilinka and Antić, Mališa and Đurđić, Slađana and Onjia, Antonije",
year = "2022",
abstract = "The influence of extraction parameters on the ultrasonically assisted extraction (UAE) of K, Na, Ca, Mg, Zn, Cu, Fe, Mn, Cr, Se, Mo, Li, Al, B, Pb, Hg, Cd, As, and Ni was studied to determine the conditions when a minimum of essential and maximum of toxic elements is leached from peppers, depending on its ripening stage. The effect of process variables was investigated by using Box–Behnken design. Each essential element had a different optimal condition for minimal leaching, while the toxic elements were predominantly extracted with acetic acid solution as extractant. The highest correlation between extraction conditions and concentration of extracted elements was found for aqueous extracts of mature green pepper. The concentration of acetic acid highly influenced the leaching of elements and a strong correlation between the concentration of Al, B, Fe, and Mn, and the UAE experimental conditions were observed. Practical applications: This study investigates the leaching of minerals and heavy metals present in vegetables to the most commonly used media (water and acetic acid) during processing and canning. The data from this study may be useful for improving the quality of processed pepper products due to new information on how different parameters influence these losses (ripening stage of peppers, medium/solvent used for preparation, or storage, applied temperatures, time, mass to volume ratio). Essential elements are better preserved during the processing of intermediate breaker and mature red pepper compared to green mature fruits. Better retention of essential elements in the breaker and mature red pepper (that are mostly used in industrial processing) can be achieved by reducing the contact time with water, as well as mass to volume ratio. Leaching of toxic elements Al, Hg, and As can be improved with an acetic acid solution.",
publisher = "John Wiley and Sons Inc",
journal = "Journal of Food Processing and Preservation",
title = "Ultrasound-assisted extraction of essential and toxic elements from pepper in different ripening stages using Box–Behnken design",
doi = "10.1111/jfpp.16493"
}

Lučić, M., Sredović Ignjatović, I., Lević, S., Pećinar, I., Antić, M., Đurđić, S.,& Onjia, A.. (2022). Ultrasound-assisted extraction of essential and toxic elements from pepper in different ripening stages using Box–Behnken design. in Journal of Food Processing and Preservation
John Wiley and Sons Inc..
https://doi.org/10.1111/jfpp.16493

Lučić M, Sredović Ignjatović I, Lević S, Pećinar I, Antić M, Đurđić S, Onjia A. Ultrasound-assisted extraction of essential and toxic elements from pepper in different ripening stages using Box–Behnken design. in Journal of Food Processing and Preservation. 2022;.
doi:10.1111/jfpp.16493 .

Lučić, Milica, Sredović Ignjatović, Ivana, Lević, Steva, Pećinar, Ilinka, Antić, Mališa, Đurđić, Slađana, Onjia, Antonije, "Ultrasound-assisted extraction of essential and toxic elements from pepper in different ripening stages using Box–Behnken design" in Journal of Food Processing and Preservation (2022),
https://doi.org/10.1111/jfpp.16493 . .

TY  - JOUR
AU  - Marković, Bojana M.
AU  - Stefanović, Ivan S.
AU  - Nastasović, Aleksandra B.
AU  - Sandić, Zvjezdana P.
AU  - Suručić, Ljiljana T.
AU  - Dapčević, Aleksandra
AU  - Džunuzović, Jasna V.
AU  - Jagličić, Zvonko
AU  - Vuković, Zorica M.
AU  - Pavlović, Vladimir
AU  - Onjia, Antonije E.
PY  - 2022
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/6019
AB  - A novel magnetic polymer/bentonite composite was prepared by suspension copolymerization of glycidyl methacrylate and ethylene glycol dimethacrylate in the presence of magnetic bentonite (MB-PGME) and functionalized with ethylene diamine and hexamethylene diamine (MB-PGME-ED and MB-PGME-HD). The obtained samples were characterized in terms of structure as well as thermal, magnetic and morphological properties. The sorption of rhenium (Re) and tungsten (W) from aqueous solution onto MB-PGME-ED and MB-PGME-HD was investigated considering their contact time and different initial ion concentration, giving possibility for usage of these composites as commercial sorbents. The sorption system follows the pseudo-second order and intraparticle diffusion kinetic models. The results indicated a better fit with the Freundlich isotherm model.
PB  - International Institute for the Science of Sintering (IISS)
T2  - Science of Sintering
T1  - Novel Magnetic Polymer/bentonite Composite: Characterization and Application for Re(VII) and W(VI) Adsorption
EP  - 428
IS  - 4
SP  - 419
VL  - 53
DO  - 10.2298/SOS2104419M
ER  - 

@article{
author = "Marković, Bojana M. and Stefanović, Ivan S. and Nastasović, Aleksandra B. and Sandić, Zvjezdana P. and Suručić, Ljiljana T. and Dapčević, Aleksandra and Džunuzović, Jasna V. and Jagličić, Zvonko and Vuković, Zorica M. and Pavlović, Vladimir and Onjia, Antonije E.",
year = "2022",
abstract = "A novel magnetic polymer/bentonite composite was prepared by suspension copolymerization of glycidyl methacrylate and ethylene glycol dimethacrylate in the presence of magnetic bentonite (MB-PGME) and functionalized with ethylene diamine and hexamethylene diamine (MB-PGME-ED and MB-PGME-HD). The obtained samples were characterized in terms of structure as well as thermal, magnetic and morphological properties. The sorption of rhenium (Re) and tungsten (W) from aqueous solution onto MB-PGME-ED and MB-PGME-HD was investigated considering their contact time and different initial ion concentration, giving possibility for usage of these composites as commercial sorbents. The sorption system follows the pseudo-second order and intraparticle diffusion kinetic models. The results indicated a better fit with the Freundlich isotherm model.",
publisher = "International Institute for the Science of Sintering (IISS)",
journal = "Science of Sintering",
title = "Novel Magnetic Polymer/bentonite Composite: Characterization and Application for Re(VII) and W(VI) Adsorption",
pages = "428-419",
number = "4",
volume = "53",
doi = "10.2298/SOS2104419M"
}

Marković, B. M., Stefanović, I. S., Nastasović, A. B., Sandić, Z. P., Suručić, L. T., Dapčević, A., Džunuzović, J. V., Jagličić, Z., Vuković, Z. M., Pavlović, V.,& Onjia, A. E.. (2022). Novel Magnetic Polymer/bentonite Composite: Characterization and Application for Re(VII) and W(VI) Adsorption. in Science of Sintering
International Institute for the Science of Sintering (IISS)., 53(4), 419-428.
https://doi.org/10.2298/SOS2104419M

Marković BM, Stefanović IS, Nastasović AB, Sandić ZP, Suručić LT, Dapčević A, Džunuzović JV, Jagličić Z, Vuković ZM, Pavlović V, Onjia AE. Novel Magnetic Polymer/bentonite Composite: Characterization and Application for Re(VII) and W(VI) Adsorption. in Science of Sintering. 2022;53(4):419-428.
doi:10.2298/SOS2104419M .

Marković, Bojana M., Stefanović, Ivan S., Nastasović, Aleksandra B., Sandić, Zvjezdana P., Suručić, Ljiljana T., Dapčević, Aleksandra, Džunuzović, Jasna V., Jagličić, Zvonko, Vuković, Zorica M., Pavlović, Vladimir, Onjia, Antonije E., "Novel Magnetic Polymer/bentonite Composite: Characterization and Application for Re(VII) and W(VI) Adsorption" in Science of Sintering, 53, no. 4 (2022):419-428,
https://doi.org/10.2298/SOS2104419M . .

TY  - JOUR
AU  - Todorović, Žaklina N.
AU  - Radulović, Jelena M.
AU  - Sredović Ignjatović, Ivana D.
AU  - Ignjatović, Ljubiša M.
AU  - Onjia, Antonije E.
PY  - 2021
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5924
AB  - Seventeen water-soluble substances (of sodium, ammonium, potassium, magnesium, calcium, formate, methanesulfonate, glyoxylate, chloride, nitrite, nitrate, glutarate, succinate, malate, malonate, sulfate and oxalate) in 94 samples of particle matter in the ambient air, collected over ten months, in a suburb of Belgrade (Serbia), were determined by ion chromatography. To apportion the sources of the air pollution, the log-transformed data were processed by applying multivariate techniques. Principal component and factor analysis identified three main factors controlling the data variability: stationary combustion processes with the highest loadings of oxalate, malonate and malate; landfill emission and secondary inorganic aerosol characterized by high levels of ammonium, nitrate and sulfate; a contribution of mineral dust composed of magnesium, calcium and chloride. The hierarchical cluster analysis pointed out a differentiation of the samples into five groups belonging to different variables inputs. For the classification of ambient air samples using nine selected ions, the recognition ability of linear discriminant analysis, k-nearest neighbors, and soft independent modeling of class analogy were 87.0, 94.6, and 97.8 %, respectively. Time-series analysis showed that the traffic emission is more pronounced in winter in contrast to the mineral dust influence, while the effect of waste combustion exhibits no trend.
PB  - Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Ambient air particles: The use of ion chromatography and multivariate techniques in the analysis of water-soluble substances
EP  - 766
IS  - 7-8
SP  - 753
VL  - 86
DO  - 10.2298/JSC200826077T
ER  - 

@article{
author = "Todorović, Žaklina N. and Radulović, Jelena M. and Sredović Ignjatović, Ivana D. and Ignjatović, Ljubiša M. and Onjia, Antonije E.",
year = "2021",
abstract = "Seventeen water-soluble substances (of sodium, ammonium, potassium, magnesium, calcium, formate, methanesulfonate, glyoxylate, chloride, nitrite, nitrate, glutarate, succinate, malate, malonate, sulfate and oxalate) in 94 samples of particle matter in the ambient air, collected over ten months, in a suburb of Belgrade (Serbia), were determined by ion chromatography. To apportion the sources of the air pollution, the log-transformed data were processed by applying multivariate techniques. Principal component and factor analysis identified three main factors controlling the data variability: stationary combustion processes with the highest loadings of oxalate, malonate and malate; landfill emission and secondary inorganic aerosol characterized by high levels of ammonium, nitrate and sulfate; a contribution of mineral dust composed of magnesium, calcium and chloride. The hierarchical cluster analysis pointed out a differentiation of the samples into five groups belonging to different variables inputs. For the classification of ambient air samples using nine selected ions, the recognition ability of linear discriminant analysis, k-nearest neighbors, and soft independent modeling of class analogy were 87.0, 94.6, and 97.8 %, respectively. Time-series analysis showed that the traffic emission is more pronounced in winter in contrast to the mineral dust influence, while the effect of waste combustion exhibits no trend.",
publisher = "Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Ambient air particles: The use of ion chromatography and multivariate techniques in the analysis of water-soluble substances",
pages = "766-753",
number = "7-8",
volume = "86",
doi = "10.2298/JSC200826077T"
}

Todorović, Ž. N., Radulović, J. M., Sredović Ignjatović, I. D., Ignjatović, L. M.,& Onjia, A. E.. (2021). Ambient air particles: The use of ion chromatography and multivariate techniques in the analysis of water-soluble substances. in Journal of the Serbian Chemical Society
Serbian Chemical Society., 86(7-8), 753-766.
https://doi.org/10.2298/JSC200826077T

Todorović ŽN, Radulović JM, Sredović Ignjatović ID, Ignjatović LM, Onjia AE. Ambient air particles: The use of ion chromatography and multivariate techniques in the analysis of water-soluble substances. in Journal of the Serbian Chemical Society. 2021;86(7-8):753-766.
doi:10.2298/JSC200826077T .

Todorović, Žaklina N., Radulović, Jelena M., Sredović Ignjatović, Ivana D., Ignjatović, Ljubiša M., Onjia, Antonije E., "Ambient air particles: The use of ion chromatography and multivariate techniques in the analysis of water-soluble substances" in Journal of the Serbian Chemical Society, 86, no. 7-8 (2021):753-766,
https://doi.org/10.2298/JSC200826077T . .

TY  - JOUR
AU  - Marković, Bojana M.
AU  - Vuković, Zorica M.
AU  - Spasojević, Vojislav V.
AU  - Kusigerski, Vladan B.
AU  - Pavlović, Vladimir
AU  - Onjia, Antonije E.
AU  - Nastasović, Aleksandra B.
PY  - 2017
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/4383
AB  - Magnetic macroporous crosslinked copolymer glycidyl methacrylate (GMA) and ethylene glycol dimethacrylate (EGDMA) samples with different magnetite content were prepared by suspension copolymerization and functionalized with diethylene triamine. Samples were characterized by elemental analysis, mercury porosimetry, Fourier transform infrared spectroscopy (FTIR) analysis, scanning electron microscopy with energy-dispersive X-ray spectroscopy, transmission electron microscopy, SQUID magnetometry and X-ray photoelectron spectroscopy (XPS). The selected amino-functionalized sample was tested as a potential sorbent for the Mo(VI) and Re(VII) oxyanions from aqueous solutions. The influence of pH, ionic strength and possible interfering of cations and anions was investigated. Equilibrium data were analyzed with Langmuir, Freundlich and Tempkin adsorption isotherm models. Sorption studies were carried out in a batch competitive experiments, in the pH range 1-8, at 298 K. Obtained results indicate that 92% of Re(VII) and 98% of Mo(VI) were sorbed at pH 2.
PB  - Elsevier Science Sa, Lausanne
T2  - Journal of Alloys and Compounds
T1  - Selective magnetic GMA based potential sorbents for molybdenum and rhenium sorption
EP  - 50
SP  - 38
VL  - 705
DO  - 10.1016/j.jallcom.2017.02.108
ER  - 

@article{
author = "Marković, Bojana M. and Vuković, Zorica M. and Spasojević, Vojislav V. and Kusigerski, Vladan B. and Pavlović, Vladimir and Onjia, Antonije E. and Nastasović, Aleksandra B.",
year = "2017",
abstract = "Magnetic macroporous crosslinked copolymer glycidyl methacrylate (GMA) and ethylene glycol dimethacrylate (EGDMA) samples with different magnetite content were prepared by suspension copolymerization and functionalized with diethylene triamine. Samples were characterized by elemental analysis, mercury porosimetry, Fourier transform infrared spectroscopy (FTIR) analysis, scanning electron microscopy with energy-dispersive X-ray spectroscopy, transmission electron microscopy, SQUID magnetometry and X-ray photoelectron spectroscopy (XPS). The selected amino-functionalized sample was tested as a potential sorbent for the Mo(VI) and Re(VII) oxyanions from aqueous solutions. The influence of pH, ionic strength and possible interfering of cations and anions was investigated. Equilibrium data were analyzed with Langmuir, Freundlich and Tempkin adsorption isotherm models. Sorption studies were carried out in a batch competitive experiments, in the pH range 1-8, at 298 K. Obtained results indicate that 92% of Re(VII) and 98% of Mo(VI) were sorbed at pH 2.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Journal of Alloys and Compounds",
title = "Selective magnetic GMA based potential sorbents for molybdenum and rhenium sorption",
pages = "50-38",
volume = "705",
doi = "10.1016/j.jallcom.2017.02.108"
}

Marković, B. M., Vuković, Z. M., Spasojević, V. V., Kusigerski, V. B., Pavlović, V., Onjia, A. E.,& Nastasović, A. B.. (2017). Selective magnetic GMA based potential sorbents for molybdenum and rhenium sorption. in Journal of Alloys and Compounds
Elsevier Science Sa, Lausanne., 705, 38-50.
https://doi.org/10.1016/j.jallcom.2017.02.108

Marković BM, Vuković ZM, Spasojević VV, Kusigerski VB, Pavlović V, Onjia AE, Nastasović AB. Selective magnetic GMA based potential sorbents for molybdenum and rhenium sorption. in Journal of Alloys and Compounds. 2017;705:38-50.
doi:10.1016/j.jallcom.2017.02.108 .

Marković, Bojana M., Vuković, Zorica M., Spasojević, Vojislav V., Kusigerski, Vladan B., Pavlović, Vladimir, Onjia, Antonije E., Nastasović, Aleksandra B., "Selective magnetic GMA based potential sorbents for molybdenum and rhenium sorption" in Journal of Alloys and Compounds, 705 (2017):38-50,
https://doi.org/10.1016/j.jallcom.2017.02.108 . .

TY  - JOUR
AU  - Sredović-Ignjatović, Ivana
AU  - Onjia, Antonije E.
AU  - Ignjatović, Ljubiša M.
AU  - Todorović, Zaklina N.
AU  - Rajaković, Ljubinka V.
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3706
AB  - Determination of total halogens in coal was investigated with oxygen bomb combustion followed by ion chromatography. Experimental parameters were optimized by fractional factorial design and response surface methodology. Fractional factorial design was employed in screening experiments to evaluate the influence of the oxygen pressure, catalyst, absorption solution, reduction reagent, bomb cooling time, and a combustion aid on the combustion of coal in an oxygen bomb. Response surface methodology was conducted to further refine the results obtained by fractional factorial design and to define parameters for the procedure. The accuracy and precision of combustion with ion chromatography were evaluated by the use of two certified reference materials and by fortified in-house coal standards. The limits of detection and quantification for total halogens were 0.84 and 2.80 milligrams per kilogram, respectively, for 500 milligram samples. Ion chromatography provided relative standard deviations less than 4 percent, recoveries exceeding 95 percent, and was convenient. This method is recommended for routine determination of total halogens in coal because of its reliability.
PB  - Taylor & Francis Inc, Philadelphia
T2  - Analytical Letters
T1  - Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography
EP  - 2612
IS  - 16
SP  - 2597
VL  - 48
DO  - 10.1080/00032719.2015.1041029
ER  - 

@article{
author = "Sredović-Ignjatović, Ivana and Onjia, Antonije E. and Ignjatović, Ljubiša M. and Todorović, Zaklina N. and Rajaković, Ljubinka V.",
year = "2015",
abstract = "Determination of total halogens in coal was investigated with oxygen bomb combustion followed by ion chromatography. Experimental parameters were optimized by fractional factorial design and response surface methodology. Fractional factorial design was employed in screening experiments to evaluate the influence of the oxygen pressure, catalyst, absorption solution, reduction reagent, bomb cooling time, and a combustion aid on the combustion of coal in an oxygen bomb. Response surface methodology was conducted to further refine the results obtained by fractional factorial design and to define parameters for the procedure. The accuracy and precision of combustion with ion chromatography were evaluated by the use of two certified reference materials and by fortified in-house coal standards. The limits of detection and quantification for total halogens were 0.84 and 2.80 milligrams per kilogram, respectively, for 500 milligram samples. Ion chromatography provided relative standard deviations less than 4 percent, recoveries exceeding 95 percent, and was convenient. This method is recommended for routine determination of total halogens in coal because of its reliability.",
publisher = "Taylor & Francis Inc, Philadelphia",
journal = "Analytical Letters",
title = "Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography",
pages = "2612-2597",
number = "16",
volume = "48",
doi = "10.1080/00032719.2015.1041029"
}

Sredović-Ignjatović, I., Onjia, A. E., Ignjatović, L. M., Todorović, Z. N.,& Rajaković, L. V.. (2015). Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography. in Analytical Letters
Taylor & Francis Inc, Philadelphia., 48(16), 2597-2612.
https://doi.org/10.1080/00032719.2015.1041029

Sredović-Ignjatović I, Onjia AE, Ignjatović LM, Todorović ZN, Rajaković LV. Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography. in Analytical Letters. 2015;48(16):2597-2612.
doi:10.1080/00032719.2015.1041029 .

Sredović-Ignjatović, Ivana, Onjia, Antonije E., Ignjatović, Ljubiša M., Todorović, Zaklina N., Rajaković, Ljubinka V., "Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography" in Analytical Letters, 48, no. 16 (2015):2597-2612,
https://doi.org/10.1080/00032719.2015.1041029 . .

TY  - JOUR
AU  - Sredović-Ignjatović, Ivana
AU  - Onjia, Antonije E.
AU  - Ignjatović, Ljubiša M.
AU  - Todorović, Zaklina N.
AU  - Rajaković, Ljubinka V.
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5764
AB  - Determination of total halogens in coal was investigated with oxygen bomb combustion followed by ion chromatography. Experimental parameters were optimized by fractional factorial design and response surface methodology. Fractional factorial design was employed in screening experiments to evaluate the influence of the oxygen pressure, catalyst, absorption solution, reduction reagent, bomb cooling time, and a combustion aid on the combustion of coal in an oxygen bomb. Response surface methodology was conducted to further refine the results obtained by fractional factorial design and to define parameters for the procedure. The accuracy and precision of combustion with ion chromatography were evaluated by the use of two certified reference materials and by fortified in-house coal standards. The limits of detection and quantification for total halogens were 0.84 and 2.80 milligrams per kilogram, respectively, for 500 milligram samples. Ion chromatography provided relative standard deviations less than 4 percent, recoveries exceeding 95 percent, and was convenient. This method is recommended for routine determination of total halogens in coal because of its reliability.
PB  - Taylor & Francis Inc, Philadelphia
T2  - Analytical Letters
T1  - Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography
EP  - 2612
IS  - 16
SP  - 2597
VL  - 48
DO  - 10.1080/00032719.2015.1041029
ER  - 

@article{
author = "Sredović-Ignjatović, Ivana and Onjia, Antonije E. and Ignjatović, Ljubiša M. and Todorović, Zaklina N. and Rajaković, Ljubinka V.",
year = "2015",
abstract = "Determination of total halogens in coal was investigated with oxygen bomb combustion followed by ion chromatography. Experimental parameters were optimized by fractional factorial design and response surface methodology. Fractional factorial design was employed in screening experiments to evaluate the influence of the oxygen pressure, catalyst, absorption solution, reduction reagent, bomb cooling time, and a combustion aid on the combustion of coal in an oxygen bomb. Response surface methodology was conducted to further refine the results obtained by fractional factorial design and to define parameters for the procedure. The accuracy and precision of combustion with ion chromatography were evaluated by the use of two certified reference materials and by fortified in-house coal standards. The limits of detection and quantification for total halogens were 0.84 and 2.80 milligrams per kilogram, respectively, for 500 milligram samples. Ion chromatography provided relative standard deviations less than 4 percent, recoveries exceeding 95 percent, and was convenient. This method is recommended for routine determination of total halogens in coal because of its reliability.",
publisher = "Taylor & Francis Inc, Philadelphia",
journal = "Analytical Letters",
title = "Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography",
pages = "2612-2597",
number = "16",
volume = "48",
doi = "10.1080/00032719.2015.1041029"
}

Sredović-Ignjatović, I., Onjia, A. E., Ignjatović, L. M., Todorović, Z. N.,& Rajaković, L. V.. (2015). Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography. in Analytical Letters
Taylor & Francis Inc, Philadelphia., 48(16), 2597-2612.
https://doi.org/10.1080/00032719.2015.1041029

Sredović-Ignjatović I, Onjia AE, Ignjatović LM, Todorović ZN, Rajaković LV. Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography. in Analytical Letters. 2015;48(16):2597-2612.
doi:10.1080/00032719.2015.1041029 .

Sredović-Ignjatović, Ivana, Onjia, Antonije E., Ignjatović, Ljubiša M., Todorović, Zaklina N., Rajaković, Ljubinka V., "Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography" in Analytical Letters, 48, no. 16 (2015):2597-2612,
https://doi.org/10.1080/00032719.2015.1041029 . .

TY  - JOUR
AU  - Dragović, Ranko
AU  - Gajić, Boško
AU  - Dragović, Snežana
AU  - Djordjević, Miodrag
AU  - Djordjević, Milan
AU  - Mihailović, Nevena
AU  - Onjia, Antonije E.
PY  - 2014
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3476
AB  - The concentration of heavy metals (Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn) in surface soils in the area surrounding the steel production facility in Serbia was determined to assess the contribution of emissions to pollution. The mean concentrations of Cd, Co, Cu, Ni, Pb and Zn were found to be higher than values reported for uncultivated soils world-wide and also exceeded mean concentrations of metals in European soil. Analysis of variance revealed the influence of latitude, longitude and distance from the emission source on heavy metal concentrations in soil. Multivariate statistical techniques (cluster analysis and factor analysis) confirmed previous findings and were also used to investigate relationships between heavy metal concentrations and soil particle size fractions. Regression analysis showed that the latitude, longitude and distance from the source are good predictors of heavy metal concentrations in soil. Geostatistical analysis revealed the spatial distribution of heavy metal concentrations in soil and their correlation with prevailing winds in the investigated area.
PB  - Elsevier Sci Ltd, Oxford
T2  - Journal of Cleaner Production
T1  - Assessment of the impact of geographical factors on the spatial distribution of heavy metals in soils around the steel production facility in Smederevo (Serbia)
EP  - 562
SP  - 550
VL  - 84
DO  - 10.1016/j.jclepro.2014.03.060
ER  - 

@article{
author = "Dragović, Ranko and Gajić, Boško and Dragović, Snežana and Djordjević, Miodrag and Djordjević, Milan and Mihailović, Nevena and Onjia, Antonije E.",
year = "2014",
abstract = "The concentration of heavy metals (Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn) in surface soils in the area surrounding the steel production facility in Serbia was determined to assess the contribution of emissions to pollution. The mean concentrations of Cd, Co, Cu, Ni, Pb and Zn were found to be higher than values reported for uncultivated soils world-wide and also exceeded mean concentrations of metals in European soil. Analysis of variance revealed the influence of latitude, longitude and distance from the emission source on heavy metal concentrations in soil. Multivariate statistical techniques (cluster analysis and factor analysis) confirmed previous findings and were also used to investigate relationships between heavy metal concentrations and soil particle size fractions. Regression analysis showed that the latitude, longitude and distance from the source are good predictors of heavy metal concentrations in soil. Geostatistical analysis revealed the spatial distribution of heavy metal concentrations in soil and their correlation with prevailing winds in the investigated area.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Journal of Cleaner Production",
title = "Assessment of the impact of geographical factors on the spatial distribution of heavy metals in soils around the steel production facility in Smederevo (Serbia)",
pages = "562-550",
volume = "84",
doi = "10.1016/j.jclepro.2014.03.060"
}

Dragović, R., Gajić, B., Dragović, S., Djordjević, M., Djordjević, M., Mihailović, N.,& Onjia, A. E.. (2014). Assessment of the impact of geographical factors on the spatial distribution of heavy metals in soils around the steel production facility in Smederevo (Serbia). in Journal of Cleaner Production
Elsevier Sci Ltd, Oxford., 84, 550-562.
https://doi.org/10.1016/j.jclepro.2014.03.060

Dragović R, Gajić B, Dragović S, Djordjević M, Djordjević M, Mihailović N, Onjia AE. Assessment of the impact of geographical factors on the spatial distribution of heavy metals in soils around the steel production facility in Smederevo (Serbia). in Journal of Cleaner Production. 2014;84:550-562.
doi:10.1016/j.jclepro.2014.03.060 .

Dragović, Ranko, Gajić, Boško, Dragović, Snežana, Djordjević, Miodrag, Djordjević, Milan, Mihailović, Nevena, Onjia, Antonije E., "Assessment of the impact of geographical factors on the spatial distribution of heavy metals in soils around the steel production facility in Smederevo (Serbia)" in Journal of Cleaner Production, 84 (2014):550-562,
https://doi.org/10.1016/j.jclepro.2014.03.060 . .

TY  - JOUR
AU  - Dragović, Snežana
AU  - Cujić, Mirjana
AU  - Slavković-Beskoski, Latinka
AU  - Gajić, Boško
AU  - Bajat, Branislav
AU  - Kilibarda, Milan
AU  - Onjia, Antonije E.
PY  - 2013
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3273
AB  - The content of trace elements (As, Cd, Co, Cr, Cu, Hg, Mn, Ni, Pb and Zn) in surface soils in the area surrounding the largest coal-fired power plant in Serbia was determined to assess the contribution of emissions to pollution. Analysis of mutual associations between the trace elements and their correlation with soil particle size fractions indicated anthropogenic origin at most sampling sites. Enrichment factor analysis confirmed these findings. Common patterns in trace element concentrations of the analysed soils were identified by hierarchical cluster analysis. Explanatory spatial analysis, used for characterization and mapping of spatial variability patterns, revealed the highest concentrations of trace elements in areas in predominant wind directions.
PB  - Elsevier Science Bv, Amsterdam
T2  - Catena
T1  - Trace element distribution in surface soils from a coal burning power production area: A case study from the largest power plant site in Serbia
EP  - 296
SP  - 288
VL  - 104
DO  - 10.1016/j.catena.2012.12.004
ER  - 

@article{
author = "Dragović, Snežana and Cujić, Mirjana and Slavković-Beskoski, Latinka and Gajić, Boško and Bajat, Branislav and Kilibarda, Milan and Onjia, Antonije E.",
year = "2013",
abstract = "The content of trace elements (As, Cd, Co, Cr, Cu, Hg, Mn, Ni, Pb and Zn) in surface soils in the area surrounding the largest coal-fired power plant in Serbia was determined to assess the contribution of emissions to pollution. Analysis of mutual associations between the trace elements and their correlation with soil particle size fractions indicated anthropogenic origin at most sampling sites. Enrichment factor analysis confirmed these findings. Common patterns in trace element concentrations of the analysed soils were identified by hierarchical cluster analysis. Explanatory spatial analysis, used for characterization and mapping of spatial variability patterns, revealed the highest concentrations of trace elements in areas in predominant wind directions.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Catena",
title = "Trace element distribution in surface soils from a coal burning power production area: A case study from the largest power plant site in Serbia",
pages = "296-288",
volume = "104",
doi = "10.1016/j.catena.2012.12.004"
}

Dragović, S., Cujić, M., Slavković-Beskoski, L., Gajić, B., Bajat, B., Kilibarda, M.,& Onjia, A. E.. (2013). Trace element distribution in surface soils from a coal burning power production area: A case study from the largest power plant site in Serbia. in Catena
Elsevier Science Bv, Amsterdam., 104, 288-296.
https://doi.org/10.1016/j.catena.2012.12.004

Dragović S, Cujić M, Slavković-Beskoski L, Gajić B, Bajat B, Kilibarda M, Onjia AE. Trace element distribution in surface soils from a coal burning power production area: A case study from the largest power plant site in Serbia. in Catena. 2013;104:288-296.
doi:10.1016/j.catena.2012.12.004 .

Dragović, Snežana, Cujić, Mirjana, Slavković-Beskoski, Latinka, Gajić, Boško, Bajat, Branislav, Kilibarda, Milan, Onjia, Antonije E., "Trace element distribution in surface soils from a coal burning power production area: A case study from the largest power plant site in Serbia" in Catena, 104 (2013):288-296,
https://doi.org/10.1016/j.catena.2012.12.004 . .