TY  - JOUR
AU  - Stojanović, Srna R.
AU  - Vranješ, Mila
AU  - Šaponjić, Zoran
AU  - Rac, Vladislav
AU  - Rakić, Vesna M.
AU  - Ignjatović, Ljubiša M.
AU  - Damjanović-Vasilić, Ljiljana S.
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10343
AB  - Removal of the β-blocker atenolol from an aqueous solution was studied using TiO2/zeolites, prepared by a simple and cost-effective solid-state dispersion method. Synthetic zeolites 13X and ZSM-5 (Si/Al = 40) and natural zeolite clinoptilolite were used as one component of the hybrid materials, whereas TiO2 nanocrystals obtained from TiO2 nanotubes and P25 TiO2 nanoparticles were used as the other. The synthesized materials were characterized by X-ray powder diffraction, transmission electron microscopy, Fourier transformed infrared spectroscopy, ultraviolet–visible diffuse reflectance spectroscopy and scanning electron microscopy with energy-dispersive spectroscopy. The photocatalytic activity for the degradation of atenolol was investigated under simulated solar light. Additionally, the effect of initial pH on atenolol removal and the reusability of prepared catalysts were tested. The best loading of TiO2 was 20 wt% over all investigated zeolites. The degradation of atenolol followed the pseudo-first-order kinetics. The photocatalytic degradation of atenolol after 70 min of irradiation was ~ 50% for TiO2/13X materials, ~ 45% for clinoptilolite combined with P25 TiO2 and ~ 57% for clinoptilolite combined with TiO2 nanocrystals obtained from TiO2 nanotubes. The results showed the highest removal efficiency after 70 min of irradiation for ZSM-5 combined with P25 TiO2 (~ 94%), followed by ZSM-5 combined with TiO2 nanocrystals obtained from TiO2 nanotubes (~ 88%) at near-neutral pH (~ 6.5). The total removal of atenolol from an aqueous solution for TiO2/ZSM-5 materials resulted from two processes: adsorption and photocatalytic degradation. The TiO2/ZSM-5 photocatalysts can be easily recovered and reused as their activity was preserved after four cycles.
T2  - International Journal of Environmental Science and Technology
T1  - Photocatalytic performance of TiO2/zeolites under simulated solar light for removal of atenolol from aqueous solution
DO  - 10.1007/s13762-022-04305-6
ER  - 

@article{
author = "Stojanović, Srna R. and Vranješ, Mila and Šaponjić, Zoran and Rac, Vladislav and Rakić, Vesna M. and Ignjatović, Ljubiša M. and Damjanović-Vasilić, Ljiljana S.",
year = "2022",
abstract = "Removal of the β-blocker atenolol from an aqueous solution was studied using TiO2/zeolites, prepared by a simple and cost-effective solid-state dispersion method. Synthetic zeolites 13X and ZSM-5 (Si/Al = 40) and natural zeolite clinoptilolite were used as one component of the hybrid materials, whereas TiO2 nanocrystals obtained from TiO2 nanotubes and P25 TiO2 nanoparticles were used as the other. The synthesized materials were characterized by X-ray powder diffraction, transmission electron microscopy, Fourier transformed infrared spectroscopy, ultraviolet–visible diffuse reflectance spectroscopy and scanning electron microscopy with energy-dispersive spectroscopy. The photocatalytic activity for the degradation of atenolol was investigated under simulated solar light. Additionally, the effect of initial pH on atenolol removal and the reusability of prepared catalysts were tested. The best loading of TiO2 was 20 wt% over all investigated zeolites. The degradation of atenolol followed the pseudo-first-order kinetics. The photocatalytic degradation of atenolol after 70 min of irradiation was ~ 50% for TiO2/13X materials, ~ 45% for clinoptilolite combined with P25 TiO2 and ~ 57% for clinoptilolite combined with TiO2 nanocrystals obtained from TiO2 nanotubes. The results showed the highest removal efficiency after 70 min of irradiation for ZSM-5 combined with P25 TiO2 (~ 94%), followed by ZSM-5 combined with TiO2 nanocrystals obtained from TiO2 nanotubes (~ 88%) at near-neutral pH (~ 6.5). The total removal of atenolol from an aqueous solution for TiO2/ZSM-5 materials resulted from two processes: adsorption and photocatalytic degradation. The TiO2/ZSM-5 photocatalysts can be easily recovered and reused as their activity was preserved after four cycles.",
journal = "International Journal of Environmental Science and Technology",
title = "Photocatalytic performance of TiO2/zeolites under simulated solar light for removal of atenolol from aqueous solution",
doi = "10.1007/s13762-022-04305-6"
}

Stojanović, S. R., Vranješ, M., Šaponjić, Z., Rac, V., Rakić, V. M., Ignjatović, L. M.,& Damjanović-Vasilić, L. S.. (2022). Photocatalytic performance of TiO2/zeolites under simulated solar light for removal of atenolol from aqueous solution. in International Journal of Environmental Science and Technology.
https://doi.org/10.1007/s13762-022-04305-6

Stojanović SR, Vranješ M, Šaponjić Z, Rac V, Rakić VM, Ignjatović LM, Damjanović-Vasilić LS. Photocatalytic performance of TiO2/zeolites under simulated solar light for removal of atenolol from aqueous solution. in International Journal of Environmental Science and Technology. 2022;.
doi:10.1007/s13762-022-04305-6 .

Stojanović, Srna R., Vranješ, Mila, Šaponjić, Zoran, Rac, Vladislav, Rakić, Vesna M., Ignjatović, Ljubiša M., Damjanović-Vasilić, Ljiljana S., "Photocatalytic performance of TiO2/zeolites under simulated solar light for removal of atenolol from aqueous solution" in International Journal of Environmental Science and Technology (2022),
https://doi.org/10.1007/s13762-022-04305-6 . .

TY  - JOUR
AU  - Marić, Slađana
AU  - Jocić, Ana
AU  - Krstić, Aleksandar
AU  - Momčilović, Miloš
AU  - Ignjatović, Ljubiša M.
AU  - Dimitrijević, Aleksandra
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9845
AB  - Unused/expired pharmaceuticals can be regarded as a source of valuable compounds. Valorization of active pharmaceutical ingredients (APIs) from pharmaceutical waste, as an alternative to widely adopted treatment by incineration, is a big challenge in terms of designing green, efficient, scalable and sustainable separation methods. Concerning these demands, this work aimed to investigate and propose new integrated extraction technology based on aqueous biphasic systems (ABS) with eco-friendly components namely, poloxamer (Pluronic PE 6200) and one of two salts (sodium citrate, cholinium dihydrogenphosphate) or ionic liquid (1-butyl-3-methylimidazolium chloride). Liquid-liquid equilibria of each ABS were determined at room temperature followed by partition experiments in the biphasic medium to evaluate the most favorable systems for APIs extraction (acetaminophen and caffeine from one commercial product, and theophylline from the other). The finely designed ABSs were then employed to separate APIs from pharmaceutical solids and fractionate them. The results show that citrate-based ABS induces the strongest salting-out effect leading to extraction of all APIs to the Pluronic-rich phase with high recovery efficiencies between 79.4 and 97.90%; insoluble compounds were removed as residues while hydrophilic excipients remained in the citrate-rich aqueous phase. Ionic liquid/PL6200-based ABS was further applied to fractionate acetaminophen and caffeine toward opposite phases. These results underpin the viability and adjustability of PL6200-based ABSs within an integrated process, by a deftly selected salting-out agent, as a sustainable and efficient alternative platform with the great potential to be implemented on a larger scale.
T2  - Separation and Purification Technology
T1  - Poloxamer-based aqueous biphasic systems in designing an integrated extraction platform for the valorization of pharmaceutical waste
VL  - 275
SP  - 119101
DO  - 10.1016/j.seppur.2021.119101
ER  - 

@article{
author = "Marić, Slađana and Jocić, Ana and Krstić, Aleksandar and Momčilović, Miloš and Ignjatović, Ljubiša M. and Dimitrijević, Aleksandra",
year = "2021",
abstract = "Unused/expired pharmaceuticals can be regarded as a source of valuable compounds. Valorization of active pharmaceutical ingredients (APIs) from pharmaceutical waste, as an alternative to widely adopted treatment by incineration, is a big challenge in terms of designing green, efficient, scalable and sustainable separation methods. Concerning these demands, this work aimed to investigate and propose new integrated extraction technology based on aqueous biphasic systems (ABS) with eco-friendly components namely, poloxamer (Pluronic PE 6200) and one of two salts (sodium citrate, cholinium dihydrogenphosphate) or ionic liquid (1-butyl-3-methylimidazolium chloride). Liquid-liquid equilibria of each ABS were determined at room temperature followed by partition experiments in the biphasic medium to evaluate the most favorable systems for APIs extraction (acetaminophen and caffeine from one commercial product, and theophylline from the other). The finely designed ABSs were then employed to separate APIs from pharmaceutical solids and fractionate them. The results show that citrate-based ABS induces the strongest salting-out effect leading to extraction of all APIs to the Pluronic-rich phase with high recovery efficiencies between 79.4 and 97.90%; insoluble compounds were removed as residues while hydrophilic excipients remained in the citrate-rich aqueous phase. Ionic liquid/PL6200-based ABS was further applied to fractionate acetaminophen and caffeine toward opposite phases. These results underpin the viability and adjustability of PL6200-based ABSs within an integrated process, by a deftly selected salting-out agent, as a sustainable and efficient alternative platform with the great potential to be implemented on a larger scale.",
journal = "Separation and Purification Technology",
title = "Poloxamer-based aqueous biphasic systems in designing an integrated extraction platform for the valorization of pharmaceutical waste",
volume = "275",
pages = "119101",
doi = "10.1016/j.seppur.2021.119101"
}

Marić, S., Jocić, A., Krstić, A., Momčilović, M., Ignjatović, L. M.,& Dimitrijević, A.. (2021). Poloxamer-based aqueous biphasic systems in designing an integrated extraction platform for the valorization of pharmaceutical waste. in Separation and Purification Technology, 275, 119101.
https://doi.org/10.1016/j.seppur.2021.119101

Marić S, Jocić A, Krstić A, Momčilović M, Ignjatović LM, Dimitrijević A. Poloxamer-based aqueous biphasic systems in designing an integrated extraction platform for the valorization of pharmaceutical waste. in Separation and Purification Technology. 2021;275:119101.
doi:10.1016/j.seppur.2021.119101 .

Marić, Slađana, Jocić, Ana, Krstić, Aleksandar, Momčilović, Miloš, Ignjatović, Ljubiša M., Dimitrijević, Aleksandra, "Poloxamer-based aqueous biphasic systems in designing an integrated extraction platform for the valorization of pharmaceutical waste" in Separation and Purification Technology, 275 (2021):119101,
https://doi.org/10.1016/j.seppur.2021.119101 . .

TY  - JOUR
AU  - Todorović, Marija N.
AU  - Radenković, Mirjana
AU  - Onjia, Antonije E.
AU  - Ignjatović, Ljubiša M.
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9105
AB  - Designated as the most harmful for health, PM2.5 aerosol fraction was a subject of our study. It was collected for all four seasons during 2014/15 in the suburban area of Belgrade (Serbia) and analysed for Al, Si, P, S, Cl, K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, Br, As, Ba and Pb elements and for NH4+, NO3− and SO42− ions by particle-induced X-ray emission and ion chromatography techniques, respectively. Obtained concentrations have been treated by a combination of several receptor-oriented models to reveal source contributions to the suburban PM2.5 at different spatial scales. Applied positive matrix factorization analysis indicated five main groups of emission sources: biomass burning (14.5%), traffic (3.9%), regional combustion/secondary sulphates (28.8%), local combustion/secondary nitrates (29.7%) and soil (5.4%). Local heating units had been pointed out as dominant contributors by long-range transport and ground-wind circulation analyses. Air masses circulating over the Balkan Peninsula denoted regional emissions as responsible for the high concentrations of secondary sulphates. Local and long-range transport analyses combined suggested that the BB and the LC/NO3 originated from the wider urban area. Several Saharan dust episodes were detected as well. Presented results might be a basis for the development of air pollution mitigation strategies in the continental Balkan area, considered one of the most polluted and under-investigated European regions.
T2  - Environmental Science and Pollution Research
T1  - Characterization of PM2.5 sources in a Belgrade suburban area: a multi-scale receptor-oriented approach
VL  - 27
IS  - 33
SP  - 41717
EP  - 41730
DO  - 10.1007/s11356-020-10129-z
ER  - 

@article{
author = "Todorović, Marija N. and Radenković, Mirjana and Onjia, Antonije E. and Ignjatović, Ljubiša M.",
year = "2020",
abstract = "Designated as the most harmful for health, PM2.5 aerosol fraction was a subject of our study. It was collected for all four seasons during 2014/15 in the suburban area of Belgrade (Serbia) and analysed for Al, Si, P, S, Cl, K, Ca, Ti, V, Cr, Mn, Fe, Ni, Cu, Zn, Br, As, Ba and Pb elements and for NH4+, NO3− and SO42− ions by particle-induced X-ray emission and ion chromatography techniques, respectively. Obtained concentrations have been treated by a combination of several receptor-oriented models to reveal source contributions to the suburban PM2.5 at different spatial scales. Applied positive matrix factorization analysis indicated five main groups of emission sources: biomass burning (14.5%), traffic (3.9%), regional combustion/secondary sulphates (28.8%), local combustion/secondary nitrates (29.7%) and soil (5.4%). Local heating units had been pointed out as dominant contributors by long-range transport and ground-wind circulation analyses. Air masses circulating over the Balkan Peninsula denoted regional emissions as responsible for the high concentrations of secondary sulphates. Local and long-range transport analyses combined suggested that the BB and the LC/NO3 originated from the wider urban area. Several Saharan dust episodes were detected as well. Presented results might be a basis for the development of air pollution mitigation strategies in the continental Balkan area, considered one of the most polluted and under-investigated European regions.",
journal = "Environmental Science and Pollution Research",
title = "Characterization of PM2.5 sources in a Belgrade suburban area: a multi-scale receptor-oriented approach",
volume = "27",
number = "33",
pages = "41717-41730",
doi = "10.1007/s11356-020-10129-z"
}

Todorović, M. N., Radenković, M., Onjia, A. E.,& Ignjatović, L. M.. (2020). Characterization of PM2.5 sources in a Belgrade suburban area: a multi-scale receptor-oriented approach. in Environmental Science and Pollution Research, 27(33), 41717-41730.
https://doi.org/10.1007/s11356-020-10129-z

Todorović MN, Radenković M, Onjia AE, Ignjatović LM. Characterization of PM2.5 sources in a Belgrade suburban area: a multi-scale receptor-oriented approach. in Environmental Science and Pollution Research. 2020;27(33):41717-41730.
doi:10.1007/s11356-020-10129-z .

Todorović, Marija N., Radenković, Mirjana, Onjia, Antonije E., Ignjatović, Ljubiša M., "Characterization of PM2.5 sources in a Belgrade suburban area: a multi-scale receptor-oriented approach" in Environmental Science and Pollution Research, 27, no. 33 (2020):41717-41730,
https://doi.org/10.1007/s11356-020-10129-z . .

TY  - JOUR
AU  - Todorović, Marija N.
AU  - Radenković, Mirjana
AU  - Rajšić, Slavica F.
AU  - Ignjatović, Ljubiša M.
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8565
AB  - The subject of this study was a mid-term evaluation of cardiovascular, respiratory and total non-accidental mortalities attributed to exposure to PM 10 , O 3 , NO 2 and SO 2 in the cities of Belgrade, Novi Sad and Nis, representing about 25% of the population of Serbia. The analysis was performed using AirQ+ modelling, by linking annual baseline mortality rates and daily pollutant exposure levels in 2011–2015 based on the cause-specific concentration–response functions. Estimated shares of annual mortality attributed to these pollutants, thanks to harmonizing of assessment methodologies, may stand next to and be compared with results obtained in previously conducted studies. The obtained premature deaths estimated within 95% confidence interval (in parentheses) and attributed to PM 10 , O 3 , NO 2 and SO 2 exposure were 2013 (1344–2677), 1411 (685–2086), 831 (555–1107) and 443 (333–530), respectively. Total non-accidental mortalities due to O 3 and NO 2 exposure were in the range of findings for other regions, while mortalities attributed to PM 10 were higher. It was also found that cardiovascular mortality caused by these four pollutants was higher than respiratory mortality. Based on our results, efficient implementation of abatement strategies that would reduce PM 10 , O 3 and SO 2 concentrations to daily air quality limit values set by the World Health Organization could respectively prevent, in the three cities together, about 233 (156–310), 40 (19–59) and 71 (53–85) premature deaths per year. © 2019, Islamic Azad University (IAU).
T2  - International Journal of Environmental Science and Technology
T1  - Evaluation of mortality attributed to air pollution in the three most populated cities in Serbia
VL  - 16
IS  - 11
SP  - 7059
EP  - 7070
DO  - 10.1007/s13762-019-02384-6
ER  - 

@article{
author = "Todorović, Marija N. and Radenković, Mirjana and Rajšić, Slavica F. and Ignjatović, Ljubiša M.",
year = "2019",
abstract = "The subject of this study was a mid-term evaluation of cardiovascular, respiratory and total non-accidental mortalities attributed to exposure to PM 10 , O 3 , NO 2 and SO 2 in the cities of Belgrade, Novi Sad and Nis, representing about 25% of the population of Serbia. The analysis was performed using AirQ+ modelling, by linking annual baseline mortality rates and daily pollutant exposure levels in 2011–2015 based on the cause-specific concentration–response functions. Estimated shares of annual mortality attributed to these pollutants, thanks to harmonizing of assessment methodologies, may stand next to and be compared with results obtained in previously conducted studies. The obtained premature deaths estimated within 95% confidence interval (in parentheses) and attributed to PM 10 , O 3 , NO 2 and SO 2 exposure were 2013 (1344–2677), 1411 (685–2086), 831 (555–1107) and 443 (333–530), respectively. Total non-accidental mortalities due to O 3 and NO 2 exposure were in the range of findings for other regions, while mortalities attributed to PM 10 were higher. It was also found that cardiovascular mortality caused by these four pollutants was higher than respiratory mortality. Based on our results, efficient implementation of abatement strategies that would reduce PM 10 , O 3 and SO 2 concentrations to daily air quality limit values set by the World Health Organization could respectively prevent, in the three cities together, about 233 (156–310), 40 (19–59) and 71 (53–85) premature deaths per year. © 2019, Islamic Azad University (IAU).",
journal = "International Journal of Environmental Science and Technology",
title = "Evaluation of mortality attributed to air pollution in the three most populated cities in Serbia",
volume = "16",
number = "11",
pages = "7059-7070",
doi = "10.1007/s13762-019-02384-6"
}

Todorović, M. N., Radenković, M., Rajšić, S. F.,& Ignjatović, L. M.. (2019). Evaluation of mortality attributed to air pollution in the three most populated cities in Serbia. in International Journal of Environmental Science and Technology, 16(11), 7059-7070.
https://doi.org/10.1007/s13762-019-02384-6

Todorović MN, Radenković M, Rajšić SF, Ignjatović LM. Evaluation of mortality attributed to air pollution in the three most populated cities in Serbia. in International Journal of Environmental Science and Technology. 2019;16(11):7059-7070.
doi:10.1007/s13762-019-02384-6 .

Todorović, Marija N., Radenković, Mirjana, Rajšić, Slavica F., Ignjatović, Ljubiša M., "Evaluation of mortality attributed to air pollution in the three most populated cities in Serbia" in International Journal of Environmental Science and Technology, 16, no. 11 (2019):7059-7070,
https://doi.org/10.1007/s13762-019-02384-6 . .

TY  - JOUR
AU  - Dimitrijević, Aleksandra
AU  - Ignjatović, Ljubiša M.
AU  - Tot, Aleksandar
AU  - Vraneš, Milan
AU  - Zec, Nebojša
AU  - Gadžurić, Slobodan
AU  - Trtić-Petrović, Tatjana M.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1776
AB  - In this paper we report a simultaneous one-step extraction of five pesticides (acetamiprid, imidaclopride, simazine, linuron and tebufenozide) of different polarity using aqueous biphasic system based on 1-butyl-3(methyl or ethyl) substituted imidazolium or pyrrolidinium ionic liquids with bromide or dicyanamide anion and potassium carbonate as a salting-out agent. Experimentally data obtained for the ternary system (ionic liquid + K2CO3 + H2O) were fitted and correlated by Merchuk equation with satisfactory high correlation factor. The effect of the cation alkyl chain length and the variation of anions of the ionic liquid on the aqueous biphasic system formation and the efficiency of pesticide extraction were investigated. Complete extraction of all studied pesticides was obtained applying aqueous biphasic system based on 1-butyl-3-ethyl imidazolium dicyanamide. It was shown that simultaneous extraction of the different polarity pesticides is achieved in a single-step procedure applying properly tailored ionic liquids in the aqueous biphasic system formulation. In order to explain excellent extraction of the polar pesticides in the studied aqueous biphasic systems, molecular dynamics was applied and the binding energies and non-covalent interactions were calculated. It was found that 1-butyl-3-ethyl imidazolium dicyanamide achieves the strongest interactions with the polar pesticides (acetamiprid and imidaclopride) leading to the highest partition coefficients. It was shown that combination of experimental and computational approach can be successfully applied for the selection and design of suitable ionic liquids for efficient extraction of various polarity pesticides using simple aqueous biphasic ionic liquid based systems. (C) 2017 Elsevier B.V. All rights reserved.
T2  - Journal of Molecular Liquids
T1  - Simultaneous extraction of pesticides of different polarity applying aqueous biphasic systems based on ionic liquids
VL  - 243
SP  - 646
EP  - 653
DO  - 10.1016/j.molliq.2017.08.077
ER  - 

@article{
author = "Dimitrijević, Aleksandra and Ignjatović, Ljubiša M. and Tot, Aleksandar and Vraneš, Milan and Zec, Nebojša and Gadžurić, Slobodan and Trtić-Petrović, Tatjana M.",
year = "2017",
abstract = "In this paper we report a simultaneous one-step extraction of five pesticides (acetamiprid, imidaclopride, simazine, linuron and tebufenozide) of different polarity using aqueous biphasic system based on 1-butyl-3(methyl or ethyl) substituted imidazolium or pyrrolidinium ionic liquids with bromide or dicyanamide anion and potassium carbonate as a salting-out agent. Experimentally data obtained for the ternary system (ionic liquid + K2CO3 + H2O) were fitted and correlated by Merchuk equation with satisfactory high correlation factor. The effect of the cation alkyl chain length and the variation of anions of the ionic liquid on the aqueous biphasic system formation and the efficiency of pesticide extraction were investigated. Complete extraction of all studied pesticides was obtained applying aqueous biphasic system based on 1-butyl-3-ethyl imidazolium dicyanamide. It was shown that simultaneous extraction of the different polarity pesticides is achieved in a single-step procedure applying properly tailored ionic liquids in the aqueous biphasic system formulation. In order to explain excellent extraction of the polar pesticides in the studied aqueous biphasic systems, molecular dynamics was applied and the binding energies and non-covalent interactions were calculated. It was found that 1-butyl-3-ethyl imidazolium dicyanamide achieves the strongest interactions with the polar pesticides (acetamiprid and imidaclopride) leading to the highest partition coefficients. It was shown that combination of experimental and computational approach can be successfully applied for the selection and design of suitable ionic liquids for efficient extraction of various polarity pesticides using simple aqueous biphasic ionic liquid based systems. (C) 2017 Elsevier B.V. All rights reserved.",
journal = "Journal of Molecular Liquids",
title = "Simultaneous extraction of pesticides of different polarity applying aqueous biphasic systems based on ionic liquids",
volume = "243",
pages = "646-653",
doi = "10.1016/j.molliq.2017.08.077"
}

Dimitrijević, A., Ignjatović, L. M., Tot, A., Vraneš, M., Zec, N., Gadžurić, S.,& Trtić-Petrović, T. M.. (2017). Simultaneous extraction of pesticides of different polarity applying aqueous biphasic systems based on ionic liquids. in Journal of Molecular Liquids, 243, 646-653.
https://doi.org/10.1016/j.molliq.2017.08.077

Dimitrijević A, Ignjatović LM, Tot A, Vraneš M, Zec N, Gadžurić S, Trtić-Petrović TM. Simultaneous extraction of pesticides of different polarity applying aqueous biphasic systems based on ionic liquids. in Journal of Molecular Liquids. 2017;243:646-653.
doi:10.1016/j.molliq.2017.08.077 .

Dimitrijević, Aleksandra, Ignjatović, Ljubiša M., Tot, Aleksandar, Vraneš, Milan, Zec, Nebojša, Gadžurić, Slobodan, Trtić-Petrović, Tatjana M., "Simultaneous extraction of pesticides of different polarity applying aqueous biphasic systems based on ionic liquids" in Journal of Molecular Liquids, 243 (2017):646-653,
https://doi.org/10.1016/j.molliq.2017.08.077 . .

TY  - JOUR
AU  - Savić-Biserčić, Marjetka
AU  - Pezo, Lato
AU  - Ignjatović, Ivana Sredović
AU  - Ignjatović, Ljubiša M.
AU  - Savić, Andrija B.
AU  - Jovanović, Uroš D.
AU  - Andrić, Velibor
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1220
AB  - Two mechanical extraction techniques were used for the extraction of environmentaly interesting components of coal fly ash: shaking, during which the extraction process lasted from 6 up to 24 h, and sonication that lasted from 15 up to 60 min, using water as extractant. The concentration of anions in fly ash extracts was determined by ion chromatography, while atomic absorption spectrometry was used for determination of: As, Pb, Cd, Ni, Cr, Zn, Cu, Fe, Mn and Al. The ultrasonication yielded slightly higher amounts of extracted anions as well as Pb, Al, Mn and Fe cations, while shaking-assisted extraction was more efficient for the Cr, As, Zn and Ni ions. The changes in pH value, particle size distribution within colloid solution, zeta potential and conductivity during ultrasound-assisted extraction were measured in order to explain changes that occur on the surface of fly ash particles contacting water and different processes (adsorption, ion exchange and flocculation) that develop under natural conditions. Principal Component Analysis was used for assessing the effect of observed process parameters. It is essential to evaluate quantity of these elements leachable from coal fly ash into the surface waters in natural conditions in order to prevent contamination of the environment.
T2  - Journal of the Serbian Chemical Society
T1  - Ultrasound and shacking-assisted water-leaching of anions and cations from fly ash
VL  - 81
IS  - 7
SP  - 813
EP  - 827
DO  - 10.2298/JSC151222027B
ER  - 

@article{
author = "Savić-Biserčić, Marjetka and Pezo, Lato and Ignjatović, Ivana Sredović and Ignjatović, Ljubiša M. and Savić, Andrija B. and Jovanović, Uroš D. and Andrić, Velibor",
year = "2016",
abstract = "Two mechanical extraction techniques were used for the extraction of environmentaly interesting components of coal fly ash: shaking, during which the extraction process lasted from 6 up to 24 h, and sonication that lasted from 15 up to 60 min, using water as extractant. The concentration of anions in fly ash extracts was determined by ion chromatography, while atomic absorption spectrometry was used for determination of: As, Pb, Cd, Ni, Cr, Zn, Cu, Fe, Mn and Al. The ultrasonication yielded slightly higher amounts of extracted anions as well as Pb, Al, Mn and Fe cations, while shaking-assisted extraction was more efficient for the Cr, As, Zn and Ni ions. The changes in pH value, particle size distribution within colloid solution, zeta potential and conductivity during ultrasound-assisted extraction were measured in order to explain changes that occur on the surface of fly ash particles contacting water and different processes (adsorption, ion exchange and flocculation) that develop under natural conditions. Principal Component Analysis was used for assessing the effect of observed process parameters. It is essential to evaluate quantity of these elements leachable from coal fly ash into the surface waters in natural conditions in order to prevent contamination of the environment.",
journal = "Journal of the Serbian Chemical Society",
title = "Ultrasound and shacking-assisted water-leaching of anions and cations from fly ash",
volume = "81",
number = "7",
pages = "813-827",
doi = "10.2298/JSC151222027B"
}

Savić-Biserčić, M., Pezo, L., Ignjatović, I. S., Ignjatović, L. M., Savić, A. B., Jovanović, U. D.,& Andrić, V.. (2016). Ultrasound and shacking-assisted water-leaching of anions and cations from fly ash. in Journal of the Serbian Chemical Society, 81(7), 813-827.
https://doi.org/10.2298/JSC151222027B

Savić-Biserčić M, Pezo L, Ignjatović IS, Ignjatović LM, Savić AB, Jovanović UD, Andrić V. Ultrasound and shacking-assisted water-leaching of anions and cations from fly ash. in Journal of the Serbian Chemical Society. 2016;81(7):813-827.
doi:10.2298/JSC151222027B .

Savić-Biserčić, Marjetka, Pezo, Lato, Ignjatović, Ivana Sredović, Ignjatović, Ljubiša M., Savić, Andrija B., Jovanović, Uroš D., Andrić, Velibor, "Ultrasound and shacking-assisted water-leaching of anions and cations from fly ash" in Journal of the Serbian Chemical Society, 81, no. 7 (2016):813-827,
https://doi.org/10.2298/JSC151222027B . .

TY  - JOUR
AU  - Ignjatović, Ivana D. Sredović
AU  - Onjia, Antonije E.
AU  - Ignjatović, Ljubiša M.
AU  - Todorović, Žaklina
AU  - Rajaković, Ljubinka V.
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/713
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.
T2  - Analytical Letters
T1  - Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography
VL  - 48
IS  - 16
SP  - 2597
EP  - 2612
DO  - 10.1080/00032719.2015.1041029
ER  - 

@article{
author = "Ignjatović, Ivana D. Sredović and Onjia, Antonije E. and Ignjatović, Ljubiša M. and Todorović, Žaklina 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.",
journal = "Analytical Letters",
title = "Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography",
volume = "48",
number = "16",
pages = "2597-2612",
doi = "10.1080/00032719.2015.1041029"
}

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

Ignjatović IDS, Onjia AE, Ignjatović LM, Todorović Ž, 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 .

Ignjatović, Ivana D. Sredović, Onjia, Antonije E., Ignjatović, Ljubiša M., Todorović, Žaklina, 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  - Janković, Marija M.
AU  - Janković, Bojan Ž.
AU  - Todorović, Dragana
AU  - Ignjatović, Ljubiša M.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4796
AB  - Tritium activity concentration were monitored in monthly precipitation at five locations in Serbia (Meteorological Station of Belgrade at Zeleno Brdo, Vinca Institute of Nuclear Sciences, Smederevska Palanka, Kraljevo and Nis) over 2005, using electrolytic enrichment and liquid scintillation counting. The obtained concentrations ranged from 3.36 to 127.02 TU. The activity values obtained in samples collected at Zeleno Brdo were lower or close to the minimum detectable activity (MDA), which has a value of 3.36 TU. Significantly higher tritium levels were obtained in samples collected in Vinca Institute of Nuclear Sciences compared with samples from the other investigated locations. Amount of precipitation were also recorded. A good linear correlation (r = 0.75) for Zeleno Brdo and VINS between their tritium activity was obtained. It was found that the value of the symmetrical index n (which indicates the magnitude of tritium content changes with time (months) through its second derivative) is the highest for Vinca Institute of Nuclear Sciences compared to other locations, which is in accordance with the fact that the highest concentrations of tritium were obtained in the samples from the cited place.
T2  - Journal of Environmental Science and Health. Part A: Toxic Hazardous Substances and Environmental Engineering
T1  - Tritium concentration analysis in atmospheric precipitation in Serbia
VL  - 47
IS  - 5
SP  - 669
EP  - 674
DO  - 10.1080/10934529.2012.660039
ER  - 

@article{
author = "Janković, Marija M. and Janković, Bojan Ž. and Todorović, Dragana and Ignjatović, Ljubiša M.",
year = "2012",
abstract = "Tritium activity concentration were monitored in monthly precipitation at five locations in Serbia (Meteorological Station of Belgrade at Zeleno Brdo, Vinca Institute of Nuclear Sciences, Smederevska Palanka, Kraljevo and Nis) over 2005, using electrolytic enrichment and liquid scintillation counting. The obtained concentrations ranged from 3.36 to 127.02 TU. The activity values obtained in samples collected at Zeleno Brdo were lower or close to the minimum detectable activity (MDA), which has a value of 3.36 TU. Significantly higher tritium levels were obtained in samples collected in Vinca Institute of Nuclear Sciences compared with samples from the other investigated locations. Amount of precipitation were also recorded. A good linear correlation (r = 0.75) for Zeleno Brdo and VINS between their tritium activity was obtained. It was found that the value of the symmetrical index n (which indicates the magnitude of tritium content changes with time (months) through its second derivative) is the highest for Vinca Institute of Nuclear Sciences compared to other locations, which is in accordance with the fact that the highest concentrations of tritium were obtained in the samples from the cited place.",
journal = "Journal of Environmental Science and Health. Part A: Toxic Hazardous Substances and Environmental Engineering",
title = "Tritium concentration analysis in atmospheric precipitation in Serbia",
volume = "47",
number = "5",
pages = "669-674",
doi = "10.1080/10934529.2012.660039"
}

Janković, M. M., Janković, B. Ž., Todorović, D.,& Ignjatović, L. M.. (2012). Tritium concentration analysis in atmospheric precipitation in Serbia. in Journal of Environmental Science and Health. Part A: Toxic Hazardous Substances and Environmental Engineering, 47(5), 669-674.
https://doi.org/10.1080/10934529.2012.660039

Janković MM, Janković BŽ, Todorović D, Ignjatović LM. Tritium concentration analysis in atmospheric precipitation in Serbia. in Journal of Environmental Science and Health. Part A: Toxic Hazardous Substances and Environmental Engineering. 2012;47(5):669-674.
doi:10.1080/10934529.2012.660039 .

Janković, Marija M., Janković, Bojan Ž., Todorović, Dragana, Ignjatović, Ljubiša M., "Tritium concentration analysis in atmospheric precipitation in Serbia" in Journal of Environmental Science and Health. Part A: Toxic Hazardous Substances and Environmental Engineering, 47, no. 5 (2012):669-674,
https://doi.org/10.1080/10934529.2012.660039 . .

TY  - JOUR
AU  - Joksić, Jasminka D.
AU  - Jovašević-Stojanović, Milena
AU  - Bartonova, Alena
AU  - Radenković, Mirjana
AU  - Yttri, Karl-Espen
AU  - Matić-Besarabić, Snežana
AU  - Ignjatović, Ljubiša M.
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3844
AB  - Within this study, attempts were made to characterize the coarse and fine particulate aerosol fractions in urban area of Belgrade and define the inorganic chemical composition of the aerosol fractions. For this purpose, daily deposits Of PM(10), PM(2.5) and PM(1) aerosol fractions were collected during spring and autumn sampling periods in 2007 and analyzed for the PM mass concentrations, trace elements and secondary ions. The results obtained in the two campaigns showed average daily mass concentrations of 37 and 44 mu g/m(3) for PM(10), 22 and 23 mu g/m(3) for PM(2.5) and 15 and 17 mu g/m(3) for the finest particulate matter fraction PM(1) with the maximums exceeding the limit values set by the EU air quality regulations. A correlation with the gas-phase ambient air pollutants SO(2), NO(2) and O(3) was found and is discussed. The concentrations of trace elements (Mg, Al, K, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Mo, Cd, Sb, Ba, Tl, Pb and Th) and secondary ions (NO(3)(-), SO(4)(2-), NH(4)(+), K(+), Ca(2+) and Na(+)) determined in the PM(10), PM(2.5) and PM(1) aerosol fractions showed levels and distributions indicating soil and traffic-related sources as the main pollution sources. This study was conducted as the first step of PM assessment in order to point out main air pollution sources and suggest a remedy strategy specific for this region.
T2  - Journal of the Serbian Chemical Society
T1  - Physical and chemical characterization of the particulate matter suspended in aerosols from the urban area of Belgrade
VL  - 74
IS  - 11
SP  - 1319
EP  - 1333
DO  - 10.2298/JSC0911319J
ER  - 

@article{
author = "Joksić, Jasminka D. and Jovašević-Stojanović, Milena and Bartonova, Alena and Radenković, Mirjana and Yttri, Karl-Espen and Matić-Besarabić, Snežana and Ignjatović, Ljubiša M.",
year = "2009",
abstract = "Within this study, attempts were made to characterize the coarse and fine particulate aerosol fractions in urban area of Belgrade and define the inorganic chemical composition of the aerosol fractions. For this purpose, daily deposits Of PM(10), PM(2.5) and PM(1) aerosol fractions were collected during spring and autumn sampling periods in 2007 and analyzed for the PM mass concentrations, trace elements and secondary ions. The results obtained in the two campaigns showed average daily mass concentrations of 37 and 44 mu g/m(3) for PM(10), 22 and 23 mu g/m(3) for PM(2.5) and 15 and 17 mu g/m(3) for the finest particulate matter fraction PM(1) with the maximums exceeding the limit values set by the EU air quality regulations. A correlation with the gas-phase ambient air pollutants SO(2), NO(2) and O(3) was found and is discussed. The concentrations of trace elements (Mg, Al, K, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Se, Mo, Cd, Sb, Ba, Tl, Pb and Th) and secondary ions (NO(3)(-), SO(4)(2-), NH(4)(+), K(+), Ca(2+) and Na(+)) determined in the PM(10), PM(2.5) and PM(1) aerosol fractions showed levels and distributions indicating soil and traffic-related sources as the main pollution sources. This study was conducted as the first step of PM assessment in order to point out main air pollution sources and suggest a remedy strategy specific for this region.",
journal = "Journal of the Serbian Chemical Society",
title = "Physical and chemical characterization of the particulate matter suspended in aerosols from the urban area of Belgrade",
volume = "74",
number = "11",
pages = "1319-1333",
doi = "10.2298/JSC0911319J"
}

Joksić, J. D., Jovašević-Stojanović, M., Bartonova, A., Radenković, M., Yttri, K., Matić-Besarabić, S.,& Ignjatović, L. M.. (2009). Physical and chemical characterization of the particulate matter suspended in aerosols from the urban area of Belgrade. in Journal of the Serbian Chemical Society, 74(11), 1319-1333.
https://doi.org/10.2298/JSC0911319J

Joksić JD, Jovašević-Stojanović M, Bartonova A, Radenković M, Yttri K, Matić-Besarabić S, Ignjatović LM. Physical and chemical characterization of the particulate matter suspended in aerosols from the urban area of Belgrade. in Journal of the Serbian Chemical Society. 2009;74(11):1319-1333.
doi:10.2298/JSC0911319J .

Joksić, Jasminka D., Jovašević-Stojanović, Milena, Bartonova, Alena, Radenković, Mirjana, Yttri, Karl-Espen, Matić-Besarabić, Snežana, Ignjatović, Ljubiša M., "Physical and chemical characterization of the particulate matter suspended in aerosols from the urban area of Belgrade" in Journal of the Serbian Chemical Society, 74, no. 11 (2009):1319-1333,
https://doi.org/10.2298/JSC0911319J . .

TY  - CONF
AU  - Radak, Bojan
AU  - Zuic, Aleksandra
AU  - Ignjatović, Ljubiša M.
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6412
C3  - Abstracts of Papers of the American Chemical Society
T1  - ENVR 52-Advanced air quality indexing in a transition economy city: The Belgrade example
VL  - 238
UR  - https://hdl.handle.net/21.15107/rcub_vinar_6412
ER  - 

@conference{
author = "Radak, Bojan and Zuic, Aleksandra and Ignjatović, Ljubiša M.",
year = "2009",
journal = "Abstracts of Papers of the American Chemical Society",
title = "ENVR 52-Advanced air quality indexing in a transition economy city: The Belgrade example",
volume = "238",
url = "https://hdl.handle.net/21.15107/rcub_vinar_6412"
}

Radak, B., Zuic, A.,& Ignjatović, L. M.. (2009). ENVR 52-Advanced air quality indexing in a transition economy city: The Belgrade example. in Abstracts of Papers of the American Chemical Society, 238.
https://hdl.handle.net/21.15107/rcub_vinar_6412

Radak B, Zuic A, Ignjatović LM. ENVR 52-Advanced air quality indexing in a transition economy city: The Belgrade example. in Abstracts of Papers of the American Chemical Society. 2009;238.
https://hdl.handle.net/21.15107/rcub_vinar_6412 .

Radak, Bojan, Zuic, Aleksandra, Ignjatović, Ljubiša M., "ENVR 52-Advanced air quality indexing in a transition economy city: The Belgrade example" in Abstracts of Papers of the American Chemical Society, 238 (2009),
https://hdl.handle.net/21.15107/rcub_vinar_6412 .

TY  - JOUR
AU  - Kumrić, Ksenija
AU  - Trtić-Petrović, Tatjana M.
AU  - Ignjatović, Ljubiša M.
AU  - Čomor, Jožef J.
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3348
AB  - Lutetium has been determined by differential pulse anodic stripping voltammetry in an acidic solution containing Zn-EDTA. Lutetium (III) ions liberated zinc (II), which was preconcentrated on a hanging mercury drop electrode and stripped anodically, resulting in peak current linearly dependent on lutetium (III) concentration. Less than 0.4 ng mL(-1) lutetium could be detected after a 2 min deposition.
T2  - Central European Journal of Chemistry
T1  - Indirect determination of lutetium by differential pulse anodic stripping voltammetry at a hanging mercury drop electrode
VL  - 6
IS  - 1
SP  - 65
EP  - 69
DO  - 10.2478/s11532-007-0055-3
ER  - 

@article{
author = "Kumrić, Ksenija and Trtić-Petrović, Tatjana M. and Ignjatović, Ljubiša M. and Čomor, Jožef J.",
year = "2008",
abstract = "Lutetium has been determined by differential pulse anodic stripping voltammetry in an acidic solution containing Zn-EDTA. Lutetium (III) ions liberated zinc (II), which was preconcentrated on a hanging mercury drop electrode and stripped anodically, resulting in peak current linearly dependent on lutetium (III) concentration. Less than 0.4 ng mL(-1) lutetium could be detected after a 2 min deposition.",
journal = "Central European Journal of Chemistry",
title = "Indirect determination of lutetium by differential pulse anodic stripping voltammetry at a hanging mercury drop electrode",
volume = "6",
number = "1",
pages = "65-69",
doi = "10.2478/s11532-007-0055-3"
}

Kumrić, K., Trtić-Petrović, T. M., Ignjatović, L. M.,& Čomor, J. J.. (2008). Indirect determination of lutetium by differential pulse anodic stripping voltammetry at a hanging mercury drop electrode. in Central European Journal of Chemistry, 6(1), 65-69.
https://doi.org/10.2478/s11532-007-0055-3

Kumrić K, Trtić-Petrović TM, Ignjatović LM, Čomor JJ. Indirect determination of lutetium by differential pulse anodic stripping voltammetry at a hanging mercury drop electrode. in Central European Journal of Chemistry. 2008;6(1):65-69.
doi:10.2478/s11532-007-0055-3 .

Kumrić, Ksenija, Trtić-Petrović, Tatjana M., Ignjatović, Ljubiša M., Čomor, Jožef J., "Indirect determination of lutetium by differential pulse anodic stripping voltammetry at a hanging mercury drop electrode" in Central European Journal of Chemistry, 6, no. 1 (2008):65-69,
https://doi.org/10.2478/s11532-007-0055-3 . .