TY  - JOUR
AU  - Lalović, Bojana
AU  - Durkić, Tatjana
AU  - Vukčević, Marija
AU  - Jankovic-Častvan, Ivona
AU  - Kalijadis, Ana
AU  - Laušević, Zoran
AU  - Laušević, Mila D.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1707
AB  - In this paper, pristine and chemically treated multi-walled carbon nanotubes (MWCNTs) were employed as solid-phase extraction sorbents for the isolation and enrichment of multi-class pharmaceuticals from the surface water and groundwater, prior to liquid chromatography-tandem mass spectrometry analysis. Thirteen pharmaceuticals that belong to different therapeutical classes (erythromycin, azithromycin, sulfamethoxazole, diazepam, lorazepam, carbamazepine, metoprolol, bisoprolol, enalapril, cilazapril, simvastatin, clopidogrel, diclofenac) and two metabolites of metamizole (4-acetylaminoantipyrine and 4-formylaminoantipyrine) were selected for this study. The influence of chemical treatment on MWCNT surface characteristics and extraction efficiency was studied, and it was shown that HCl treatment of MWCNT leads to a decrease in the amount of surface oxygen groups and at the same time favorably affects the efficiency toward extraction of selected pharmaceuticals. After the optimization of the SPE procedure, the following conditions were chosen: 50 mg of HCl-treated MCWNT as a sorbent, 100 mL of water sample at pH 6, and 15 mL of the methanol-dichloromethane mixture (1:1, v/v) as eluent. Under optimal conditions, high recoveries (79-119%), as well as low detection (0.2 to 103 ng L-1) and quantitation (0.5-345 ng L-1) limits, were obtained. The optimized method was applied to the analysis of five surface water and two groundwater samples, and three pharmaceuticals were detected, the antiepileptic drug carbamazepine and two metabolites of antipyretic metamizole.
T2  - Environmental Science and Pollution Research
T1  - Solid-phase extraction of multi-class pharmaceuticals from environmental water samples onto modified multi-walled carbon nanotubes followed by LC-MS/MS
VL  - 24
IS  - 25
SP  - 20784
EP  - 20793
DO  - 10.1007/s11356-017-9748-0
ER  - 

@article{
author = "Lalović, Bojana and Durkić, Tatjana and Vukčević, Marija and Jankovic-Častvan, Ivona and Kalijadis, Ana and Laušević, Zoran and Laušević, Mila D.",
year = "2017",
abstract = "In this paper, pristine and chemically treated multi-walled carbon nanotubes (MWCNTs) were employed as solid-phase extraction sorbents for the isolation and enrichment of multi-class pharmaceuticals from the surface water and groundwater, prior to liquid chromatography-tandem mass spectrometry analysis. Thirteen pharmaceuticals that belong to different therapeutical classes (erythromycin, azithromycin, sulfamethoxazole, diazepam, lorazepam, carbamazepine, metoprolol, bisoprolol, enalapril, cilazapril, simvastatin, clopidogrel, diclofenac) and two metabolites of metamizole (4-acetylaminoantipyrine and 4-formylaminoantipyrine) were selected for this study. The influence of chemical treatment on MWCNT surface characteristics and extraction efficiency was studied, and it was shown that HCl treatment of MWCNT leads to a decrease in the amount of surface oxygen groups and at the same time favorably affects the efficiency toward extraction of selected pharmaceuticals. After the optimization of the SPE procedure, the following conditions were chosen: 50 mg of HCl-treated MCWNT as a sorbent, 100 mL of water sample at pH 6, and 15 mL of the methanol-dichloromethane mixture (1:1, v/v) as eluent. Under optimal conditions, high recoveries (79-119%), as well as low detection (0.2 to 103 ng L-1) and quantitation (0.5-345 ng L-1) limits, were obtained. The optimized method was applied to the analysis of five surface water and two groundwater samples, and three pharmaceuticals were detected, the antiepileptic drug carbamazepine and two metabolites of antipyretic metamizole.",
journal = "Environmental Science and Pollution Research",
title = "Solid-phase extraction of multi-class pharmaceuticals from environmental water samples onto modified multi-walled carbon nanotubes followed by LC-MS/MS",
volume = "24",
number = "25",
pages = "20784-20793",
doi = "10.1007/s11356-017-9748-0"
}

Lalović, B., Durkić, T., Vukčević, M., Jankovic-Častvan, I., Kalijadis, A., Laušević, Z.,& Laušević, M. D.. (2017). Solid-phase extraction of multi-class pharmaceuticals from environmental water samples onto modified multi-walled carbon nanotubes followed by LC-MS/MS. in Environmental Science and Pollution Research, 24(25), 20784-20793.
https://doi.org/10.1007/s11356-017-9748-0

Lalović B, Durkić T, Vukčević M, Jankovic-Častvan I, Kalijadis A, Laušević Z, Laušević MD. Solid-phase extraction of multi-class pharmaceuticals from environmental water samples onto modified multi-walled carbon nanotubes followed by LC-MS/MS. in Environmental Science and Pollution Research. 2017;24(25):20784-20793.
doi:10.1007/s11356-017-9748-0 .

Lalović, Bojana, Durkić, Tatjana, Vukčević, Marija, Jankovic-Častvan, Ivona, Kalijadis, Ana, Laušević, Zoran, Laušević, Mila D., "Solid-phase extraction of multi-class pharmaceuticals from environmental water samples onto modified multi-walled carbon nanotubes followed by LC-MS/MS" in Environmental Science and Pollution Research, 24, no. 25 (2017):20784-20793,
https://doi.org/10.1007/s11356-017-9748-0 . .

TY  - JOUR
AU  - Vukčević, Marija M.
AU  - Pejić, Biljana M.
AU  - Pajić-Lijaković, Ivana
AU  - Kalijadis, Ana
AU  - Kostić, Mirjana M.
AU  - Laušević, Zoran
AU  - Laušević, Mila D.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1897
AB  - Waste hemp (Cannabis sativa) fibers were used as sustainable and renewable raw materials for production of low-cost biocarbon sorbent for heavy metals removal. Carbon precursors of different chemical composition were obtained by oxidative and alkaline treatments of hemp fibers. Influence of lignocellulosic precursor chemical composition on hemp fibers-based biocarbon (HFB) characteristics was examined by BET surface area measurement, scanning electron microscopy and mass titration. It was found that lignin content and polymorphic transformation of cellulose increase the SBET of microporous HFBs, while hemicelluloses induce more homogeneous distribution of adsorption active sites. Heavy metal ions adsorption onto HFBs is primarily influenced by the amount of surface oxygen groups, while specific surface area plays a secondary role. Equilibrium data obtained for lead ions adsorption were analyzed by different nonlinear adsorption isotherms, and the best fitting model was chosen using standard deviation and Akaike information criterion (AIC(C)). The maximum adsorption capacities of HFBs ranged from 103.1 to 116.3 mg Pb/g. Thermodynamic parameters showed that Pb2+ adsorption onto HFBs is a spontaneous and complex endothermic process, suggesting the coexistence of physisorption and chemisorption mechanisms.
T2  - Journal of the Serbian Chemical Society
T1  - Influence of the precursor chemical composition on heavy metal adsorption properties of hemp (Cannabis Sativa) fibers based biocarbon
VL  - 82
IS  - 12
SP  - 1417
EP  - 1431
DO  - 10.2298/JSC170310080V
ER  - 

@article{
author = "Vukčević, Marija M. and Pejić, Biljana M. and Pajić-Lijaković, Ivana and Kalijadis, Ana and Kostić, Mirjana M. and Laušević, Zoran and Laušević, Mila D.",
year = "2017",
abstract = "Waste hemp (Cannabis sativa) fibers were used as sustainable and renewable raw materials for production of low-cost biocarbon sorbent for heavy metals removal. Carbon precursors of different chemical composition were obtained by oxidative and alkaline treatments of hemp fibers. Influence of lignocellulosic precursor chemical composition on hemp fibers-based biocarbon (HFB) characteristics was examined by BET surface area measurement, scanning electron microscopy and mass titration. It was found that lignin content and polymorphic transformation of cellulose increase the SBET of microporous HFBs, while hemicelluloses induce more homogeneous distribution of adsorption active sites. Heavy metal ions adsorption onto HFBs is primarily influenced by the amount of surface oxygen groups, while specific surface area plays a secondary role. Equilibrium data obtained for lead ions adsorption were analyzed by different nonlinear adsorption isotherms, and the best fitting model was chosen using standard deviation and Akaike information criterion (AIC(C)). The maximum adsorption capacities of HFBs ranged from 103.1 to 116.3 mg Pb/g. Thermodynamic parameters showed that Pb2+ adsorption onto HFBs is a spontaneous and complex endothermic process, suggesting the coexistence of physisorption and chemisorption mechanisms.",
journal = "Journal of the Serbian Chemical Society",
title = "Influence of the precursor chemical composition on heavy metal adsorption properties of hemp (Cannabis Sativa) fibers based biocarbon",
volume = "82",
number = "12",
pages = "1417-1431",
doi = "10.2298/JSC170310080V"
}

Vukčević, M. M., Pejić, B. M., Pajić-Lijaković, I., Kalijadis, A., Kostić, M. M., Laušević, Z.,& Laušević, M. D.. (2017). Influence of the precursor chemical composition on heavy metal adsorption properties of hemp (Cannabis Sativa) fibers based biocarbon. in Journal of the Serbian Chemical Society, 82(12), 1417-1431.
https://doi.org/10.2298/JSC170310080V

Vukčević MM, Pejić BM, Pajić-Lijaković I, Kalijadis A, Kostić MM, Laušević Z, Laušević MD. Influence of the precursor chemical composition on heavy metal adsorption properties of hemp (Cannabis Sativa) fibers based biocarbon. in Journal of the Serbian Chemical Society. 2017;82(12):1417-1431.
doi:10.2298/JSC170310080V .

Vukčević, Marija M., Pejić, Biljana M., Pajić-Lijaković, Ivana, Kalijadis, Ana, Kostić, Mirjana M., Laušević, Zoran, Laušević, Mila D., "Influence of the precursor chemical composition on heavy metal adsorption properties of hemp (Cannabis Sativa) fibers based biocarbon" in Journal of the Serbian Chemical Society, 82, no. 12 (2017):1417-1431,
https://doi.org/10.2298/JSC170310080V . .

TY  - JOUR
AU  - Vukčević, Marija M.
AU  - Kalijadis, Ana
AU  - Vasiljevic, Tatjana M.
AU  - Babić, Biljana M.
AU  - Laušević, Zoran
AU  - Laušević, Mila D.
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/621
AB  - The main objective of this work was to find optimal production parameters for the preparation of activated hemp fibers (ACh) with good adsorption properties toward pesticides. In order to examine the role of manufacturing parameters on ACh surface characteristics, activation process of carbonized hemp fibers was investigated by temperature programmed reaction and evolved gaseous products of activation were monitored by mass spectrometry. ACh samples were characterized by BET surface area, scanning electron microscopy and temperature-programmed desorption. KOH activation induces the reduction of oxygen groups existing on the carbonized hemp fiber surface and the formation of the more stable, predominantly anhydride groups, while porosity development correlates with both H-2 and CO, evolved during the activation, and increases with carbonization and activation temperature. Finally, the highest efficiency in pesticides removal was achieved by carbonization of waste hemp fibers and activation at 900 degrees C with KOH/carbonized material ratio of 2/1. High efficiency in pesticides removal indicates that activated hemp fibers could be successfully used as a sorbent in water purification. (C) 2015 Elsevier Inc. All rights reserved.
T2  - Microporous and Mesoporous Materials
T1  - Production of activated carbon derived from waste hemp (Cannabis sativa) fibers and its performance in pesticide adsorption
VL  - 214
SP  - 156
EP  - 165
DO  - 10.1016/j.micromeso.2015.05.012
ER  - 

@article{
author = "Vukčević, Marija M. and Kalijadis, Ana and Vasiljevic, Tatjana M. and Babić, Biljana M. and Laušević, Zoran and Laušević, Mila D.",
year = "2015",
abstract = "The main objective of this work was to find optimal production parameters for the preparation of activated hemp fibers (ACh) with good adsorption properties toward pesticides. In order to examine the role of manufacturing parameters on ACh surface characteristics, activation process of carbonized hemp fibers was investigated by temperature programmed reaction and evolved gaseous products of activation were monitored by mass spectrometry. ACh samples were characterized by BET surface area, scanning electron microscopy and temperature-programmed desorption. KOH activation induces the reduction of oxygen groups existing on the carbonized hemp fiber surface and the formation of the more stable, predominantly anhydride groups, while porosity development correlates with both H-2 and CO, evolved during the activation, and increases with carbonization and activation temperature. Finally, the highest efficiency in pesticides removal was achieved by carbonization of waste hemp fibers and activation at 900 degrees C with KOH/carbonized material ratio of 2/1. High efficiency in pesticides removal indicates that activated hemp fibers could be successfully used as a sorbent in water purification. (C) 2015 Elsevier Inc. All rights reserved.",
journal = "Microporous and Mesoporous Materials",
title = "Production of activated carbon derived from waste hemp (Cannabis sativa) fibers and its performance in pesticide adsorption",
volume = "214",
pages = "156-165",
doi = "10.1016/j.micromeso.2015.05.012"
}

Vukčević, M. M., Kalijadis, A., Vasiljevic, T. M., Babić, B. M., Laušević, Z.,& Laušević, M. D.. (2015). Production of activated carbon derived from waste hemp (Cannabis sativa) fibers and its performance in pesticide adsorption. in Microporous and Mesoporous Materials, 214, 156-165.
https://doi.org/10.1016/j.micromeso.2015.05.012

Vukčević MM, Kalijadis A, Vasiljevic TM, Babić BM, Laušević Z, Laušević MD. Production of activated carbon derived from waste hemp (Cannabis sativa) fibers and its performance in pesticide adsorption. in Microporous and Mesoporous Materials. 2015;214:156-165.
doi:10.1016/j.micromeso.2015.05.012 .

Vukčević, Marija M., Kalijadis, Ana, Vasiljevic, Tatjana M., Babić, Biljana M., Laušević, Zoran, Laušević, Mila D., "Production of activated carbon derived from waste hemp (Cannabis sativa) fibers and its performance in pesticide adsorption" in Microporous and Mesoporous Materials, 214 (2015):156-165,
https://doi.org/10.1016/j.micromeso.2015.05.012 . .

TY  - JOUR
AU  - Maletić, Marina
AU  - Vukčević, Marija
AU  - Kalijadis, Ana
AU  - Laušević, Zoran
AU  - Laušević, Mila D.
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/641
AB  - The new and simple approach for deposition of catalytically active TiO2 coating on carbon monolith (CM) carrier was presented. CM photocatalysts were impregnated with TiO2 using titanium solution and thermal treatment, and their photocatalytic activity was investigated in the process of methylene blue (MB) photodegradation. For the purpose of comparison, CM composite photocatalysts were prepared by dip-coating method, which implies binder usage. The presence of TiO2 on CM carrier was confirmed by Raman spectroscopy and scanning electron microscopy. The sorption characteristics of CM and the role of adsorption in the overall process of MB removal were evaluated through amount of surface oxygen groups obtained by temperature-programmed desorption and specific surface area determined by BET method. CM has shown good adsorption properties toward MB due to high amount of surface oxygen groups and relatively high specific surface area. It was concluded that photocatalytic activity increases with CM disc thickness due to increase of MB adsorption and amount of deposited TiO2. Good photocatalytic activity achieved for samples obtained by thermal treatment is the result of better accessibility of MB solution to the TiO2 particles induced by binder absence.
T2  - Advances in Materials Science and Engineering
T1  - Photocatalytic Performance of Carbon Monolith/TiO2 Composite
DO  - 10.1155/2015/803492
ER  - 

@article{
author = "Maletić, Marina and Vukčević, Marija and Kalijadis, Ana and Laušević, Zoran and Laušević, Mila D.",
year = "2015",
abstract = "The new and simple approach for deposition of catalytically active TiO2 coating on carbon monolith (CM) carrier was presented. CM photocatalysts were impregnated with TiO2 using titanium solution and thermal treatment, and their photocatalytic activity was investigated in the process of methylene blue (MB) photodegradation. For the purpose of comparison, CM composite photocatalysts were prepared by dip-coating method, which implies binder usage. The presence of TiO2 on CM carrier was confirmed by Raman spectroscopy and scanning electron microscopy. The sorption characteristics of CM and the role of adsorption in the overall process of MB removal were evaluated through amount of surface oxygen groups obtained by temperature-programmed desorption and specific surface area determined by BET method. CM has shown good adsorption properties toward MB due to high amount of surface oxygen groups and relatively high specific surface area. It was concluded that photocatalytic activity increases with CM disc thickness due to increase of MB adsorption and amount of deposited TiO2. Good photocatalytic activity achieved for samples obtained by thermal treatment is the result of better accessibility of MB solution to the TiO2 particles induced by binder absence.",
journal = "Advances in Materials Science and Engineering",
title = "Photocatalytic Performance of Carbon Monolith/TiO2 Composite",
doi = "10.1155/2015/803492"
}

Maletić, M., Vukčević, M., Kalijadis, A., Laušević, Z.,& Laušević, M. D.. (2015). Photocatalytic Performance of Carbon Monolith/TiO2 Composite. in Advances in Materials Science and Engineering.
https://doi.org/10.1155/2015/803492

Maletić M, Vukčević M, Kalijadis A, Laušević Z, Laušević MD. Photocatalytic Performance of Carbon Monolith/TiO2 Composite. in Advances in Materials Science and Engineering. 2015;.
doi:10.1155/2015/803492 .

Maletić, Marina, Vukčević, Marija, Kalijadis, Ana, Laušević, Zoran, Laušević, Mila D., "Photocatalytic Performance of Carbon Monolith/TiO2 Composite" in Advances in Materials Science and Engineering (2015),
https://doi.org/10.1155/2015/803492 . .

TY  - JOUR
AU  - Vukčević, Marija
AU  - Pejić, Biljana
AU  - Kalijadis, Ana
AU  - Pajić-Lijaković, Ivana
AU  - Kostić, Mirjana M.
AU  - Laušević, Zoran
AU  - Laušević, Mila D.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5815
AB  - Carbonized hemp fibers obtained by carbonization of origin and chemically modified waste hemp fibers was used as a low-cost sorbent for heavy metals removal. The efficiency of carbonized hemp fiber samples as a sorbent was tested through the adsorption of lead ions as a heavy metal model ion. Although changes in carbon precursor structure, induced by chemical modification, affect the sorption process and sorption capacity of carbonized hemp fibers, all carbonized hemp fibers samples show good adsorption properties toward lead ions. Obtained experimental data was used for development of the mathematical model that describes both the phenomenon of metal ions transport through the porous sorbent matrices, and the structure of carbonized hemp fibers. Effective diffusion coefficient, damping coefficient and the lead ion concentration profile within the carbonized hemp fibers, obtained as results of proposed mathematical model, give the insight in the mechanism and the rate of adsorption process, while average tortuosity connected the sorbent structure and ions transport through the sorbent. A good agreement between model prediction for both structural and ion transport model parameters and the experimental data, indicates that the proposed mathematical model can be successfully used for optimization of heavy metal ions adsorption process by correlating the model parameters to the carbonized hemp fibers performances. (C) 2013 Elsevier B.V. All rights reserved.
T2  - Chemical Engineering Journal
T1  - Carbon materials from waste short hemp fibers as a sorbent for heavy metal ions - Mathematical modeling of sorbent structure and ions transport
VL  - 235
SP  - 284
EP  - 292
DO  - 10.1016/j.cej.2013.09.047
ER  - 

@article{
author = "Vukčević, Marija and Pejić, Biljana and Kalijadis, Ana and Pajić-Lijaković, Ivana and Kostić, Mirjana M. and Laušević, Zoran and Laušević, Mila D.",
year = "2014",
abstract = "Carbonized hemp fibers obtained by carbonization of origin and chemically modified waste hemp fibers was used as a low-cost sorbent for heavy metals removal. The efficiency of carbonized hemp fiber samples as a sorbent was tested through the adsorption of lead ions as a heavy metal model ion. Although changes in carbon precursor structure, induced by chemical modification, affect the sorption process and sorption capacity of carbonized hemp fibers, all carbonized hemp fibers samples show good adsorption properties toward lead ions. Obtained experimental data was used for development of the mathematical model that describes both the phenomenon of metal ions transport through the porous sorbent matrices, and the structure of carbonized hemp fibers. Effective diffusion coefficient, damping coefficient and the lead ion concentration profile within the carbonized hemp fibers, obtained as results of proposed mathematical model, give the insight in the mechanism and the rate of adsorption process, while average tortuosity connected the sorbent structure and ions transport through the sorbent. A good agreement between model prediction for both structural and ion transport model parameters and the experimental data, indicates that the proposed mathematical model can be successfully used for optimization of heavy metal ions adsorption process by correlating the model parameters to the carbonized hemp fibers performances. (C) 2013 Elsevier B.V. All rights reserved.",
journal = "Chemical Engineering Journal",
title = "Carbon materials from waste short hemp fibers as a sorbent for heavy metal ions - Mathematical modeling of sorbent structure and ions transport",
volume = "235",
pages = "284-292",
doi = "10.1016/j.cej.2013.09.047"
}

Vukčević, M., Pejić, B., Kalijadis, A., Pajić-Lijaković, I., Kostić, M. M., Laušević, Z.,& Laušević, M. D.. (2014). Carbon materials from waste short hemp fibers as a sorbent for heavy metal ions - Mathematical modeling of sorbent structure and ions transport. in Chemical Engineering Journal, 235, 284-292.
https://doi.org/10.1016/j.cej.2013.09.047

Vukčević M, Pejić B, Kalijadis A, Pajić-Lijaković I, Kostić MM, Laušević Z, Laušević MD. Carbon materials from waste short hemp fibers as a sorbent for heavy metal ions - Mathematical modeling of sorbent structure and ions transport. in Chemical Engineering Journal. 2014;235:284-292.
doi:10.1016/j.cej.2013.09.047 .

Vukčević, Marija, Pejić, Biljana, Kalijadis, Ana, Pajić-Lijaković, Ivana, Kostić, Mirjana M., Laušević, Zoran, Laušević, Mila D., "Carbon materials from waste short hemp fibers as a sorbent for heavy metal ions - Mathematical modeling of sorbent structure and ions transport" in Chemical Engineering Journal, 235 (2014):284-292,
https://doi.org/10.1016/j.cej.2013.09.047 . .

TY  - JOUR
AU  - Vukčević, Marija
AU  - Kalijadis, Ana
AU  - Babić, Biljana M.
AU  - Laušević, Zoran
AU  - Laušević, Mila D.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5761
AB  - The capacity of carbon monolith for pesticide removal from water, and the mechanism of pesticide interaction with the carbon surface were examined. Different carbon monolith samples were obtained by varying the carbonization and activation parameters. In order to examine the role of surface oxygen groups on pesticide adsorption, the carbon monolith surface was functionalized by chemical treatment in HNO3, H2O2 and KOH. The surface properties of the obtained samples were investigated by determination of the Brunauer, Emmett and Teller (BET) surface area, pore size distribution and temperature-programmed desorption. Adsorption of pesticides from aqueous solution onto the activated carbon monolith samples was studied using five pesticides belonging to different chemical groups (acetamiprid, dimethoate, nicosulfuron, carbofuran and atrazine). The presented results show that higher temperature of carbonization and amount of activating agent enable microporous carbon monolith with higher numbers of surface functional groups to be obtained. The adsorption properties of the activated carbon monolith were more readily affected by the number of surface functional groups than by the specific surface area. Results obtained after carbon monolith functionalization showed that pi-pi interactions were the driving main force for adsorption of pesticides with an aromatic structure, while acidic groups played an important role in adsorption of pesticides with no aromatic ring in their chemical structure.
T2  - Journal of the Serbian Chemical Society
T1  - Influence of different carbon monolith preparation parameters on pesticide adsorption
VL  - 78
IS  - 10
SP  - 1617
EP  - 1632
DO  - 10.2298/JSC131227006V
ER  - 

@article{
author = "Vukčević, Marija and Kalijadis, Ana and Babić, Biljana M. and Laušević, Zoran and Laušević, Mila D.",
year = "2013",
abstract = "The capacity of carbon monolith for pesticide removal from water, and the mechanism of pesticide interaction with the carbon surface were examined. Different carbon monolith samples were obtained by varying the carbonization and activation parameters. In order to examine the role of surface oxygen groups on pesticide adsorption, the carbon monolith surface was functionalized by chemical treatment in HNO3, H2O2 and KOH. The surface properties of the obtained samples were investigated by determination of the Brunauer, Emmett and Teller (BET) surface area, pore size distribution and temperature-programmed desorption. Adsorption of pesticides from aqueous solution onto the activated carbon monolith samples was studied using five pesticides belonging to different chemical groups (acetamiprid, dimethoate, nicosulfuron, carbofuran and atrazine). The presented results show that higher temperature of carbonization and amount of activating agent enable microporous carbon monolith with higher numbers of surface functional groups to be obtained. The adsorption properties of the activated carbon monolith were more readily affected by the number of surface functional groups than by the specific surface area. Results obtained after carbon monolith functionalization showed that pi-pi interactions were the driving main force for adsorption of pesticides with an aromatic structure, while acidic groups played an important role in adsorption of pesticides with no aromatic ring in their chemical structure.",
journal = "Journal of the Serbian Chemical Society",
title = "Influence of different carbon monolith preparation parameters on pesticide adsorption",
volume = "78",
number = "10",
pages = "1617-1632",
doi = "10.2298/JSC131227006V"
}

Vukčević, M., Kalijadis, A., Babić, B. M., Laušević, Z.,& Laušević, M. D.. (2013). Influence of different carbon monolith preparation parameters on pesticide adsorption. in Journal of the Serbian Chemical Society, 78(10), 1617-1632.
https://doi.org/10.2298/JSC131227006V

Vukčević M, Kalijadis A, Babić BM, Laušević Z, Laušević MD. Influence of different carbon monolith preparation parameters on pesticide adsorption. in Journal of the Serbian Chemical Society. 2013;78(10):1617-1632.
doi:10.2298/JSC131227006V .

Vukčević, Marija, Kalijadis, Ana, Babić, Biljana M., Laušević, Zoran, Laušević, Mila D., "Influence of different carbon monolith preparation parameters on pesticide adsorption" in Journal of the Serbian Chemical Society, 78, no. 10 (2013):1617-1632,
https://doi.org/10.2298/JSC131227006V . .

TY  - JOUR
AU  - Prokic, B. B.
AU  - Bačić, Goran
AU  - Prokic, B.
AU  - Kalijadis, Ana
AU  - Todorović, Vera
AU  - Puškaš, Nela
AU  - Vidojevic, D.
AU  - Laušević, Mila D.
AU  - Laušević, Zoran
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5251
AB  - In modern medicine implants are very important and so is their design and choice of materials. Almost equally important is the choice of imaging technique used to in vivo monitor their fate and biocompatibility. The aim of this study was to evaluate the ability of magnetic resonance imaging (MRI) in monitoring the biocompatibility of two newly designed carbon fibers. We have analyzed the interaction of surface functionalized carbon fibers (basic and acidic) with muscle and subcutaneous tissues of rabbits. MRI techniques showed to be useful in longitudinal monitoring of the surrounding tissues, assessment of biocompatibility of new implants, and in the distinction of in vivo surgical edema from inflammation. Histopathology confirmed MRI results, thus showing that MRI has a great potential for in vivo studies of such materials.
T2  - Acta Veterinaria, Beograd
T1  - In Vivo Mri Biocompatibility Evaluation of Functionalized Carbon Fibers in Reaction with Soft Tissues
VL  - 62
IS  - 5-6
SP  - 683
EP  - 696
DO  - 10.2298/AVB1206683P
ER  - 

@article{
author = "Prokic, B. B. and Bačić, Goran and Prokic, B. and Kalijadis, Ana and Todorović, Vera and Puškaš, Nela and Vidojevic, D. and Laušević, Mila D. and Laušević, Zoran",
year = "2012",
abstract = "In modern medicine implants are very important and so is their design and choice of materials. Almost equally important is the choice of imaging technique used to in vivo monitor their fate and biocompatibility. The aim of this study was to evaluate the ability of magnetic resonance imaging (MRI) in monitoring the biocompatibility of two newly designed carbon fibers. We have analyzed the interaction of surface functionalized carbon fibers (basic and acidic) with muscle and subcutaneous tissues of rabbits. MRI techniques showed to be useful in longitudinal monitoring of the surrounding tissues, assessment of biocompatibility of new implants, and in the distinction of in vivo surgical edema from inflammation. Histopathology confirmed MRI results, thus showing that MRI has a great potential for in vivo studies of such materials.",
journal = "Acta Veterinaria, Beograd",
title = "In Vivo Mri Biocompatibility Evaluation of Functionalized Carbon Fibers in Reaction with Soft Tissues",
volume = "62",
number = "5-6",
pages = "683-696",
doi = "10.2298/AVB1206683P"
}

Prokic, B. B., Bačić, G., Prokic, B., Kalijadis, A., Todorović, V., Puškaš, N., Vidojevic, D., Laušević, M. D.,& Laušević, Z.. (2012). In Vivo Mri Biocompatibility Evaluation of Functionalized Carbon Fibers in Reaction with Soft Tissues. in Acta Veterinaria, Beograd, 62(5-6), 683-696.
https://doi.org/10.2298/AVB1206683P

Prokic BB, Bačić G, Prokic B, Kalijadis A, Todorović V, Puškaš N, Vidojevic D, Laušević MD, Laušević Z. In Vivo Mri Biocompatibility Evaluation of Functionalized Carbon Fibers in Reaction with Soft Tissues. in Acta Veterinaria, Beograd. 2012;62(5-6):683-696.
doi:10.2298/AVB1206683P .

Prokic, B. B., Bačić, Goran, Prokic, B., Kalijadis, Ana, Todorović, Vera, Puškaš, Nela, Vidojevic, D., Laušević, Mila D., Laušević, Zoran, "In Vivo Mri Biocompatibility Evaluation of Functionalized Carbon Fibers in Reaction with Soft Tissues" in Acta Veterinaria, Beograd, 62, no. 5-6 (2012):683-696,
https://doi.org/10.2298/AVB1206683P . .

TY  - JOUR
AU  - Vukčević, Marija
AU  - Kalijadis, Ana
AU  - Radisic, Marina
AU  - Pejić, Biljana
AU  - Kostić, Mirjana M.
AU  - Laušević, Zoran
AU  - Laušević, Mila D.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5272
AB  - There is a growing interest in utilization of abundantly available materials, bio-mass or industrial byproducts, as precursors for the preparation of carbon materials. Short hemp fibers, acquired as waste from textile production, were used as low-cost precursor for production of carbon materials as a sorbent in the solid-phase extraction, for pesticide analysis in water samples. Different carbon materials were prepared by carbonization of unmodified and chemically modified hemp fibers. Activation of carbonized materials with potassium hydroxide improves sorption properties of carbonized hemp fibers by increasing the specific surface area (up to 2192 m(2)/g) and the amount of surface oxygen groups. The following parameters that may affect the solid-phase extraction procedure efficiency were optimized: different elution solvents and the pH value of pesticide solution. Extracts were analyzed by liquid chromatography-tandem mass spectrometry technique. For this study pesticides belonging to the different chemical classes were chosen. Obtained results indicate that carbonized and activated hemp fibers could be successfully applied as a solid-phase sorbent for the pesticide analysis in water samples. (C) 2012 Elsevier B.V. All rights reserved.
T2  - Chemical Engineering Journal
T1  - Application of carbonized hemp fibers as a new solid-phase extraction sorbent for analysis of pesticides in water samples
VL  - 211
SP  - 224
EP  - 232
DO  - 10.1016/j.cej.2012.09.059
ER  - 

@article{
author = "Vukčević, Marija and Kalijadis, Ana and Radisic, Marina and Pejić, Biljana and Kostić, Mirjana M. and Laušević, Zoran and Laušević, Mila D.",
year = "2012",
abstract = "There is a growing interest in utilization of abundantly available materials, bio-mass or industrial byproducts, as precursors for the preparation of carbon materials. Short hemp fibers, acquired as waste from textile production, were used as low-cost precursor for production of carbon materials as a sorbent in the solid-phase extraction, for pesticide analysis in water samples. Different carbon materials were prepared by carbonization of unmodified and chemically modified hemp fibers. Activation of carbonized materials with potassium hydroxide improves sorption properties of carbonized hemp fibers by increasing the specific surface area (up to 2192 m(2)/g) and the amount of surface oxygen groups. The following parameters that may affect the solid-phase extraction procedure efficiency were optimized: different elution solvents and the pH value of pesticide solution. Extracts were analyzed by liquid chromatography-tandem mass spectrometry technique. For this study pesticides belonging to the different chemical classes were chosen. Obtained results indicate that carbonized and activated hemp fibers could be successfully applied as a solid-phase sorbent for the pesticide analysis in water samples. (C) 2012 Elsevier B.V. All rights reserved.",
journal = "Chemical Engineering Journal",
title = "Application of carbonized hemp fibers as a new solid-phase extraction sorbent for analysis of pesticides in water samples",
volume = "211",
pages = "224-232",
doi = "10.1016/j.cej.2012.09.059"
}

Vukčević, M., Kalijadis, A., Radisic, M., Pejić, B., Kostić, M. M., Laušević, Z.,& Laušević, M. D.. (2012). Application of carbonized hemp fibers as a new solid-phase extraction sorbent for analysis of pesticides in water samples. in Chemical Engineering Journal, 211, 224-232.
https://doi.org/10.1016/j.cej.2012.09.059

Vukčević M, Kalijadis A, Radisic M, Pejić B, Kostić MM, Laušević Z, Laušević MD. Application of carbonized hemp fibers as a new solid-phase extraction sorbent for analysis of pesticides in water samples. in Chemical Engineering Journal. 2012;211:224-232.
doi:10.1016/j.cej.2012.09.059 .

Vukčević, Marija, Kalijadis, Ana, Radisic, Marina, Pejić, Biljana, Kostić, Mirjana M., Laušević, Zoran, Laušević, Mila D., "Application of carbonized hemp fibers as a new solid-phase extraction sorbent for analysis of pesticides in water samples" in Chemical Engineering Journal, 211 (2012):224-232,
https://doi.org/10.1016/j.cej.2012.09.059 . .

TY  - JOUR
AU  - Kalijadis, Ana
AU  - Jovanović, Zoran M.
AU  - Laušević, Mila D.
AU  - Laušević, Zoran
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4291
AB  - Boron was introduced into glassy carbon by chemical modification and by irradiating the precursor polymer with boron ions. Using chemical modification, a polymer with uniform distribution of boron in the bulk was obtained, whereas irradiation with B3+ produced a polymer with boron located in a narrow region under the surface. Following modification with boron, the samples were carbonized at 1273 K and examined using X-ray diffraction, Raman spectroscopy, temperature programmed desorption (TPD) and by hardness measurements. Structural analysis results suggest that boron is mostly substitutionally bonded in the glassy carbon structure regardless of the method used to introduce boron into the polymer precursor. Formation of crosslinks between glassy carbon ribbons during carbonization as a consequence of the recombination of ion beam induced changes in the polymer structure and a high concentration of boron in the subsurface layer is proposed to account for an increase of glassy carbon hardness. An increase in the total amount of surface oxygen groups was observed in the TPD spectra of both boron-modified samples due to an increase in the number of active sites. Results show that the nature of these sites is influenced by the initial distribution of boron in the polymer precursor. (C) 2011 Elsevier Ltd. All rights reserved.
T2  - Carbon
T1  - The effect of boron incorporation on the structure and properties of glassy carbon
VL  - 49
IS  - 8
SP  - 2671
EP  - 2678
DO  - 10.1016/j.carbon.2011.02.054
ER  - 

@article{
author = "Kalijadis, Ana and Jovanović, Zoran M. and Laušević, Mila D. and Laušević, Zoran",
year = "2011",
abstract = "Boron was introduced into glassy carbon by chemical modification and by irradiating the precursor polymer with boron ions. Using chemical modification, a polymer with uniform distribution of boron in the bulk was obtained, whereas irradiation with B3+ produced a polymer with boron located in a narrow region under the surface. Following modification with boron, the samples were carbonized at 1273 K and examined using X-ray diffraction, Raman spectroscopy, temperature programmed desorption (TPD) and by hardness measurements. Structural analysis results suggest that boron is mostly substitutionally bonded in the glassy carbon structure regardless of the method used to introduce boron into the polymer precursor. Formation of crosslinks between glassy carbon ribbons during carbonization as a consequence of the recombination of ion beam induced changes in the polymer structure and a high concentration of boron in the subsurface layer is proposed to account for an increase of glassy carbon hardness. An increase in the total amount of surface oxygen groups was observed in the TPD spectra of both boron-modified samples due to an increase in the number of active sites. Results show that the nature of these sites is influenced by the initial distribution of boron in the polymer precursor. (C) 2011 Elsevier Ltd. All rights reserved.",
journal = "Carbon",
title = "The effect of boron incorporation on the structure and properties of glassy carbon",
volume = "49",
number = "8",
pages = "2671-2678",
doi = "10.1016/j.carbon.2011.02.054"
}

Kalijadis, A., Jovanović, Z. M., Laušević, M. D.,& Laušević, Z.. (2011). The effect of boron incorporation on the structure and properties of glassy carbon. in Carbon, 49(8), 2671-2678.
https://doi.org/10.1016/j.carbon.2011.02.054

Kalijadis A, Jovanović ZM, Laušević MD, Laušević Z. The effect of boron incorporation on the structure and properties of glassy carbon. in Carbon. 2011;49(8):2671-2678.
doi:10.1016/j.carbon.2011.02.054 .

Kalijadis, Ana, Jovanović, Zoran M., Laušević, Mila D., Laušević, Zoran, "The effect of boron incorporation on the structure and properties of glassy carbon" in Carbon, 49, no. 8 (2011):2671-2678,
https://doi.org/10.1016/j.carbon.2011.02.054 . .

TY  - JOUR
AU  - Kalijadis, Ana
AU  - Vukčević, Marija M.
AU  - Jovanović, Zoran M.
AU  - Laušević, Zoran
AU  - Laušević, Mila D.
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4342
AB  - The surface characteristics of different carbon materials: activated carbon, carbon felt, glassy carbon and a porous carbon monolith were investigated. The specific surface area was examined by the BET method with N(2) adsorption, the amount and the type of surface oxygen groups by Boehm titration as well as by temperature-programmed desorption (TPD). By comparing the results obtained using BET analysis with those of TPD and the Boehm method, it was found that the number of surface groups was not proportional to the specific surface area. The total amount of oxygen groups, obtained by TPD, is higher than the amount obtained by Boehms method for porous samples. The inconsistencies between these results originate from the fact that the Boehm method is limited to the determination of acidic and basic groups, whereas TPD provides information on the total number of all surface oxygen groups. In addition, the presence of porosity could reduce the solvent-accessible surface in the Boehm method. The TPD profiles of CO evolution showed the presence of a low temperature maximum, below 650 K, which originates from CO(2) reduction on the carbon material surface.
T2  - Journal of the Serbian Chemical Society
T1  - Characterisation of surface oxygen groups on different carbon materials by the Boehm method and temperature-programmed desorption
VL  - 76
IS  - 5
SP  - 757
EP  - 768
DO  - 10.2298/JSC091224056K
ER  - 

@article{
author = "Kalijadis, Ana and Vukčević, Marija M. and Jovanović, Zoran M. and Laušević, Zoran and Laušević, Mila D.",
year = "2011",
abstract = "The surface characteristics of different carbon materials: activated carbon, carbon felt, glassy carbon and a porous carbon monolith were investigated. The specific surface area was examined by the BET method with N(2) adsorption, the amount and the type of surface oxygen groups by Boehm titration as well as by temperature-programmed desorption (TPD). By comparing the results obtained using BET analysis with those of TPD and the Boehm method, it was found that the number of surface groups was not proportional to the specific surface area. The total amount of oxygen groups, obtained by TPD, is higher than the amount obtained by Boehms method for porous samples. The inconsistencies between these results originate from the fact that the Boehm method is limited to the determination of acidic and basic groups, whereas TPD provides information on the total number of all surface oxygen groups. In addition, the presence of porosity could reduce the solvent-accessible surface in the Boehm method. The TPD profiles of CO evolution showed the presence of a low temperature maximum, below 650 K, which originates from CO(2) reduction on the carbon material surface.",
journal = "Journal of the Serbian Chemical Society",
title = "Characterisation of surface oxygen groups on different carbon materials by the Boehm method and temperature-programmed desorption",
volume = "76",
number = "5",
pages = "757-768",
doi = "10.2298/JSC091224056K"
}

Kalijadis, A., Vukčević, M. M., Jovanović, Z. M., Laušević, Z.,& Laušević, M. D.. (2011). Characterisation of surface oxygen groups on different carbon materials by the Boehm method and temperature-programmed desorption. in Journal of the Serbian Chemical Society, 76(5), 757-768.
https://doi.org/10.2298/JSC091224056K

Kalijadis A, Vukčević MM, Jovanović ZM, Laušević Z, Laušević MD. Characterisation of surface oxygen groups on different carbon materials by the Boehm method and temperature-programmed desorption. in Journal of the Serbian Chemical Society. 2011;76(5):757-768.
doi:10.2298/JSC091224056K .

Kalijadis, Ana, Vukčević, Marija M., Jovanović, Zoran M., Laušević, Zoran, Laušević, Mila D., "Characterisation of surface oxygen groups on different carbon materials by the Boehm method and temperature-programmed desorption" in Journal of the Serbian Chemical Society, 76, no. 5 (2011):757-768,
https://doi.org/10.2298/JSC091224056K . .

TY  - JOUR
AU  - Jovanović, Zoran M.
AU  - Kalijadis, Ana
AU  - Vasiljević-Radović, Dana
AU  - Erich, Marko
AU  - Laušević, Mila D.
AU  - Mentus, Slavko V.
AU  - Laušević, Zoran
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4455
AB  - Glassy carbon plates were irradiated with 15 key H(+) ion-beam in the fluence range of 1 x 10(16)-3 x 10(18) ion cm(-2). The influence of ion irradiation on surface morphology and topology was examined by scanning electron and atomic force microscopy. Structural changes were monitored by Raman spectrometry, while changes of wettability and the content of surface oxygen complexes were examined by contact angle measurements and temperature programmed desorption. Elastic recoil detection analysis was applied for determination of hydrogen concentration profiles in irradiated samples. Cyclic voltammetry was used for the assessment of the electrochemical properties of modified glassy carbon electrodes. It was concluded that there is critical fluence range (2 x 10(17)-5 x 10(17) ion cm(-2)) inside of which significant changes of glassy carbon properties occur. (C) 2011 Elsevier Ltd. All rights reserved.
T2  - Carbon
T1  - Modification of glassy carbon properties under low energy proton irradiation
VL  - 49
IS  - 12
SP  - 3737
EP  - 3746
DO  - 10.1016/j.carbon.2011.05.006
ER  - 

@article{
author = "Jovanović, Zoran M. and Kalijadis, Ana and Vasiljević-Radović, Dana and Erich, Marko and Laušević, Mila D. and Mentus, Slavko V. and Laušević, Zoran",
year = "2011",
abstract = "Glassy carbon plates were irradiated with 15 key H(+) ion-beam in the fluence range of 1 x 10(16)-3 x 10(18) ion cm(-2). The influence of ion irradiation on surface morphology and topology was examined by scanning electron and atomic force microscopy. Structural changes were monitored by Raman spectrometry, while changes of wettability and the content of surface oxygen complexes were examined by contact angle measurements and temperature programmed desorption. Elastic recoil detection analysis was applied for determination of hydrogen concentration profiles in irradiated samples. Cyclic voltammetry was used for the assessment of the electrochemical properties of modified glassy carbon electrodes. It was concluded that there is critical fluence range (2 x 10(17)-5 x 10(17) ion cm(-2)) inside of which significant changes of glassy carbon properties occur. (C) 2011 Elsevier Ltd. All rights reserved.",
journal = "Carbon",
title = "Modification of glassy carbon properties under low energy proton irradiation",
volume = "49",
number = "12",
pages = "3737-3746",
doi = "10.1016/j.carbon.2011.05.006"
}

Jovanović, Z. M., Kalijadis, A., Vasiljević-Radović, D., Erich, M., Laušević, M. D., Mentus, S. V.,& Laušević, Z.. (2011). Modification of glassy carbon properties under low energy proton irradiation. in Carbon, 49(12), 3737-3746.
https://doi.org/10.1016/j.carbon.2011.05.006

Jovanović ZM, Kalijadis A, Vasiljević-Radović D, Erich M, Laušević MD, Mentus SV, Laušević Z. Modification of glassy carbon properties under low energy proton irradiation. in Carbon. 2011;49(12):3737-3746.
doi:10.1016/j.carbon.2011.05.006 .

Jovanović, Zoran M., Kalijadis, Ana, Vasiljević-Radović, Dana, Erich, Marko, Laušević, Mila D., Mentus, Slavko V., Laušević, Zoran, "Modification of glassy carbon properties under low energy proton irradiation" in Carbon, 49, no. 12 (2011):3737-3746,
https://doi.org/10.1016/j.carbon.2011.05.006 . .

TY  - JOUR
AU  - Jovanović, Zoran M.
AU  - Kalijadis, Ana
AU  - Laušević, Mila D.
AU  - Laušević, Zoran
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4528
AB  - Glassy carbon was irradiated with 15 key H(+) ion beam. It was observed that the implanted hydrogen is unstable in material and evolves as H, H(2) and H(2)O. Post-irradiation evolution of H, H(2) and H(2)O from proton irradiated glassy carbon was monitored by temperature programmed desorption (TPD) in the period of 30 days. In between irradiation and TPD measurements the irradiated samples were stored in air. The evolution of the molecular hydrogen, although the protons are implanted deeply below the surface of the disordered glassy carbon, proceeds over the same mechanism as in the case of low-energy H-atoms chemisorbed on the very surface of an ideal graphite structure. (C) 2011 Elsevier B.V. All rights reserved.
T2  - Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms
T1  - The evolution of hydrogen from proton irradiated glassy carbon
VL  - 269
IS  - 21
SP  - 2578
EP  - 2583
DO  - 10.1016/j.nimb.2011.07.014
ER  - 

@article{
author = "Jovanović, Zoran M. and Kalijadis, Ana and Laušević, Mila D. and Laušević, Zoran",
year = "2011",
abstract = "Glassy carbon was irradiated with 15 key H(+) ion beam. It was observed that the implanted hydrogen is unstable in material and evolves as H, H(2) and H(2)O. Post-irradiation evolution of H, H(2) and H(2)O from proton irradiated glassy carbon was monitored by temperature programmed desorption (TPD) in the period of 30 days. In between irradiation and TPD measurements the irradiated samples were stored in air. The evolution of the molecular hydrogen, although the protons are implanted deeply below the surface of the disordered glassy carbon, proceeds over the same mechanism as in the case of low-energy H-atoms chemisorbed on the very surface of an ideal graphite structure. (C) 2011 Elsevier B.V. All rights reserved.",
journal = "Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms",
title = "The evolution of hydrogen from proton irradiated glassy carbon",
volume = "269",
number = "21",
pages = "2578-2583",
doi = "10.1016/j.nimb.2011.07.014"
}

Jovanović, Z. M., Kalijadis, A., Laušević, M. D.,& Laušević, Z.. (2011). The evolution of hydrogen from proton irradiated glassy carbon. in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 269(21), 2578-2583.
https://doi.org/10.1016/j.nimb.2011.07.014

Jovanović ZM, Kalijadis A, Laušević MD, Laušević Z. The evolution of hydrogen from proton irradiated glassy carbon. in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms. 2011;269(21):2578-2583.
doi:10.1016/j.nimb.2011.07.014 .

Jovanović, Zoran M., Kalijadis, Ana, Laušević, Mila D., Laušević, Zoran, "The evolution of hydrogen from proton irradiated glassy carbon" in Nuclear Instruments and Methods in Physics Research. Section B: Beam Interactions with Materials and Atoms, 269, no. 21 (2011):2578-2583,
https://doi.org/10.1016/j.nimb.2011.07.014 . .

TY  - JOUR
AU  - Trtić-Petrović, Tatjana M.
AU  - Đorđević, Jelena S.
AU  - Dujakovic, Nikolina
AU  - Kumrić, Ksenija
AU  - Vasiljevic, Tatjana
AU  - Laušević, Mila D.
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6880
AB  - An optimised extraction and cleanup method for the analysis of pesticide in natural water samples is presented. Sixteen pesticides of different polarity and from the different chemical classes (organophosphates, triazines, benzimidazoles, carbamates, carbamides, neonicotinoides, methylureas, phenylureas and benzohydrazides), most frequently used in Serbia, were selected for the analysis. Liquid-phase microextraction in a single hollow fibre (HF-LPME) has been applied for sample preparation. The concentrations of pesticides were determined using HPLC-MS/MS method with electrospray ionisation. The extraction behaviour and selection of the experimental conditions was predicted based on log D and pK (a) values of targeted pesticides, which were calculated applying the computer software ACD/Labs PhysChem Suite v12. The influence of the donor pH and concentration of pesticides, organic phase composition as well as the extraction time on the extraction efficiency was investigated. Optimum extraction conditions were evaluated with respect to the investigated parameters of the extraction. The extraction method was validated for 10 out of 16 studied pesticides. Linear range of the pesticides was 0.1-5 A mu g L(-1) with the correlation coefficient from 0.991 to 0.9998, and the relative standard deviation for three standard measurements was between 0.2 and 11.8%. The limits of detections ranged from 0.026 to 0.237 A mu g L(-1) and the limits of quantifications from 0.094 to 0.793 A mu g L(-1). The optimised two-phase HF-LPME method was successfully applied for determination of moderately polar as well low-polar pesticides in the environmental water samples.
T2  - Analytical and Bioanalytical Chemistry
T1  - Determination of selected pesticides in environmental water by employing liquid-phase microextraction and liquid chromatography-tandem mass spectrometry
VL  - 397
IS  - 6
SP  - 2233
EP  - 2243
DO  - 10.1007/s00216-010-3725-5
ER  - 

@article{
author = "Trtić-Petrović, Tatjana M. and Đorđević, Jelena S. and Dujakovic, Nikolina and Kumrić, Ksenija and Vasiljevic, Tatjana and Laušević, Mila D.",
year = "2010",
abstract = "An optimised extraction and cleanup method for the analysis of pesticide in natural water samples is presented. Sixteen pesticides of different polarity and from the different chemical classes (organophosphates, triazines, benzimidazoles, carbamates, carbamides, neonicotinoides, methylureas, phenylureas and benzohydrazides), most frequently used in Serbia, were selected for the analysis. Liquid-phase microextraction in a single hollow fibre (HF-LPME) has been applied for sample preparation. The concentrations of pesticides were determined using HPLC-MS/MS method with electrospray ionisation. The extraction behaviour and selection of the experimental conditions was predicted based on log D and pK (a) values of targeted pesticides, which were calculated applying the computer software ACD/Labs PhysChem Suite v12. The influence of the donor pH and concentration of pesticides, organic phase composition as well as the extraction time on the extraction efficiency was investigated. Optimum extraction conditions were evaluated with respect to the investigated parameters of the extraction. The extraction method was validated for 10 out of 16 studied pesticides. Linear range of the pesticides was 0.1-5 A mu g L(-1) with the correlation coefficient from 0.991 to 0.9998, and the relative standard deviation for three standard measurements was between 0.2 and 11.8%. The limits of detections ranged from 0.026 to 0.237 A mu g L(-1) and the limits of quantifications from 0.094 to 0.793 A mu g L(-1). The optimised two-phase HF-LPME method was successfully applied for determination of moderately polar as well low-polar pesticides in the environmental water samples.",
journal = "Analytical and Bioanalytical Chemistry",
title = "Determination of selected pesticides in environmental water by employing liquid-phase microextraction and liquid chromatography-tandem mass spectrometry",
volume = "397",
number = "6",
pages = "2233-2243",
doi = "10.1007/s00216-010-3725-5"
}

Trtić-Petrović, T. M., Đorđević, J. S., Dujakovic, N., Kumrić, K., Vasiljevic, T.,& Laušević, M. D.. (2010). Determination of selected pesticides in environmental water by employing liquid-phase microextraction and liquid chromatography-tandem mass spectrometry. in Analytical and Bioanalytical Chemistry, 397(6), 2233-2243.
https://doi.org/10.1007/s00216-010-3725-5

Trtić-Petrović TM, Đorđević JS, Dujakovic N, Kumrić K, Vasiljevic T, Laušević MD. Determination of selected pesticides in environmental water by employing liquid-phase microextraction and liquid chromatography-tandem mass spectrometry. in Analytical and Bioanalytical Chemistry. 2010;397(6):2233-2243.
doi:10.1007/s00216-010-3725-5 .

Trtić-Petrović, Tatjana M., Đorđević, Jelena S., Dujakovic, Nikolina, Kumrić, Ksenija, Vasiljevic, Tatjana, Laušević, Mila D., "Determination of selected pesticides in environmental water by employing liquid-phase microextraction and liquid chromatography-tandem mass spectrometry" in Analytical and Bioanalytical Chemistry, 397, no. 6 (2010):2233-2243,
https://doi.org/10.1007/s00216-010-3725-5 . .

TY  - JOUR
AU  - Jovanović, Zoran M.
AU  - Kalijadis, Ana
AU  - Vukčević, Marija M.
AU  - Laušević, Zoran
AU  - Laušević, Mila D.
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6854
AB  - Carbon monolith was treated with HNO(3), KOH and H(2)O(2). Effects of these treatments on the surface functional groups and on the amount of silver deposited on the CM surface were studied by temperature programmed desorption (TPD) and atomic absorption spectrometry (AAS). As a result of chemical treatment there was an increase in the amount of surface oxygen complexes. The increase in the amount of silver deposit is proportional to the amount of surface groups that produce CO under decomposition. However, the high amount of CO groups, decomposing above 600 degrees C, induces the smaller Ag crystallite size. Therefore, the high temperature CO evolving oxides are, most likely, the initial centers for Ag deposition.
T2  - Hemijska industrija
T1  - Silver Deposition on Chemically Treated Carbon Monolith
VL  - 63
IS  - 3
SP  - 195
EP  - 200
DO  - 10.2298/HEMIND0903195J
ER  - 

@article{
author = "Jovanović, Zoran M. and Kalijadis, Ana and Vukčević, Marija M. and Laušević, Zoran and Laušević, Mila D.",
year = "2009",
abstract = "Carbon monolith was treated with HNO(3), KOH and H(2)O(2). Effects of these treatments on the surface functional groups and on the amount of silver deposited on the CM surface were studied by temperature programmed desorption (TPD) and atomic absorption spectrometry (AAS). As a result of chemical treatment there was an increase in the amount of surface oxygen complexes. The increase in the amount of silver deposit is proportional to the amount of surface groups that produce CO under decomposition. However, the high amount of CO groups, decomposing above 600 degrees C, induces the smaller Ag crystallite size. Therefore, the high temperature CO evolving oxides are, most likely, the initial centers for Ag deposition.",
journal = "Hemijska industrija",
title = "Silver Deposition on Chemically Treated Carbon Monolith",
volume = "63",
number = "3",
pages = "195-200",
doi = "10.2298/HEMIND0903195J"
}

Jovanović, Z. M., Kalijadis, A., Vukčević, M. M., Laušević, Z.,& Laušević, M. D.. (2009). Silver Deposition on Chemically Treated Carbon Monolith. in Hemijska industrija, 63(3), 195-200.
https://doi.org/10.2298/HEMIND0903195J

Jovanović ZM, Kalijadis A, Vukčević MM, Laušević Z, Laušević MD. Silver Deposition on Chemically Treated Carbon Monolith. in Hemijska industrija. 2009;63(3):195-200.
doi:10.2298/HEMIND0903195J .

Jovanović, Zoran M., Kalijadis, Ana, Vukčević, Marija M., Laušević, Zoran, Laušević, Mila D., "Silver Deposition on Chemically Treated Carbon Monolith" in Hemijska industrija, 63, no. 3 (2009):195-200,
https://doi.org/10.2298/HEMIND0903195J . .

TY  - JOUR
AU  - Vukčević, Marija
AU  - Kalijadis, Ana
AU  - Dimitrijević-Branković, Suzana I.
AU  - Laušević, Zoran
AU  - Laušević, Mila D.
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3473
AB  - A carbon monolith with a silver coating was prepared and its antimicrobial behaviour in a flow system was examined. The functional groups on the surface of the carbon monolith were determined by temperature-programmed desorption and Boehms method, and the point of zero charge was determined by mass titration. The specific surface area was examined by N-2 adsorption using the Brunauer, Emmett and Teller ( BET) method. As a test for the surface activity, the deposition of silver from an aqueous solution of a silver salt was used. The morphology and structure of the silver coatings were characterized by scanning electron microscopy and x-ray diffraction. The resistance to the attrition of the silver deposited on the carbon monolith was tested. The antimicrobial activity of the carbon monolith with a silver coating was determined using standard microbiological methods. Carbon monolith samples with a silver coating showed good antimicrobial activity against Escherichia coli, Staphylococcus aureus and Candida albicans, and are therefore suitable for water purification, particularly as personal disposable water filters with a limited capacity.
T2  - Science and Technology of Advanced Materials
T1  - Surface characteristics and antibacterial activity of a silver-doped carbon monolith
VL  - 9
IS  - 1
DO  - 10.1088/1468-6996/9/1/015006
ER  - 

@article{
author = "Vukčević, Marija and Kalijadis, Ana and Dimitrijević-Branković, Suzana I. and Laušević, Zoran and Laušević, Mila D.",
year = "2008",
abstract = "A carbon monolith with a silver coating was prepared and its antimicrobial behaviour in a flow system was examined. The functional groups on the surface of the carbon monolith were determined by temperature-programmed desorption and Boehms method, and the point of zero charge was determined by mass titration. The specific surface area was examined by N-2 adsorption using the Brunauer, Emmett and Teller ( BET) method. As a test for the surface activity, the deposition of silver from an aqueous solution of a silver salt was used. The morphology and structure of the silver coatings were characterized by scanning electron microscopy and x-ray diffraction. The resistance to the attrition of the silver deposited on the carbon monolith was tested. The antimicrobial activity of the carbon monolith with a silver coating was determined using standard microbiological methods. Carbon monolith samples with a silver coating showed good antimicrobial activity against Escherichia coli, Staphylococcus aureus and Candida albicans, and are therefore suitable for water purification, particularly as personal disposable water filters with a limited capacity.",
journal = "Science and Technology of Advanced Materials",
title = "Surface characteristics and antibacterial activity of a silver-doped carbon monolith",
volume = "9",
number = "1",
doi = "10.1088/1468-6996/9/1/015006"
}

Vukčević, M., Kalijadis, A., Dimitrijević-Branković, S. I., Laušević, Z.,& Laušević, M. D.. (2008). Surface characteristics and antibacterial activity of a silver-doped carbon monolith. in Science and Technology of Advanced Materials, 9(1).
https://doi.org/10.1088/1468-6996/9/1/015006

Vukčević M, Kalijadis A, Dimitrijević-Branković SI, Laušević Z, Laušević MD. Surface characteristics and antibacterial activity of a silver-doped carbon monolith. in Science and Technology of Advanced Materials. 2008;9(1).
doi:10.1088/1468-6996/9/1/015006 .

Vukčević, Marija, Kalijadis, Ana, Dimitrijević-Branković, Suzana I., Laušević, Zoran, Laušević, Mila D., "Surface characteristics and antibacterial activity of a silver-doped carbon monolith" in Science and Technology of Advanced Materials, 9, no. 1 (2008),
https://doi.org/10.1088/1468-6996/9/1/015006 . .

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 . .