TY  - CONF
AU  - Rajaković-Ognjanović, Vladana N.
AU  - Karanac, Milica
AU  - Smolar, Jasna
AU  - Petkovšek, Ana
AU  - Đolić, Maja B.
AU  - Despotović, Jovan
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8600
AB  - Fly ash (FA) is a by-product created from the burning of coal in thermal power plants. FA mainly consists of mineral compounds that make them naturally caustic. Despite this, research has shown that FA may be utilized as an alternative material in civil engineering, hydrotechnics and agronomy. Leaching tests may provide theoretical validation that FA may be used as an alternative sorbent or additive in construction material. In this paper, the results of up-flow percolation tests performed on raw FA as well as lime and cement modified samples (MFA) are presented. This method was chosen as it yields the most reliable assessment of releasing heavy metals under long-term exploitation. The research has focused on the leaching behaviour of Sb, As and Se in raw, lime and cement MFA samples. Raw FA was found to leach Se, As and Sb metal ions, cement modification did not prevent Sb and Se leachates, while lime-modified MFA was found to be the most stable material.
C3  - Environmental Engineering and Management Journal
T1  - Use of up-flow percolation test to assess the environmental properties of raw and treated fly ash
VL  - 18
IS  - 8
SP  - 1781
EP  - 1788
UR  - https://hdl.handle.net/21.15107/rcub_vinar_8600
ER  - 

@conference{
author = "Rajaković-Ognjanović, Vladana N. and Karanac, Milica and Smolar, Jasna and Petkovšek, Ana and Đolić, Maja B. and Despotović, Jovan",
year = "2019",
abstract = "Fly ash (FA) is a by-product created from the burning of coal in thermal power plants. FA mainly consists of mineral compounds that make them naturally caustic. Despite this, research has shown that FA may be utilized as an alternative material in civil engineering, hydrotechnics and agronomy. Leaching tests may provide theoretical validation that FA may be used as an alternative sorbent or additive in construction material. In this paper, the results of up-flow percolation tests performed on raw FA as well as lime and cement modified samples (MFA) are presented. This method was chosen as it yields the most reliable assessment of releasing heavy metals under long-term exploitation. The research has focused on the leaching behaviour of Sb, As and Se in raw, lime and cement MFA samples. Raw FA was found to leach Se, As and Sb metal ions, cement modification did not prevent Sb and Se leachates, while lime-modified MFA was found to be the most stable material.",
journal = "Environmental Engineering and Management Journal",
title = "Use of up-flow percolation test to assess the environmental properties of raw and treated fly ash",
volume = "18",
number = "8",
pages = "1781-1788",
url = "https://hdl.handle.net/21.15107/rcub_vinar_8600"
}

Rajaković-Ognjanović, V. N., Karanac, M., Smolar, J., Petkovšek, A., Đolić, M. B.,& Despotović, J.. (2019). Use of up-flow percolation test to assess the environmental properties of raw and treated fly ash. in Environmental Engineering and Management Journal, 18(8), 1781-1788.
https://hdl.handle.net/21.15107/rcub_vinar_8600

Rajaković-Ognjanović VN, Karanac M, Smolar J, Petkovšek A, Đolić MB, Despotović J. Use of up-flow percolation test to assess the environmental properties of raw and treated fly ash. in Environmental Engineering and Management Journal. 2019;18(8):1781-1788.
https://hdl.handle.net/21.15107/rcub_vinar_8600 .

Rajaković-Ognjanović, Vladana N., Karanac, Milica, Smolar, Jasna, Petkovšek, Ana, Đolić, Maja B., Despotović, Jovan, "Use of up-flow percolation test to assess the environmental properties of raw and treated fly ash" in Environmental Engineering and Management Journal, 18, no. 8 (2019):1781-1788,
https://hdl.handle.net/21.15107/rcub_vinar_8600 .

TY  - JOUR
AU  - Karanac, Milica
AU  - Đolić, Maja B.
AU  - Veljović, Đorđe N.
AU  - Rajaković-Ognjanović, Vladana N.
AU  - Veličković, Zlate S.
AU  - Pavićević, Vladimir
AU  - Marinković, Aleksandar D.
PY  - 2018
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0956053X18303490
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7728
AB  - This study focuses on the use of raw fly ash (FA) and modified fly ash – activated by lime (MFA), as effective and low-cost adsorbents for the removal of heavy metals (Zn2+, Pb2+and As(V)), followed by the revalorization of the exhausted adsorbent. The granulometric, elemental analysis, point of zero charge (pHPZC), radiochemical and structural characterization were conducted using X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) and gamma spectrometry techniques. The optimal conditions and key factors influencing the adsorption process were assessed using the response surface method (RSM). The adsorption capacity of the MFA adsorbent for Zn2+, Pb2+and As(V) removal, calculated by the Langmuir model, was found to be 33.13, 26.06, and 29.71 mg g−1, respectively. The kinetic and thermodynamic parameters indicated that the adsorption process is spontaneous and endothermic. Due to their low desorption potential of the exhausted adsorbents, their effective reuse was established to be feasible. For this reason, the valorization of this material as an additive in construction materials was thereafter studied, where testing its toxicity leaching (TCLP) as well as the mechanical properties of construction material containing exhausted MFA confirmed its safe use. Hence, this study points to a possible “two-in-one” reuse of coal ash, initially as an adsorbent and later as an additive in a construction material.
T2  - Waste Management
T1  - The removal of Zn2+, Pb2+, and As(V) ions by lime activated fly ash and valorization of the exhausted adsorbent
VL  - 78
SP  - 366
EP  - 378
DO  - 10.1016/j.wasman.2018.05.052
ER  - 

@article{
author = "Karanac, Milica and Đolić, Maja B. and Veljović, Đorđe N. and Rajaković-Ognjanović, Vladana N. and Veličković, Zlate S. and Pavićević, Vladimir and Marinković, Aleksandar D.",
year = "2018",
abstract = "This study focuses on the use of raw fly ash (FA) and modified fly ash – activated by lime (MFA), as effective and low-cost adsorbents for the removal of heavy metals (Zn2+, Pb2+and As(V)), followed by the revalorization of the exhausted adsorbent. The granulometric, elemental analysis, point of zero charge (pHPZC), radiochemical and structural characterization were conducted using X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) and gamma spectrometry techniques. The optimal conditions and key factors influencing the adsorption process were assessed using the response surface method (RSM). The adsorption capacity of the MFA adsorbent for Zn2+, Pb2+and As(V) removal, calculated by the Langmuir model, was found to be 33.13, 26.06, and 29.71 mg g−1, respectively. The kinetic and thermodynamic parameters indicated that the adsorption process is spontaneous and endothermic. Due to their low desorption potential of the exhausted adsorbents, their effective reuse was established to be feasible. For this reason, the valorization of this material as an additive in construction materials was thereafter studied, where testing its toxicity leaching (TCLP) as well as the mechanical properties of construction material containing exhausted MFA confirmed its safe use. Hence, this study points to a possible “two-in-one” reuse of coal ash, initially as an adsorbent and later as an additive in a construction material.",
journal = "Waste Management",
title = "The removal of Zn2+, Pb2+, and As(V) ions by lime activated fly ash and valorization of the exhausted adsorbent",
volume = "78",
pages = "366-378",
doi = "10.1016/j.wasman.2018.05.052"
}

Karanac, M., Đolić, M. B., Veljović, Đ. N., Rajaković-Ognjanović, V. N., Veličković, Z. S., Pavićević, V.,& Marinković, A. D.. (2018). The removal of Zn2+, Pb2+, and As(V) ions by lime activated fly ash and valorization of the exhausted adsorbent. in Waste Management, 78, 366-378.
https://doi.org/10.1016/j.wasman.2018.05.052

Karanac M, Đolić MB, Veljović ĐN, Rajaković-Ognjanović VN, Veličković ZS, Pavićević V, Marinković AD. The removal of Zn2+, Pb2+, and As(V) ions by lime activated fly ash and valorization of the exhausted adsorbent. in Waste Management. 2018;78:366-378.
doi:10.1016/j.wasman.2018.05.052 .

Karanac, Milica, Đolić, Maja B., Veljović, Đorđe N., Rajaković-Ognjanović, Vladana N., Veličković, Zlate S., Pavićević, Vladimir, Marinković, Aleksandar D., "The removal of Zn2+, Pb2+, and As(V) ions by lime activated fly ash and valorization of the exhausted adsorbent" in Waste Management, 78 (2018):366-378,
https://doi.org/10.1016/j.wasman.2018.05.052 . .

TY  - JOUR
AU  - Đolić, Maja B.
AU  - Rajaković-Ognjanović, Vladana N.
AU  - Štrbac, Svetlana
AU  - Dimitrijević, Suzana I.
AU  - Mitrić, Miodrag
AU  - Onjia, Antonije E.
AU  - Rajaković, Ljubinka V.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1728
AB  - The objective of this study was to investigate the modification of materials used in wastewater treatment for possible antimicrobial application(s). Granulated activated carbon (GAC) and natural clinoptilolite (CLI) were activated using Cu2+-and Zn2+-ions and the disinfection ability of the resulting materials was tested. Studies of the sorption and desorption kinetics were performed in order to determine and clarify the antimicrobial activity of the metal-activated sorbents. The exact sorption capacities of the selected sorbents, GAC and CLI, activated through use of Cu2+-ions, were 15.90 and 3.60 mg/g, respectively, while for the materials activated by Zn2+-ions, the corresponding capacities were 14.00 and 4.72 mg/g,. The desorption rates were 2 and 3 orders of magnitude lower than their sorption efficacy for the Cu2+-, and Zn2+-activated sorbents, respectively. The intermediate sorption capacity and low desorption rate indicated that the overall antimicrobial activity of the metal-modified sorbents was a result of metal ions immobilized onto surface sites. The effect of antimicrobial activity of free ions desorbed from the metal-activated surface may thus be disregarded. The antimicrobial activities of Cu/GAC, Zn/GAC, Cu/CLI and Zn/ CLI were also tested against Escherichia coli, Staphylococcus aureus, and Candida albicans. After 15 min exposure, the highest levels of cell inactivation were obtained through the Cu/CLI and the Cu/GAC against E. coli, 100.0 and 98.24%, respectively. However, for S. aureus and yeast cell inactivation, all Cu2+-and Zn2+-activated sorbents proved to be unsatisfactory. A characterization of the sorbents was performed by Xray diffraction (XRD), X-ray photo electron spectroscopy (XPS), and field emission scanning electron microscopy (FE-SEM). A concentration of the adsorbed and released ions was determined by inductively coupled plasma-optical emission spectroscopy (ICP-OES) and mass spectrometry (ICP-MS). The results showed that the antimicrobial performance of the activated sorbents depended on the surface characteristics of the material, which itself designates the distribution and the bioavailability of the activating agent. (C) 2017 Elsevier B. V. All rights reserved.
T2  - New Biotechnology
T1  - Natural sorbents modified by divalent Cu2+- and Zn2+- ions and their corresponding antimicrobial activity
VL  - 39
SP  - 150
EP  - 159
DO  - 10.1016/j.nbt.2017.03.001
ER  - 

@article{
author = "Đolić, Maja B. and Rajaković-Ognjanović, Vladana N. and Štrbac, Svetlana and Dimitrijević, Suzana I. and Mitrić, Miodrag and Onjia, Antonije E. and Rajaković, Ljubinka V.",
year = "2017",
abstract = "The objective of this study was to investigate the modification of materials used in wastewater treatment for possible antimicrobial application(s). Granulated activated carbon (GAC) and natural clinoptilolite (CLI) were activated using Cu2+-and Zn2+-ions and the disinfection ability of the resulting materials was tested. Studies of the sorption and desorption kinetics were performed in order to determine and clarify the antimicrobial activity of the metal-activated sorbents. The exact sorption capacities of the selected sorbents, GAC and CLI, activated through use of Cu2+-ions, were 15.90 and 3.60 mg/g, respectively, while for the materials activated by Zn2+-ions, the corresponding capacities were 14.00 and 4.72 mg/g,. The desorption rates were 2 and 3 orders of magnitude lower than their sorption efficacy for the Cu2+-, and Zn2+-activated sorbents, respectively. The intermediate sorption capacity and low desorption rate indicated that the overall antimicrobial activity of the metal-modified sorbents was a result of metal ions immobilized onto surface sites. The effect of antimicrobial activity of free ions desorbed from the metal-activated surface may thus be disregarded. The antimicrobial activities of Cu/GAC, Zn/GAC, Cu/CLI and Zn/ CLI were also tested against Escherichia coli, Staphylococcus aureus, and Candida albicans. After 15 min exposure, the highest levels of cell inactivation were obtained through the Cu/CLI and the Cu/GAC against E. coli, 100.0 and 98.24%, respectively. However, for S. aureus and yeast cell inactivation, all Cu2+-and Zn2+-activated sorbents proved to be unsatisfactory. A characterization of the sorbents was performed by Xray diffraction (XRD), X-ray photo electron spectroscopy (XPS), and field emission scanning electron microscopy (FE-SEM). A concentration of the adsorbed and released ions was determined by inductively coupled plasma-optical emission spectroscopy (ICP-OES) and mass spectrometry (ICP-MS). The results showed that the antimicrobial performance of the activated sorbents depended on the surface characteristics of the material, which itself designates the distribution and the bioavailability of the activating agent. (C) 2017 Elsevier B. V. All rights reserved.",
journal = "New Biotechnology",
title = "Natural sorbents modified by divalent Cu2+- and Zn2+- ions and their corresponding antimicrobial activity",
volume = "39",
pages = "150-159",
doi = "10.1016/j.nbt.2017.03.001"
}

Đolić, M. B., Rajaković-Ognjanović, V. N., Štrbac, S., Dimitrijević, S. I., Mitrić, M., Onjia, A. E.,& Rajaković, L. V.. (2017). Natural sorbents modified by divalent Cu2+- and Zn2+- ions and their corresponding antimicrobial activity. in New Biotechnology, 39, 150-159.
https://doi.org/10.1016/j.nbt.2017.03.001

Đolić MB, Rajaković-Ognjanović VN, Štrbac S, Dimitrijević SI, Mitrić M, Onjia AE, Rajaković LV. Natural sorbents modified by divalent Cu2+- and Zn2+- ions and their corresponding antimicrobial activity. in New Biotechnology. 2017;39:150-159.
doi:10.1016/j.nbt.2017.03.001 .

Đolić, Maja B., Rajaković-Ognjanović, Vladana N., Štrbac, Svetlana, Dimitrijević, Suzana I., Mitrić, Miodrag, Onjia, Antonije E., Rajaković, Ljubinka V., "Natural sorbents modified by divalent Cu2+- and Zn2+- ions and their corresponding antimicrobial activity" in New Biotechnology, 39 (2017):150-159,
https://doi.org/10.1016/j.nbt.2017.03.001 . .

TY  - CONF
AU  - Karanac, Milica
AU  - Đolić, Maja
AU  - Rajaković-Ognjanović, Vladana
AU  - Despotović, Jovan
AU  - Mandić-Rajčević, Stefan
AU  - Povrenović, Dragan
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11604
AB  - Zagađujuće materije iz otpadnih voda mogu se ukloniti različitim naprednim tehnikama prečišćavanja. Proces adsorpcije može se primeniti za uklanjanje teških metala iz otpadnih voda primenom brojnih materijala. U termoelektranama (TE) kao sporedni proizvod procesa sagorevanja uglja nastaju pepeo i šljaka. Cilj ovog rada je ispitivanje adsorpcionih svojstava pepela i šljake dodatkom cementa i kreča za uklanjanje jona teških metala (Cu2+, Zn2+, Pb2+ i Cd2+) iz vodenih rastvora. U radu su predstavljeni rezultati ispitivanja upotrebe modifikovanih oblika pepela i šljake kao adsorpcionog materijala. Najveću efikasnost uklanjanja ispitivanih jona pokazali su uzorci pepela i šljake iz TE Kostolac i TE Morava uz dodatak kreča, dok je uzorak pepela iz TE Kostolac uz dodatak cementa pokazao najmanji stepen izluživanja. Izvršena je selekcija materijala za dalja istraživanja koja obuhvataju optimizaciju procesa adsorpcije i karakterizaciju materijala.
AB  - Pollutants can be removed from wastewater by a variety advanced techniques for wastewater treatment. The adsorption process can be utilized for the removal of heavy metals from wastewater using numerous of materials. Fly ash and bottom ash are produced as a by-products of coal combustion in thermal power plants (TPP). The aim of this work has been to investigate the adsorption properties of a mixture made by adding cement and lime in fly ash and bottom ash to remove heavy metal ions (Cu2+, Zn2+, Pb2+ and  Cd2+) from aqueous solutions. This paper presents the results of a modified form of fly ash and bottom ash used as an adsorbent material. The highest removal efficiency of investigated ions has been found in samples of fly ash and bottom ash from TPP Kostolac and TPP Morava with the addition of lime, while the pattern of ash from TPP Kostolac with the addition of cement showed the smallest leaching level.    A selection of the material needs to be made in order to carry out further research that includs the optimization of the adsorption process and better char acterizing of adsorbent materials.
PB  - Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS) : Društvo za procesnu tehniku
C3  - 29. Međunarodni kongres o procesnoj industriji - PROCESING ′16 : zbornik radova
T1  - Uklanjanje teških metala iz vodenih rastvora primenom modifikovanih oblika pepela i šljake iz termoelektrana
T1  - Removal of heavy metals from aqueoussolutions through the use of modified fly ashand bottom ash from thermal power plant
SP  - 227
EP  - 233
UR  - https://hdl.handle.net/21.15107/rcub_vinar_11604
ER  - 

@conference{
author = "Karanac, Milica and Đolić, Maja and Rajaković-Ognjanović, Vladana and Despotović, Jovan and Mandić-Rajčević, Stefan and Povrenović, Dragan",
year = "2016",
abstract = "Zagađujuće materije iz otpadnih voda mogu se ukloniti različitim naprednim tehnikama prečišćavanja. Proces adsorpcije može se primeniti za uklanjanje teških metala iz otpadnih voda primenom brojnih materijala. U termoelektranama (TE) kao sporedni proizvod procesa sagorevanja uglja nastaju pepeo i šljaka. Cilj ovog rada je ispitivanje adsorpcionih svojstava pepela i šljake dodatkom cementa i kreča za uklanjanje jona teških metala (Cu2+, Zn2+, Pb2+ i Cd2+) iz vodenih rastvora. U radu su predstavljeni rezultati ispitivanja upotrebe modifikovanih oblika pepela i šljake kao adsorpcionog materijala. Najveću efikasnost uklanjanja ispitivanih jona pokazali su uzorci pepela i šljake iz TE Kostolac i TE Morava uz dodatak kreča, dok je uzorak pepela iz TE Kostolac uz dodatak cementa pokazao najmanji stepen izluživanja. Izvršena je selekcija materijala za dalja istraživanja koja obuhvataju optimizaciju procesa adsorpcije i karakterizaciju materijala., Pollutants can be removed from wastewater by a variety advanced techniques for wastewater treatment. The adsorption process can be utilized for the removal of heavy metals from wastewater using numerous of materials. Fly ash and bottom ash are produced as a by-products of coal combustion in thermal power plants (TPP). The aim of this work has been to investigate the adsorption properties of a mixture made by adding cement and lime in fly ash and bottom ash to remove heavy metal ions (Cu2+, Zn2+, Pb2+ and  Cd2+) from aqueous solutions. This paper presents the results of a modified form of fly ash and bottom ash used as an adsorbent material. The highest removal efficiency of investigated ions has been found in samples of fly ash and bottom ash from TPP Kostolac and TPP Morava with the addition of lime, while the pattern of ash from TPP Kostolac with the addition of cement showed the smallest leaching level.    A selection of the material needs to be made in order to carry out further research that includs the optimization of the adsorption process and better char acterizing of adsorbent materials.",
publisher = "Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS) : Društvo za procesnu tehniku",
journal = "29. Međunarodni kongres o procesnoj industriji - PROCESING ′16 : zbornik radova",
title = "Uklanjanje teških metala iz vodenih rastvora primenom modifikovanih oblika pepela i šljake iz termoelektrana, Removal of heavy metals from aqueoussolutions through the use of modified fly ashand bottom ash from thermal power plant",
pages = "227-233",
url = "https://hdl.handle.net/21.15107/rcub_vinar_11604"
}

Karanac, M., Đolić, M., Rajaković-Ognjanović, V., Despotović, J., Mandić-Rajčević, S.,& Povrenović, D.. (2016). Uklanjanje teških metala iz vodenih rastvora primenom modifikovanih oblika pepela i šljake iz termoelektrana. in 29. Međunarodni kongres o procesnoj industriji - PROCESING ′16 : zbornik radova
Beograd : Savez mašinskih i elektrotehničkih inženjera i tehničara Srbije (SMEITS) : Društvo za procesnu tehniku., 227-233.
https://hdl.handle.net/21.15107/rcub_vinar_11604

Karanac M, Đolić M, Rajaković-Ognjanović V, Despotović J, Mandić-Rajčević S, Povrenović D. Uklanjanje teških metala iz vodenih rastvora primenom modifikovanih oblika pepela i šljake iz termoelektrana. in 29. Međunarodni kongres o procesnoj industriji - PROCESING ′16 : zbornik radova. 2016;:227-233.
https://hdl.handle.net/21.15107/rcub_vinar_11604 .

Karanac, Milica, Đolić, Maja, Rajaković-Ognjanović, Vladana, Despotović, Jovan, Mandić-Rajčević, Stefan, Povrenović, Dragan, "Uklanjanje teških metala iz vodenih rastvora primenom modifikovanih oblika pepela i šljake iz termoelektrana" in 29. Međunarodni kongres o procesnoj industriji - PROCESING ′16 : zbornik radova (2016):227-233,
https://hdl.handle.net/21.15107/rcub_vinar_11604 .

TY  - JOUR
AU  - Đukić, Aleksandar
AU  - Lekić, Branislava M.
AU  - Rajaković-Ognjanović, Vladana N.
AU  - Veljović, Đorđe N.
AU  - Vulić, Tatjana
AU  - Đolić, Maja B.
AU  - Naunović, Zorana
AU  - Despotović, Jovan
AU  - Prodanović, Dušan M.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1067
AB  - Various particles and materials, including pollutants, deposited on urban surfaces are washed off by stormwater runoff during rain events. The interactions between the solid and dissolved compounds in stormwater runoff are phenomena of importance for the selection and improvement of optimal stormwater management practices aimed at minimizing pollutant input to receiving waters. The objective of this research was to further investigate the mechanisms responsible for the partitioning of heavy metals (HM) between the solid and liquid phases in urban stormwater runoff. The research involved the collection of samples from urban asphalt surfaces, chemical characterization of the bulk liquid samples, solids separation, particle size distribution fractionation and chemical and physicochemical characterization of the solid phase particles. The results revealed that a negligible fraction of HM was present in the liquid phase (less than 3% by weight), while there was a strong correlation between the total content of heavy metals and total suspended solids. Examinations of surface morphology and mineralogy revealed that the solid phase particles consist predominantly of natural macroporous materials: alpha quartz (80%), magnetite (11.4%) and silicon diphosphate (8.9%). These materials have a low surface area and do not have significant adsorptive capacity. These materials have a low surface area and do not have significant adsorptive capacity. The presence of HM on the surface of solid particles was not confirmed by scanning electron microscopy and energy dispersive X-ray microanalyses. These findings, along with the results of the liquid phase sample characterization, indicate that the partitioning of HM between the liquid and solid phases in the analyzed samples may be attributed to precipitation processes. (C) 2015 Elsevier Ltd. All rights reserved.
PB  - Elsevier
T2  - Journal of Environmental Management
T1  - Further insight into the mechanism of heavy metals partitioning in stormwater runoff
VL  - 168
SP  - 104
EP  - 110
DO  - 10.1016/j.jenvman.2015.11.035
ER  - 

@article{
author = "Đukić, Aleksandar and Lekić, Branislava M. and Rajaković-Ognjanović, Vladana N. and Veljović, Đorđe N. and Vulić, Tatjana and Đolić, Maja B. and Naunović, Zorana and Despotović, Jovan and Prodanović, Dušan M.",
year = "2016",
abstract = "Various particles and materials, including pollutants, deposited on urban surfaces are washed off by stormwater runoff during rain events. The interactions between the solid and dissolved compounds in stormwater runoff are phenomena of importance for the selection and improvement of optimal stormwater management practices aimed at minimizing pollutant input to receiving waters. The objective of this research was to further investigate the mechanisms responsible for the partitioning of heavy metals (HM) between the solid and liquid phases in urban stormwater runoff. The research involved the collection of samples from urban asphalt surfaces, chemical characterization of the bulk liquid samples, solids separation, particle size distribution fractionation and chemical and physicochemical characterization of the solid phase particles. The results revealed that a negligible fraction of HM was present in the liquid phase (less than 3% by weight), while there was a strong correlation between the total content of heavy metals and total suspended solids. Examinations of surface morphology and mineralogy revealed that the solid phase particles consist predominantly of natural macroporous materials: alpha quartz (80%), magnetite (11.4%) and silicon diphosphate (8.9%). These materials have a low surface area and do not have significant adsorptive capacity. These materials have a low surface area and do not have significant adsorptive capacity. The presence of HM on the surface of solid particles was not confirmed by scanning electron microscopy and energy dispersive X-ray microanalyses. These findings, along with the results of the liquid phase sample characterization, indicate that the partitioning of HM between the liquid and solid phases in the analyzed samples may be attributed to precipitation processes. (C) 2015 Elsevier Ltd. All rights reserved.",
publisher = "Elsevier",
journal = "Journal of Environmental Management",
title = "Further insight into the mechanism of heavy metals partitioning in stormwater runoff",
volume = "168",
pages = "104-110",
doi = "10.1016/j.jenvman.2015.11.035"
}

Đukić, A., Lekić, B. M., Rajaković-Ognjanović, V. N., Veljović, Đ. N., Vulić, T., Đolić, M. B., Naunović, Z., Despotović, J.,& Prodanović, D. M.. (2016). Further insight into the mechanism of heavy metals partitioning in stormwater runoff. in Journal of Environmental Management
Elsevier., 168, 104-110.
https://doi.org/10.1016/j.jenvman.2015.11.035

Đukić A, Lekić BM, Rajaković-Ognjanović VN, Veljović ĐN, Vulić T, Đolić MB, Naunović Z, Despotović J, Prodanović DM. Further insight into the mechanism of heavy metals partitioning in stormwater runoff. in Journal of Environmental Management. 2016;168:104-110.
doi:10.1016/j.jenvman.2015.11.035 .

Đukić, Aleksandar, Lekić, Branislava M., Rajaković-Ognjanović, Vladana N., Veljović, Đorđe N., Vulić, Tatjana, Đolić, Maja B., Naunović, Zorana, Despotović, Jovan, Prodanović, Dušan M., "Further insight into the mechanism of heavy metals partitioning in stormwater runoff" in Journal of Environmental Management, 168 (2016):104-110,
https://doi.org/10.1016/j.jenvman.2015.11.035 . .

TY  - JOUR
AU  - Đolić, Maja B.
AU  - Rajaković-Ognjanović, Vladana N.
AU  - Marković, Jelena P.
AU  - Janković Mandić, Ljiljana
AU  - Mitrić, Miodrag
AU  - Onjia, Antonije E.
AU  - Rajaković, Ljubinka V.
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/282
AB  - Natural minerals, such as quartz, clinoptilolite and calcite, are useful as sorbents for various applications, but their content of heavy metals ions is the most problematic obstacle to their application. Before their (re)use, the minerals must be purified. In this work, the subject was desorption of lead from a natural multi-component mineral sample consisting of a mixture of silicates (mainly quartz and clinoptilolite) and calcite formations. Besides deionized water, different extraction solutions were tested: NaCl, KCl, CaCl2, MgCl2, HCl, HNO3, EDTA, EDTA/HCl, EDTA/NaOAc-HOAc, HOAc, NaOAc and NaOAc-HOAc. Several parameters were varied in order to obtain the optimal conditions for the desorption process: the concentration of the extraction solution, the ratio of the mass of the sample and volume of the extractant, and the pH value of the suspension. The best purification effect in one desorption cycle was obtained when 0.1 M EDTA, at a pH value of 3.5 (0.2 M EDTA was mixed with 0.01 M acetic buffer, at pH value 3.0, in ratio 1:1) was applied. Sequential extraction (5 consecutive iterations) was performed to provide a more efficient purification process. The lead content (58.20 mg/kg) was decreased by: 20% (using HOAc), 21% (using EDTA) and by more than 50% (using EDTA/NaOAc-HOAc). The pH value and conductivity were measured at all critical points to clarify the mechanism of the desorption process. The formation of Pb-EDTA complex is the result of two parallel phenomena, complexing and ion-exchange. An enhanced adsorption capacity and an improved microelement profile for the purified samples were also attained. The mineralogical and radiochemical performances of the sample were determined by the X-ray diffraction and gamma spectrometry techniques. Microelement analyses of the native and purified samples were performed by inductively coupled plasma optical emission spectroscopy (ICP-OES). (C) 2014 Elsevier B.V. All rights reserved.
T2  - Applied Surface Science
T1  - The effect of different extractants on lead desorption from a natural mineral
VL  - 324
SP  - 221
EP  - 231
DO  - 10.1016/j.apsusc.2014.10.112
ER  - 

@article{
author = "Đolić, Maja B. and Rajaković-Ognjanović, Vladana N. and Marković, Jelena P. and Janković Mandić, Ljiljana and Mitrić, Miodrag and Onjia, Antonije E. and Rajaković, Ljubinka V.",
year = "2015",
abstract = "Natural minerals, such as quartz, clinoptilolite and calcite, are useful as sorbents for various applications, but their content of heavy metals ions is the most problematic obstacle to their application. Before their (re)use, the minerals must be purified. In this work, the subject was desorption of lead from a natural multi-component mineral sample consisting of a mixture of silicates (mainly quartz and clinoptilolite) and calcite formations. Besides deionized water, different extraction solutions were tested: NaCl, KCl, CaCl2, MgCl2, HCl, HNO3, EDTA, EDTA/HCl, EDTA/NaOAc-HOAc, HOAc, NaOAc and NaOAc-HOAc. Several parameters were varied in order to obtain the optimal conditions for the desorption process: the concentration of the extraction solution, the ratio of the mass of the sample and volume of the extractant, and the pH value of the suspension. The best purification effect in one desorption cycle was obtained when 0.1 M EDTA, at a pH value of 3.5 (0.2 M EDTA was mixed with 0.01 M acetic buffer, at pH value 3.0, in ratio 1:1) was applied. Sequential extraction (5 consecutive iterations) was performed to provide a more efficient purification process. The lead content (58.20 mg/kg) was decreased by: 20% (using HOAc), 21% (using EDTA) and by more than 50% (using EDTA/NaOAc-HOAc). The pH value and conductivity were measured at all critical points to clarify the mechanism of the desorption process. The formation of Pb-EDTA complex is the result of two parallel phenomena, complexing and ion-exchange. An enhanced adsorption capacity and an improved microelement profile for the purified samples were also attained. The mineralogical and radiochemical performances of the sample were determined by the X-ray diffraction and gamma spectrometry techniques. Microelement analyses of the native and purified samples were performed by inductively coupled plasma optical emission spectroscopy (ICP-OES). (C) 2014 Elsevier B.V. All rights reserved.",
journal = "Applied Surface Science",
title = "The effect of different extractants on lead desorption from a natural mineral",
volume = "324",
pages = "221-231",
doi = "10.1016/j.apsusc.2014.10.112"
}

Đolić, M. B., Rajaković-Ognjanović, V. N., Marković, J. P., Janković Mandić, L., Mitrić, M., Onjia, A. E.,& Rajaković, L. V.. (2015). The effect of different extractants on lead desorption from a natural mineral. in Applied Surface Science, 324, 221-231.
https://doi.org/10.1016/j.apsusc.2014.10.112

Đolić MB, Rajaković-Ognjanović VN, Marković JP, Janković Mandić L, Mitrić M, Onjia AE, Rajaković LV. The effect of different extractants on lead desorption from a natural mineral. in Applied Surface Science. 2015;324:221-231.
doi:10.1016/j.apsusc.2014.10.112 .

Đolić, Maja B., Rajaković-Ognjanović, Vladana N., Marković, Jelena P., Janković Mandić, Ljiljana, Mitrić, Miodrag, Onjia, Antonije E., Rajaković, Ljubinka V., "The effect of different extractants on lead desorption from a natural mineral" in Applied Surface Science, 324 (2015):221-231,
https://doi.org/10.1016/j.apsusc.2014.10.112 . .

TY  - JOUR
AU  - Đolić, Maja B.
AU  - Rajaković-Ognjanović, Vladana N.
AU  - Štrbac, Svetlana
AU  - Rakočević, Zlatko Lj.
AU  - Veljović, Đorđe N.
AU  - Dimitrijević, Suzana I.
AU  - Rajaković, Ljubinka V.
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/849
AB  - This study is focused on the surface modifications of the materials that are used for antimicrobial water treatment. Sorbents of different origin were activated by Ag+-ions. The selection of the most appropriate materials and the most effective activation agents was done according to the results of the sorption and desorption kinetic studies. Sorption capacities of selected sorbents: granulated activated carbon (GAC), zeolite (Z), and titanium dioxide (T), activated by Ag+-ions were following: 42.06, 13.51 and 17.53 mg/g, respectively. The antimicrobial activity of Ag/Z, Ag/GAC and Ag/T sorbents were tested against Gram-negative bacteria E. coli, Gram-positive bacteria S. aureus and yeast C. albicans. After 15 min of exposure period, the highest cell removal was obtained using Ag/Z against S. aureus and E. coli, 98.8 and 93.5%, respectively. Yeast cell inactivation was unsatisfactory for all three activated sorbents. The antimicrobial pathway of the activated sorbents has been examined by two separate tests - Ag+-ions desorbed from the activated surface to the aqueous phase and microbial cell removal caused by the Ag+-ions from the solid phase (activated surface sites). The results indicated that disinfection process significantly depended on the microbial-activated sites interactions on the modified surface. The chemical state of the activating agent had crucial impact to the inhibition rate. The characterization of the native and modified sorbents was performed by X-ray diffraction technique, X-ray photoelectron spectroscopy and scanning electron microscope. The concentration of adsorbed and released ions was determined by inductively coupled plasma optical emission spectroscopy and mass spectrometry. The antimicrobial efficiency of activated sorbents was related not only to the concentration of the activating agent, but moreover on the surface characteristics of the material, which affects the distribution and the accessibility of the activating agent. (C) 2015 Elsevier B.V. All rights reserved.
PB  - Elsevier
T2  - Applied Surface Science
T1  - The antimicrobial efficiency of silver activated sorbents
VL  - 357
SP  - 819
EP  - 831
DO  - 10.1016/j.apsusc.2015.09.032
ER  - 

@article{
author = "Đolić, Maja B. and Rajaković-Ognjanović, Vladana N. and Štrbac, Svetlana and Rakočević, Zlatko Lj. and Veljović, Đorđe N. and Dimitrijević, Suzana I. and Rajaković, Ljubinka V.",
year = "2015",
abstract = "This study is focused on the surface modifications of the materials that are used for antimicrobial water treatment. Sorbents of different origin were activated by Ag+-ions. The selection of the most appropriate materials and the most effective activation agents was done according to the results of the sorption and desorption kinetic studies. Sorption capacities of selected sorbents: granulated activated carbon (GAC), zeolite (Z), and titanium dioxide (T), activated by Ag+-ions were following: 42.06, 13.51 and 17.53 mg/g, respectively. The antimicrobial activity of Ag/Z, Ag/GAC and Ag/T sorbents were tested against Gram-negative bacteria E. coli, Gram-positive bacteria S. aureus and yeast C. albicans. After 15 min of exposure period, the highest cell removal was obtained using Ag/Z against S. aureus and E. coli, 98.8 and 93.5%, respectively. Yeast cell inactivation was unsatisfactory for all three activated sorbents. The antimicrobial pathway of the activated sorbents has been examined by two separate tests - Ag+-ions desorbed from the activated surface to the aqueous phase and microbial cell removal caused by the Ag+-ions from the solid phase (activated surface sites). The results indicated that disinfection process significantly depended on the microbial-activated sites interactions on the modified surface. The chemical state of the activating agent had crucial impact to the inhibition rate. The characterization of the native and modified sorbents was performed by X-ray diffraction technique, X-ray photoelectron spectroscopy and scanning electron microscope. The concentration of adsorbed and released ions was determined by inductively coupled plasma optical emission spectroscopy and mass spectrometry. The antimicrobial efficiency of activated sorbents was related not only to the concentration of the activating agent, but moreover on the surface characteristics of the material, which affects the distribution and the accessibility of the activating agent. (C) 2015 Elsevier B.V. All rights reserved.",
publisher = "Elsevier",
journal = "Applied Surface Science",
title = "The antimicrobial efficiency of silver activated sorbents",
volume = "357",
pages = "819-831",
doi = "10.1016/j.apsusc.2015.09.032"
}

Đolić, M. B., Rajaković-Ognjanović, V. N., Štrbac, S., Rakočević, Z. Lj., Veljović, Đ. N., Dimitrijević, S. I.,& Rajaković, L. V.. (2015). The antimicrobial efficiency of silver activated sorbents. in Applied Surface Science
Elsevier., 357, 819-831.
https://doi.org/10.1016/j.apsusc.2015.09.032

Đolić MB, Rajaković-Ognjanović VN, Štrbac S, Rakočević ZL, Veljović ĐN, Dimitrijević SI, Rajaković LV. The antimicrobial efficiency of silver activated sorbents. in Applied Surface Science. 2015;357:819-831.
doi:10.1016/j.apsusc.2015.09.032 .

Đolić, Maja B., Rajaković-Ognjanović, Vladana N., Štrbac, Svetlana, Rakočević, Zlatko Lj., Veljović, Đorđe N., Dimitrijević, Suzana I., Rajaković, Ljubinka V., "The antimicrobial efficiency of silver activated sorbents" in Applied Surface Science, 357 (2015):819-831,
https://doi.org/10.1016/j.apsusc.2015.09.032 . .

TY  - CONF
AU  - Markovski, Jasmina S.
AU  - Hristovski, Kiril D.
AU  - Rajaković-Ognjanović, Vladana N.
AU  - Marinković, Aleksandar D.
PY  - 2015
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/7095
AB  - The Republic of Serbia is a good example of a developing country with a water management system that has not been adequately transitioned to address the need of the new socio-economic paradigm. Consequently, more than 30% of generated potable water is lost in transportation, sewage collection and treatment significantly lag behind water supply and only 10% of the collected sewage receiving adequate treatment witch further burdens the already unsatisfying quality of water resources. In order to mitigate the upcoming effects of climate change and successfully manage the water resources for the next generations, the goal of this study is to identify and evaluate the existing barriers that hinder the development and implementation of an integrated national water resources management system. To achieve this goal, water resources management system in Serbia is examined through the prism of regulations, management, engineering, and education, which represent principal pillars of every national socio-economic system. The key findings and the outcomes of this study reveals that an in-depth analysis of existing situation and identification of barriers represent important initial steps in process of developing and implementing an integrated national water management system.
C3  - ACS Symposium Series / American Chemical Society
T1  - Building a Sustainable Water Management System in the Republic of Serbia: Challenges and Issues
VL  - 1206
SP  - 257
EP  - 283
UR  - https://hdl.handle.net/21.15107/rcub_vinar_7095
ER  - 

@conference{
author = "Markovski, Jasmina S. and Hristovski, Kiril D. and Rajaković-Ognjanović, Vladana N. and Marinković, Aleksandar D.",
year = "2015",
abstract = "The Republic of Serbia is a good example of a developing country with a water management system that has not been adequately transitioned to address the need of the new socio-economic paradigm. Consequently, more than 30% of generated potable water is lost in transportation, sewage collection and treatment significantly lag behind water supply and only 10% of the collected sewage receiving adequate treatment witch further burdens the already unsatisfying quality of water resources. In order to mitigate the upcoming effects of climate change and successfully manage the water resources for the next generations, the goal of this study is to identify and evaluate the existing barriers that hinder the development and implementation of an integrated national water resources management system. To achieve this goal, water resources management system in Serbia is examined through the prism of regulations, management, engineering, and education, which represent principal pillars of every national socio-economic system. The key findings and the outcomes of this study reveals that an in-depth analysis of existing situation and identification of barriers represent important initial steps in process of developing and implementing an integrated national water management system.",
journal = "ACS Symposium Series / American Chemical Society",
title = "Building a Sustainable Water Management System in the Republic of Serbia: Challenges and Issues",
volume = "1206",
pages = "257-283",
url = "https://hdl.handle.net/21.15107/rcub_vinar_7095"
}

Markovski, J. S., Hristovski, K. D., Rajaković-Ognjanović, V. N.,& Marinković, A. D.. (2015). Building a Sustainable Water Management System in the Republic of Serbia: Challenges and Issues. in ACS Symposium Series / American Chemical Society, 1206, 257-283.
https://hdl.handle.net/21.15107/rcub_vinar_7095

Markovski JS, Hristovski KD, Rajaković-Ognjanović VN, Marinković AD. Building a Sustainable Water Management System in the Republic of Serbia: Challenges and Issues. in ACS Symposium Series / American Chemical Society. 2015;1206:257-283.
https://hdl.handle.net/21.15107/rcub_vinar_7095 .

Markovski, Jasmina S., Hristovski, Kiril D., Rajaković-Ognjanović, Vladana N., Marinković, Aleksandar D., "Building a Sustainable Water Management System in the Republic of Serbia: Challenges and Issues" in ACS Symposium Series / American Chemical Society, 1206 (2015):257-283,
https://hdl.handle.net/21.15107/rcub_vinar_7095 .

TY  - JOUR
AU  - Markovic, Dana D.
AU  - Lekić, Branislava M.
AU  - Rajaković-Ognjanović, Vladana N.
AU  - Onjia, Antonije E.
AU  - Rajaković, Ljubinka V.
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5871
AB  - Numerous regression approaches to isotherm parameters estimation appear in the literature. The real insight into the proper modeling pattern can be achieved only by testing methods on a very big number of cases. Experimentally, it cannot be done in a reasonable time, so the Monte Carlo simulation method was applied. The objective of this paper is to introduce and compare numerical approaches that involve different levels of knowledge about the noise structure of the analytical method used for initial and equilibrium concentration determination. Six levels of homoscedastic noise and five types of heteroscedastic noise precision models were considered. Performance of the methods was statistically evaluated based on median percentage error and mean absolute relative error in parameter estimates. The present study showed a clear distinction between two cases. When equilibrium experiments are performed only once, for the homoscedastic case, the winning error function is ordinary least squares, while for the case of heteroscedastic noise the use of orthogonal distance regression or Margarts percent standard deviation is suggested. It was found that in case when experiments are repeated three times the simple method of weighted least squares performed as well as more complicated orthogonal distance regression method.
T2  - Scientific World Journal
T1  - A New Approach in Regression Analysis for Modeling Adsorption Isotherms
DO  - 10.1155/2014/930879
ER  - 

@article{
author = "Markovic, Dana D. and Lekić, Branislava M. and Rajaković-Ognjanović, Vladana N. and Onjia, Antonije E. and Rajaković, Ljubinka V.",
year = "2014",
abstract = "Numerous regression approaches to isotherm parameters estimation appear in the literature. The real insight into the proper modeling pattern can be achieved only by testing methods on a very big number of cases. Experimentally, it cannot be done in a reasonable time, so the Monte Carlo simulation method was applied. The objective of this paper is to introduce and compare numerical approaches that involve different levels of knowledge about the noise structure of the analytical method used for initial and equilibrium concentration determination. Six levels of homoscedastic noise and five types of heteroscedastic noise precision models were considered. Performance of the methods was statistically evaluated based on median percentage error and mean absolute relative error in parameter estimates. The present study showed a clear distinction between two cases. When equilibrium experiments are performed only once, for the homoscedastic case, the winning error function is ordinary least squares, while for the case of heteroscedastic noise the use of orthogonal distance regression or Margarts percent standard deviation is suggested. It was found that in case when experiments are repeated three times the simple method of weighted least squares performed as well as more complicated orthogonal distance regression method.",
journal = "Scientific World Journal",
title = "A New Approach in Regression Analysis for Modeling Adsorption Isotherms",
doi = "10.1155/2014/930879"
}

Markovic, D. D., Lekić, B. M., Rajaković-Ognjanović, V. N., Onjia, A. E.,& Rajaković, L. V.. (2014). A New Approach in Regression Analysis for Modeling Adsorption Isotherms. in Scientific World Journal.
https://doi.org/10.1155/2014/930879

Markovic DD, Lekić BM, Rajaković-Ognjanović VN, Onjia AE, Rajaković LV. A New Approach in Regression Analysis for Modeling Adsorption Isotherms. in Scientific World Journal. 2014;.
doi:10.1155/2014/930879 .

Markovic, Dana D., Lekić, Branislava M., Rajaković-Ognjanović, Vladana N., Onjia, Antonije E., Rajaković, Ljubinka V., "A New Approach in Regression Analysis for Modeling Adsorption Isotherms" in Scientific World Journal (2014),
https://doi.org/10.1155/2014/930879 . .

TY  - JOUR
AU  - Lekić, Branislava M.
AU  - Markovic, Dana D.
AU  - Rajaković-Ognjanović, Vladana N.
AU  - Đukić, Aleksandar R.
AU  - Rajaković, Ljubinka V.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5698
AB  - In this study, removal of arsenic ions using two industrial by-products as adsorbents is represented. Removal of As(III) and As(V) from water was carried out with industrial by-products: residual from the groundwater treatment process, iron-manganese oxide coated sand (IMOCS), and blast furnace slag from steel production (BFS), both inexpensive and locally available. In addition, the BFS was modified in order to minimise its deteriorating impact on the initial water quality. Kinetic and equilibrium studies were carried out using batch and fixed-bed column adsorption techniques under the conditions that are likely to occur in real water treatment systems. To evaluate the application for real groundwater treatment, the capacities of the selected materials were further compared to those exhibited by commercial sorbents, which were examined under the same experimental conditions. IMOCS was found to be a good and inexpensive sorbent for arsenic, while BFS and modified slag showed the highest affinity towards arsenic. All examined waste materials exhibited better sorption performances for As(V). The maximum sorption capacity in the batch reactor was obtained for blast furnace slag, 4040 mu gAs(V)/g.
T2  - Journal of Chemistry
T1  - Arsenic Removal from Water Using Industrial By-Products
DO  - 10.1155/2013/121024
ER  - 

@article{
author = "Lekić, Branislava M. and Markovic, Dana D. and Rajaković-Ognjanović, Vladana N. and Đukić, Aleksandar R. and Rajaković, Ljubinka V.",
year = "2013",
abstract = "In this study, removal of arsenic ions using two industrial by-products as adsorbents is represented. Removal of As(III) and As(V) from water was carried out with industrial by-products: residual from the groundwater treatment process, iron-manganese oxide coated sand (IMOCS), and blast furnace slag from steel production (BFS), both inexpensive and locally available. In addition, the BFS was modified in order to minimise its deteriorating impact on the initial water quality. Kinetic and equilibrium studies were carried out using batch and fixed-bed column adsorption techniques under the conditions that are likely to occur in real water treatment systems. To evaluate the application for real groundwater treatment, the capacities of the selected materials were further compared to those exhibited by commercial sorbents, which were examined under the same experimental conditions. IMOCS was found to be a good and inexpensive sorbent for arsenic, while BFS and modified slag showed the highest affinity towards arsenic. All examined waste materials exhibited better sorption performances for As(V). The maximum sorption capacity in the batch reactor was obtained for blast furnace slag, 4040 mu gAs(V)/g.",
journal = "Journal of Chemistry",
title = "Arsenic Removal from Water Using Industrial By-Products",
doi = "10.1155/2013/121024"
}

Lekić, B. M., Markovic, D. D., Rajaković-Ognjanović, V. N., Đukić, A. R.,& Rajaković, L. V.. (2013). Arsenic Removal from Water Using Industrial By-Products. in Journal of Chemistry.
https://doi.org/10.1155/2013/121024

Lekić BM, Markovic DD, Rajaković-Ognjanović VN, Đukić AR, Rajaković LV. Arsenic Removal from Water Using Industrial By-Products. in Journal of Chemistry. 2013;.
doi:10.1155/2013/121024 .

Lekić, Branislava M., Markovic, Dana D., Rajaković-Ognjanović, Vladana N., Đukić, Aleksandar R., Rajaković, Ljubinka V., "Arsenic Removal from Water Using Industrial By-Products" in Journal of Chemistry (2013),
https://doi.org/10.1155/2013/121024 . .

TY  - JOUR
AU  - Rajaković, Ljubinka V.
AU  - Todorović, Žaklina
AU  - Rajaković-Ognjanović, Vladana N.
AU  - Onjia, Antonije E.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5759
AB  - Arsenic exists in the form of various chemical species differing in their physicochemical behaviour, toxicity, bioavailability and biotransformation. The determination of arsenic species is an important issue for environmental, clinical and food chemistry. However, differentiation of these species is a quite complex analytical task. Numerous speciation procedures have been studied that include electrochemical, chromatographic, spectrometric and hyphenated techniques. This review presents the relevant research in the field of arsenic speciation analysis with novel applications and significant advances. Stability of arsenic species and each of the analytical steps (sample collection, storage, preservation, extraction) of the arsenic speciation methods is particularly evaluated. Analytical validation and performance of these Methods are also reviewed.
T2  - Journal of the Serbian Chemical Society
T1  - Analytical methods for arsenic speciation analysis
VL  - 78
IS  - 10
SP  - 1461
EP  - 1479
DO  - 10.2298/JSC130315064R
ER  - 

@article{
author = "Rajaković, Ljubinka V. and Todorović, Žaklina and Rajaković-Ognjanović, Vladana N. and Onjia, Antonije E.",
year = "2013",
abstract = "Arsenic exists in the form of various chemical species differing in their physicochemical behaviour, toxicity, bioavailability and biotransformation. The determination of arsenic species is an important issue for environmental, clinical and food chemistry. However, differentiation of these species is a quite complex analytical task. Numerous speciation procedures have been studied that include electrochemical, chromatographic, spectrometric and hyphenated techniques. This review presents the relevant research in the field of arsenic speciation analysis with novel applications and significant advances. Stability of arsenic species and each of the analytical steps (sample collection, storage, preservation, extraction) of the arsenic speciation methods is particularly evaluated. Analytical validation and performance of these Methods are also reviewed.",
journal = "Journal of the Serbian Chemical Society",
title = "Analytical methods for arsenic speciation analysis",
volume = "78",
number = "10",
pages = "1461-1479",
doi = "10.2298/JSC130315064R"
}

Rajaković, L. V., Todorović, Ž., Rajaković-Ognjanović, V. N.,& Onjia, A. E.. (2013). Analytical methods for arsenic speciation analysis. in Journal of the Serbian Chemical Society, 78(10), 1461-1479.
https://doi.org/10.2298/JSC130315064R

Rajaković LV, Todorović Ž, Rajaković-Ognjanović VN, Onjia AE. Analytical methods for arsenic speciation analysis. in Journal of the Serbian Chemical Society. 2013;78(10):1461-1479.
doi:10.2298/JSC130315064R .

Rajaković, Ljubinka V., Todorović, Žaklina, Rajaković-Ognjanović, Vladana N., Onjia, Antonije E., "Analytical methods for arsenic speciation analysis" in Journal of the Serbian Chemical Society, 78, no. 10 (2013):1461-1479,
https://doi.org/10.2298/JSC130315064R . .

TY  - JOUR
AU  - Zivojinovic, Dragana Z.
AU  - Rajaković-Ognjanović, Vladana N.
AU  - Onjia, Antonije E.
AU  - Rajaković, Ljubinka V.
PY  - 2013
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5568
AB  - In this study, a multivariate statistical approach was used to identify the key variables responsible for process water quality in a power plant. The ion species that could cause corrosion in one of the major thermal power plants (TPP) in Serbia were monitored. A suppressed ion chromatographic (IC) method for the determination of the target anions and cations at trace levels was applied. In addition, some metals important for corrosion, i.e., copper and iron, were also analysed by the graphite furnace atomic absorption spectrophotometric (GFAAS) method. The control parameters, i.e., pH, dissolved oxygen and silica, were measured on-line. The analysis of a series of representative samples from the TPP Nikola Tesla, collected in different plant operation modes, was performed. Every day laboratory and on-line analysis provides a large number of data in relation to the quality of water in the water-steam cycle (WSC) which should be evaluated and processed. The goal of this investigation was to apply multivariate statistical techniques and choose the most applicable technique for this case. Factor analysis (FA), especially principal component analysis (PCA) and cluster analysis (CA) were investigated. These methods were applied for the evaluation of the spatial/temporal variations of process water and for the estimation of 13 quality parameters which were monitored at 11 locations in the WSC in different working conditions during a twelve month period. It was concluded that PCA was the most useful method for identifying functional relations between the elements. After data reduction, four main factors controlling the variability were identified. Hierarchical cluster analysis (HCA) was applied for sample differentiation according to the sample location and working mode of the TPP. On the basis of this research, the new design of an optimal monitoring strategy for future analysis was proposed with a reduced number of measured parameters and with reduced frequency of their measurements.
T2  - Central European Journal of Chemistry
T1  - Spatial variations in the distribution of trace ionic impurities in the water-steam cycle in a thermal power plant based on a multivariate statistical approach
VL  - 11
IS  - 9
SP  - 1456
EP  - 1470
DO  - 10.2478/s11532-013-0286-4
ER  - 

@article{
author = "Zivojinovic, Dragana Z. and Rajaković-Ognjanović, Vladana N. and Onjia, Antonije E. and Rajaković, Ljubinka V.",
year = "2013",
abstract = "In this study, a multivariate statistical approach was used to identify the key variables responsible for process water quality in a power plant. The ion species that could cause corrosion in one of the major thermal power plants (TPP) in Serbia were monitored. A suppressed ion chromatographic (IC) method for the determination of the target anions and cations at trace levels was applied. In addition, some metals important for corrosion, i.e., copper and iron, were also analysed by the graphite furnace atomic absorption spectrophotometric (GFAAS) method. The control parameters, i.e., pH, dissolved oxygen and silica, were measured on-line. The analysis of a series of representative samples from the TPP Nikola Tesla, collected in different plant operation modes, was performed. Every day laboratory and on-line analysis provides a large number of data in relation to the quality of water in the water-steam cycle (WSC) which should be evaluated and processed. The goal of this investigation was to apply multivariate statistical techniques and choose the most applicable technique for this case. Factor analysis (FA), especially principal component analysis (PCA) and cluster analysis (CA) were investigated. These methods were applied for the evaluation of the spatial/temporal variations of process water and for the estimation of 13 quality parameters which were monitored at 11 locations in the WSC in different working conditions during a twelve month period. It was concluded that PCA was the most useful method for identifying functional relations between the elements. After data reduction, four main factors controlling the variability were identified. Hierarchical cluster analysis (HCA) was applied for sample differentiation according to the sample location and working mode of the TPP. On the basis of this research, the new design of an optimal monitoring strategy for future analysis was proposed with a reduced number of measured parameters and with reduced frequency of their measurements.",
journal = "Central European Journal of Chemistry",
title = "Spatial variations in the distribution of trace ionic impurities in the water-steam cycle in a thermal power plant based on a multivariate statistical approach",
volume = "11",
number = "9",
pages = "1456-1470",
doi = "10.2478/s11532-013-0286-4"
}

Zivojinovic, D. Z., Rajaković-Ognjanović, V. N., Onjia, A. E.,& Rajaković, L. V.. (2013). Spatial variations in the distribution of trace ionic impurities in the water-steam cycle in a thermal power plant based on a multivariate statistical approach. in Central European Journal of Chemistry, 11(9), 1456-1470.
https://doi.org/10.2478/s11532-013-0286-4

Zivojinovic DZ, Rajaković-Ognjanović VN, Onjia AE, Rajaković LV. Spatial variations in the distribution of trace ionic impurities in the water-steam cycle in a thermal power plant based on a multivariate statistical approach. in Central European Journal of Chemistry. 2013;11(9):1456-1470.
doi:10.2478/s11532-013-0286-4 .

Zivojinovic, Dragana Z., Rajaković-Ognjanović, Vladana N., Onjia, Antonije E., Rajaković, Ljubinka V., "Spatial variations in the distribution of trace ionic impurities in the water-steam cycle in a thermal power plant based on a multivariate statistical approach" in Central European Journal of Chemistry, 11, no. 9 (2013):1456-1470,
https://doi.org/10.2478/s11532-013-0286-4 . .

TY  - JOUR
AU  - Rajaković, Ljubinka V.
AU  - Markovic, Dana D.
AU  - Rajaković-Ognjanović, Vladana N.
AU  - Antanasijević, Davor Z.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/5225
AB  - The analytical properties of an analytical method must be evaluated through validation protocols. Beside specificity and/or selectivity, linearity of calibration, repeatability and accuracy, the most important parameters are: LOD (limit of detection) and LOQ (limit of quantification). Through these limits, it is possible to define the smallest concentration of analyte that can be reliably detected and quantified. To establish these limits, an analyst should apply several estimation methods and test a large number of sample replicates. It is difficult to make a compromise between complex statistical programs and the simple analytical demand to have reliable analytical parameters. The differences and equivalency of estimation methods and approaches for analytical limits could be overcome by an experimental comparison. In this paper, the focus is the LOD of inductively coupled plasma-mass spectrometry (ICP-MS) measurements employed for the determination of arsenic. The current approaches for the calculation of the LOD are summarized and critically discussed. (C) 2012 Elsevier B.V. All rights reserved.
T2  - Talanta
T1  - Review: The approaches for estimation of limit of detection for ICP-MS trace analysis of arsenic
VL  - 102
IS  - SI
SP  - 79
EP  - 87
DO  - 10.1016/j.talanta.2012.08.016
ER  - 

@article{
author = "Rajaković, Ljubinka V. and Markovic, Dana D. and Rajaković-Ognjanović, Vladana N. and Antanasijević, Davor Z.",
year = "2012",
abstract = "The analytical properties of an analytical method must be evaluated through validation protocols. Beside specificity and/or selectivity, linearity of calibration, repeatability and accuracy, the most important parameters are: LOD (limit of detection) and LOQ (limit of quantification). Through these limits, it is possible to define the smallest concentration of analyte that can be reliably detected and quantified. To establish these limits, an analyst should apply several estimation methods and test a large number of sample replicates. It is difficult to make a compromise between complex statistical programs and the simple analytical demand to have reliable analytical parameters. The differences and equivalency of estimation methods and approaches for analytical limits could be overcome by an experimental comparison. In this paper, the focus is the LOD of inductively coupled plasma-mass spectrometry (ICP-MS) measurements employed for the determination of arsenic. The current approaches for the calculation of the LOD are summarized and critically discussed. (C) 2012 Elsevier B.V. All rights reserved.",
journal = "Talanta",
title = "Review: The approaches for estimation of limit of detection for ICP-MS trace analysis of arsenic",
volume = "102",
number = "SI",
pages = "79-87",
doi = "10.1016/j.talanta.2012.08.016"
}

Rajaković, L. V., Markovic, D. D., Rajaković-Ognjanović, V. N.,& Antanasijević, D. Z.. (2012). Review: The approaches for estimation of limit of detection for ICP-MS trace analysis of arsenic. in Talanta, 102(SI), 79-87.
https://doi.org/10.1016/j.talanta.2012.08.016

Rajaković LV, Markovic DD, Rajaković-Ognjanović VN, Antanasijević DZ. Review: The approaches for estimation of limit of detection for ICP-MS trace analysis of arsenic. in Talanta. 2012;102(SI):79-87.
doi:10.1016/j.talanta.2012.08.016 .

Rajaković, Ljubinka V., Markovic, Dana D., Rajaković-Ognjanović, Vladana N., Antanasijević, Davor Z., "Review: The approaches for estimation of limit of detection for ICP-MS trace analysis of arsenic" in Talanta, 102, no. SI (2012):79-87,
https://doi.org/10.1016/j.talanta.2012.08.016 . .