TY  - JOUR
AU  - Karanac, Milica
AU  - Dolić, Maja B.
AU  - Veljović, Đorđe
AU  - Rajaković-Ognjanović, Vladana
AU  - Veličković, Zlate
AU  - Pavićević, Vladimir
AU  - Marinković, Aleksandar
PY  - 2018
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/937
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 (pH(pzc), 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.
PB  - Elsevier Ltd
T2  - Waste Management
T1  - The removal of Zn2+, Pb2+, and As(V) ions by lime activated fly ash and valorization of the exhausted adsorbent
EP  - 378
SP  - 366
VL  - 78
DO  - 10.1016/j.wasman.2018.05.052
ER  - 

@article{
author = "Karanac, Milica and Dolić, Maja B. and Veljović, Đorđe and Rajaković-Ognjanović, Vladana and Veličković, Zlate and Pavićević, Vladimir and Marinković, Aleksandar",
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 (pH(pzc), 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.",
publisher = "Elsevier Ltd",
journal = "Waste Management",
title = "The removal of Zn2+, Pb2+, and As(V) ions by lime activated fly ash and valorization of the exhausted adsorbent",
pages = "378-366",
volume = "78",
doi = "10.1016/j.wasman.2018.05.052"
}

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

Karanac M, Dolić MB, Veljović Đ, Rajaković-Ognjanović V, Veličković Z, Pavićević V, Marinković A. 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, Dolić, Maja B., Veljović, Đorđe, Rajaković-Ognjanović, Vladana, Veličković, Zlate, Pavićević, Vladimir, Marinković, Aleksandar, "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  - Đukić, Aleksandar
AU  - Lekić, Branislava
AU  - Rajaković-Ognjanović, Vladana
AU  - Veljović, Đorđe
AU  - Vulić, Tatjana
AU  - Đolić, Maja
AU  - Naunović, Zorana
AU  - Despotović, Jovan
AU  - Prodanović, Dušan
PY  - 2016
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/765
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.
PB  - Academic Press
T2  - Journal of Environmental Management
T1  - Further insight into the mechanism of heavy metals partitioning in stormwater runoff
EP  - 110
SP  - 104
VL  - 168
DO  - 10.1016/j.jenvman.2015.11.035
ER  - 

@article{
author = "Đukić, Aleksandar and Lekić, Branislava and Rajaković-Ognjanović, Vladana and Veljović, Đorđe and Vulić, Tatjana and Đolić, Maja and Naunović, Zorana and Despotović, Jovan and Prodanović, Dušan",
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.",
publisher = "Academic Press",
journal = "Journal of Environmental Management",
title = "Further insight into the mechanism of heavy metals partitioning in stormwater runoff",
pages = "110-104",
volume = "168",
doi = "10.1016/j.jenvman.2015.11.035"
}

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

Đukić A, Lekić B, Rajaković-Ognjanović V, Veljović Đ, Vulić T, Đolić M, Naunović Z, Despotović J, Prodanović D. 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, Rajaković-Ognjanović, Vladana, Veljović, Đorđe, Vulić, Tatjana, Đolić, Maja, Naunović, Zorana, Despotović, Jovan, Prodanović, Dušan, "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  - Dolić, Maja B.
AU  - Rajaković-Ognjanović, Vladana
AU  - Štrbac, Svetlana B.
AU  - Rakočević, Zlatko Lj.
AU  - Veljović, Đorđe
AU  - Dimitrijević, Suzana I.
AU  - Rajaković, Ljubinka V.
PY  - 2015
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/723
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.
PB  - Elsevier B.V.
T2  - Applied Surface Science
T1  - The antimicrobial efficiency of silver activated sorbents
EP  - 831
SP  - 819
VL  - 357
DO  - 10.1016/j.apsusc.2015.09.032
ER  - 

@article{
author = "Dolić, Maja B. and Rajaković-Ognjanović, Vladana and Štrbac, Svetlana B. and Rakočević, Zlatko Lj. and Veljović, Đorđe 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.",
publisher = "Elsevier B.V.",
journal = "Applied Surface Science",
title = "The antimicrobial efficiency of silver activated sorbents",
pages = "831-819",
volume = "357",
doi = "10.1016/j.apsusc.2015.09.032"
}

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

Dolić MB, Rajaković-Ognjanović V, Štrbac SB, Rakočević ZL, Veljović Đ, 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 .

Dolić, Maja B., Rajaković-Ognjanović, Vladana, Štrbac, Svetlana B., Rakočević, Zlatko Lj., Veljović, Đorđe, 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 . .