TY  - JOUR
AU  - Kragović, Milan
AU  - Stojmenović, Marija
AU  - Ristić, Nenad
AU  - Milićević, Sonja
AU  - Živković, Sanja
AU  - Liu, Shanke
AU  - Gulicovski, Jelena
PY  - 2022
UR  - https://ritnms.itnms.ac.rs/handle/123456789/612
AB  - Solving problems with hazardous waste materials is of crucial importance today. In the presented study, the application of waste vitreous enamel as a cement replacement up to 30% in mortar and concrete production was investigated. The chemical and physical-chemical characterization of the starting material was performed, as well as a leaching test and physical-mechanical characterization of mortar and concrete mixes. Obtained results showed that, due to its chemical composition, the vitreous enamel used must be classified as hazardous waste. At the same time, it possesses pozzolanic properties and satisfies minimal criteria for use as a cement replacement. Testing mortars and concrete mixes indicate that waste vitreous enamel can be applied as a construction material for cement replacement in the maximal amount of 20%. The leaching test was performed in accordance with international standard EN 12457-2 on hardened mortar with a maximal cement replacement of 20%. The results showed that there was no significant release of toxic elements, i.e., that the practical application of hazardous waste vitreous enamel in the construction industry may be fully in line with environmental standards.
PB  - MDPI, Basel
T2  - Buildings
T1  - Application of the Hazardous Waste Vitreous Enamel Generated in the Production Process of Heating Devices as a Partial Replacement for Cement
IS  - 8
VL  - 12
DO  - 10.3390/buildings12081287
UR  - conv_951
ER  - 

@article{
author = "Kragović, Milan and Stojmenović, Marija and Ristić, Nenad and Milićević, Sonja and Živković, Sanja and Liu, Shanke and Gulicovski, Jelena",
year = "2022",
abstract = "Solving problems with hazardous waste materials is of crucial importance today. In the presented study, the application of waste vitreous enamel as a cement replacement up to 30% in mortar and concrete production was investigated. The chemical and physical-chemical characterization of the starting material was performed, as well as a leaching test and physical-mechanical characterization of mortar and concrete mixes. Obtained results showed that, due to its chemical composition, the vitreous enamel used must be classified as hazardous waste. At the same time, it possesses pozzolanic properties and satisfies minimal criteria for use as a cement replacement. Testing mortars and concrete mixes indicate that waste vitreous enamel can be applied as a construction material for cement replacement in the maximal amount of 20%. The leaching test was performed in accordance with international standard EN 12457-2 on hardened mortar with a maximal cement replacement of 20%. The results showed that there was no significant release of toxic elements, i.e., that the practical application of hazardous waste vitreous enamel in the construction industry may be fully in line with environmental standards.",
publisher = "MDPI, Basel",
journal = "Buildings",
title = "Application of the Hazardous Waste Vitreous Enamel Generated in the Production Process of Heating Devices as a Partial Replacement for Cement",
number = "8",
volume = "12",
doi = "10.3390/buildings12081287",
url = "conv_951"
}

Kragović, M., Stojmenović, M., Ristić, N., Milićević, S., Živković, S., Liu, S.,& Gulicovski, J.. (2022). Application of the Hazardous Waste Vitreous Enamel Generated in the Production Process of Heating Devices as a Partial Replacement for Cement. in Buildings
MDPI, Basel., 12(8).
https://doi.org/10.3390/buildings12081287
conv_951

Kragović M, Stojmenović M, Ristić N, Milićević S, Živković S, Liu S, Gulicovski J. Application of the Hazardous Waste Vitreous Enamel Generated in the Production Process of Heating Devices as a Partial Replacement for Cement. in Buildings. 2022;12(8).
doi:10.3390/buildings12081287
conv_951 .

Kragović, Milan, Stojmenović, Marija, Ristić, Nenad, Milićević, Sonja, Živković, Sanja, Liu, Shanke, Gulicovski, Jelena, "Application of the Hazardous Waste Vitreous Enamel Generated in the Production Process of Heating Devices as a Partial Replacement for Cement" in Buildings, 12, no. 8 (2022),
https://doi.org/10.3390/buildings12081287 .,
conv_951 .

TY  - CONF
AU  - Milićević, Sonja
AU  - Martinović, Sanja
AU  - Vlahović, Milica
AU  - Jovanović, Vladimir
AU  - Šešlija, Sanja
AU  - Savić, Aleksandar
AU  - Kragović, Milan
PY  - 2021
UR  - https://ritnms.itnms.ac.rs/handle/123456789/1086
AB  - The increasing levels of industrial wastewater that are released to the environment present a serious
threat to human health, living resources, and ecological systems. Fly ash was tested for removal of Cu2+ from
contaminated water in in a micronized and pelletized form. Experiments were performed for wide range of initial
concentration of Cu 25-600 mg dm-3. Pellets fraction size was 2.0-3.5 mm, while the content of cement, as a binder
was 10%. Under applied experimental conditions pellets manifested exceptional adsorption capacity (25.64 mg/g)
that was three times higher compared to the micronized fly ash (8.85 mg/g).
PB  - Belgrade : University of Belgrade, Faculty of Mining and Geology
C3  - 8th International Conference MINING AND ENVIRONMENTAL PROTECTION
T1  - Copper removal by pelletized fly ash
EP  - 42
SP  - 39
ER  - 

@conference{
author = "Milićević, Sonja and Martinović, Sanja and Vlahović, Milica and Jovanović, Vladimir and Šešlija, Sanja and Savić, Aleksandar and Kragović, Milan",
year = "2021",
abstract = "The increasing levels of industrial wastewater that are released to the environment present a serious
threat to human health, living resources, and ecological systems. Fly ash was tested for removal of Cu2+ from
contaminated water in in a micronized and pelletized form. Experiments were performed for wide range of initial
concentration of Cu 25-600 mg dm-3. Pellets fraction size was 2.0-3.5 mm, while the content of cement, as a binder
was 10%. Under applied experimental conditions pellets manifested exceptional adsorption capacity (25.64 mg/g)
that was three times higher compared to the micronized fly ash (8.85 mg/g).",
publisher = "Belgrade : University of Belgrade, Faculty of Mining and Geology",
journal = "8th International Conference MINING AND ENVIRONMENTAL PROTECTION",
title = "Copper removal by pelletized fly ash",
pages = "42-39"
}

Milićević, S., Martinović, S., Vlahović, M., Jovanović, V., Šešlija, S., Savić, A.,& Kragović, M.. (2021). Copper removal by pelletized fly ash. in 8th International Conference MINING AND ENVIRONMENTAL PROTECTION
Belgrade : University of Belgrade, Faculty of Mining and Geology., 39-42.

Milićević S, Martinović S, Vlahović M, Jovanović V, Šešlija S, Savić A, Kragović M. Copper removal by pelletized fly ash. in 8th International Conference MINING AND ENVIRONMENTAL PROTECTION. 2021;:39-42..

Milićević, Sonja, Martinović, Sanja, Vlahović, Milica, Jovanović, Vladimir, Šešlija, Sanja, Savić, Aleksandar, Kragović, Milan, "Copper removal by pelletized fly ash" in 8th International Conference MINING AND ENVIRONMENTAL PROTECTION (2021):39-42.

TY  - JOUR
AU  - Nedeljković, Andrijana
AU  - Stojmenović, Marija
AU  - Gulicovski, Jelena
AU  - Ristić, Nenad
AU  - Milićević, Sonja
AU  - Krstić, Jugoslav
AU  - Kragović, Milan
PY  - 2020
UR  - https://ritnms.itnms.ac.rs/handle/123456789/543
AB  - Numerous factors influence the complexity of environmental and waste management problems, and the most significant goal is the reuse of materials that have completed their "life cycle" and the reduction in the use of new resources. In order to reduce impact of waste slag on the environment, in the present study, waste slag, generated in heating plants after lignite combustion, was characterized in detail and tested for application as a replacement for cement in mortar or concrete production. For physical-chemical characterization of slag, different experimental and instrumental techniques were used such as chemical composition and determination of the content of heavy metals, investigation of morphological and textural properties, thermal analysis, X-ray, and infrared spectroscopy. Physical-mechanical characterization of slag was also performed and included determination of activity index, water requirement, setting time and soundness. A leaching test was also performed. Presented results show that waste slag may be used in mortar and concrete production as a partial cement replacement, but after additional combustion at 650 degrees C and partial replacement of slag with silica fume in the minimal amount of 12%. The maximal obtained cement replacement was 20% (17.8% slag and 2.2% of silica fume).
PB  - MDPI, Basel
T2  - Minerals
T1  - Waste Slag from Heating Plants as a Partial Replacement for Cement in Mortar and Concrete Production. Part I-Physical-Chemical and Physical-Mechanical Characterization of Slag
IS  - 11
VL  - 10
DO  - 10.3390/min10110992
UR  - conv_896
ER  - 

@article{
author = "Nedeljković, Andrijana and Stojmenović, Marija and Gulicovski, Jelena and Ristić, Nenad and Milićević, Sonja and Krstić, Jugoslav and Kragović, Milan",
year = "2020",
abstract = "Numerous factors influence the complexity of environmental and waste management problems, and the most significant goal is the reuse of materials that have completed their "life cycle" and the reduction in the use of new resources. In order to reduce impact of waste slag on the environment, in the present study, waste slag, generated in heating plants after lignite combustion, was characterized in detail and tested for application as a replacement for cement in mortar or concrete production. For physical-chemical characterization of slag, different experimental and instrumental techniques were used such as chemical composition and determination of the content of heavy metals, investigation of morphological and textural properties, thermal analysis, X-ray, and infrared spectroscopy. Physical-mechanical characterization of slag was also performed and included determination of activity index, water requirement, setting time and soundness. A leaching test was also performed. Presented results show that waste slag may be used in mortar and concrete production as a partial cement replacement, but after additional combustion at 650 degrees C and partial replacement of slag with silica fume in the minimal amount of 12%. The maximal obtained cement replacement was 20% (17.8% slag and 2.2% of silica fume).",
publisher = "MDPI, Basel",
journal = "Minerals",
title = "Waste Slag from Heating Plants as a Partial Replacement for Cement in Mortar and Concrete Production. Part I-Physical-Chemical and Physical-Mechanical Characterization of Slag",
number = "11",
volume = "10",
doi = "10.3390/min10110992",
url = "conv_896"
}

Nedeljković, A., Stojmenović, M., Gulicovski, J., Ristić, N., Milićević, S., Krstić, J.,& Kragović, M.. (2020). Waste Slag from Heating Plants as a Partial Replacement for Cement in Mortar and Concrete Production. Part I-Physical-Chemical and Physical-Mechanical Characterization of Slag. in Minerals
MDPI, Basel., 10(11).
https://doi.org/10.3390/min10110992
conv_896

Nedeljković A, Stojmenović M, Gulicovski J, Ristić N, Milićević S, Krstić J, Kragović M. Waste Slag from Heating Plants as a Partial Replacement for Cement in Mortar and Concrete Production. Part I-Physical-Chemical and Physical-Mechanical Characterization of Slag. in Minerals. 2020;10(11).
doi:10.3390/min10110992
conv_896 .

Nedeljković, Andrijana, Stojmenović, Marija, Gulicovski, Jelena, Ristić, Nenad, Milićević, Sonja, Krstić, Jugoslav, Kragović, Milan, "Waste Slag from Heating Plants as a Partial Replacement for Cement in Mortar and Concrete Production. Part I-Physical-Chemical and Physical-Mechanical Characterization of Slag" in Minerals, 10, no. 11 (2020),
https://doi.org/10.3390/min10110992 .,
conv_896 .

TY  - JOUR
AU  - Milićević, Sonja
AU  - Vlahović, Milica
AU  - Kragović, Milan
AU  - Martinović, Sanja
AU  - Milošević, Vladan
AU  - Jovanović, Ivana
AU  - Stojmenović, Marija
PY  - 2020
UR  - https://ritnms.itnms.ac.rs/handle/123456789/536
AB  - The intent in this paper is to define how the batch equilibrium results of copper removal from a synthetic solution on natural zeolite can be used for prediction of the breakthrough curves in the fixed-bed system for both a synthetic solution and wastewater. Natural zeolite from the Vranjska Banja deposit, Serbia, has been fully characterized (XRD, chemical composition, DTA/TG, SEM/EDS) as a clinoptilolite with cation exchange capacity of 146 meq/100 g. The maximum adsorption capacity (q(m)) in the batch of the mono-component system (synthetic copper solution) obtained using the Langmuir isotherm model was 7.30 and 6.10 mg/g for particle size below 0.043 and 0.6-0.8 mm, respectively. Using the flow-through system with the 0.6-0.8 mm zeolite fixed-bed, almost double the adsorption capacity (11.2-12.2 mg/g) has been achieved in a saturation point for the copper removal from the synthetic solution, compared to the batch. Better results are attributed to the constant high concentration gradient in flow-through systems compared to the batch. The complex composition of wastewater and large amounts of earth alkaline metals disturb free adsorption sights on the zeolite surface. This results in a less effective adsorption in flow-through systems with adsorption capacity in breakthrough point of 5.84 mg/g (similar to 0.95 x qm) and in a saturation point of 7.10 mg/g (similar to 1.15 x qm).
PB  - MDPI, Basel
T2  - Minerals
T1  - Removal of Copper from Mining Wastewater Using Natural Raw Material-Comparative Study between the Synthetic and Natural Wastewater Samples
IS  - 9
VL  - 10
DO  - 10.3390/min10090753
UR  - conv_894
ER  - 

@article{
author = "Milićević, Sonja and Vlahović, Milica and Kragović, Milan and Martinović, Sanja and Milošević, Vladan and Jovanović, Ivana and Stojmenović, Marija",
year = "2020",
abstract = "The intent in this paper is to define how the batch equilibrium results of copper removal from a synthetic solution on natural zeolite can be used for prediction of the breakthrough curves in the fixed-bed system for both a synthetic solution and wastewater. Natural zeolite from the Vranjska Banja deposit, Serbia, has been fully characterized (XRD, chemical composition, DTA/TG, SEM/EDS) as a clinoptilolite with cation exchange capacity of 146 meq/100 g. The maximum adsorption capacity (q(m)) in the batch of the mono-component system (synthetic copper solution) obtained using the Langmuir isotherm model was 7.30 and 6.10 mg/g for particle size below 0.043 and 0.6-0.8 mm, respectively. Using the flow-through system with the 0.6-0.8 mm zeolite fixed-bed, almost double the adsorption capacity (11.2-12.2 mg/g) has been achieved in a saturation point for the copper removal from the synthetic solution, compared to the batch. Better results are attributed to the constant high concentration gradient in flow-through systems compared to the batch. The complex composition of wastewater and large amounts of earth alkaline metals disturb free adsorption sights on the zeolite surface. This results in a less effective adsorption in flow-through systems with adsorption capacity in breakthrough point of 5.84 mg/g (similar to 0.95 x qm) and in a saturation point of 7.10 mg/g (similar to 1.15 x qm).",
publisher = "MDPI, Basel",
journal = "Minerals",
title = "Removal of Copper from Mining Wastewater Using Natural Raw Material-Comparative Study between the Synthetic and Natural Wastewater Samples",
number = "9",
volume = "10",
doi = "10.3390/min10090753",
url = "conv_894"
}

Milićević, S., Vlahović, M., Kragović, M., Martinović, S., Milošević, V., Jovanović, I.,& Stojmenović, M.. (2020). Removal of Copper from Mining Wastewater Using Natural Raw Material-Comparative Study between the Synthetic and Natural Wastewater Samples. in Minerals
MDPI, Basel., 10(9).
https://doi.org/10.3390/min10090753
conv_894

Milićević S, Vlahović M, Kragović M, Martinović S, Milošević V, Jovanović I, Stojmenović M. Removal of Copper from Mining Wastewater Using Natural Raw Material-Comparative Study between the Synthetic and Natural Wastewater Samples. in Minerals. 2020;10(9).
doi:10.3390/min10090753
conv_894 .

Milićević, Sonja, Vlahović, Milica, Kragović, Milan, Martinović, Sanja, Milošević, Vladan, Jovanović, Ivana, Stojmenović, Marija, "Removal of Copper from Mining Wastewater Using Natural Raw Material-Comparative Study between the Synthetic and Natural Wastewater Samples" in Minerals, 10, no. 9 (2020),
https://doi.org/10.3390/min10090753 .,
conv_894 .

TY  - CONF
AU  - Kragović, Milan
AU  - Stojmenović, Marija
AU  - Petrović, Jelena
AU  - Loredo, Jorge
AU  - Pasalić, Snežana
AU  - Nedeljković, Andrijana
AU  - Ristović, Ivica
PY  - 2019
UR  - https://ritnms.itnms.ac.rs/handle/123456789/497
AB  - In this paper influence of alginate encapsulation on point of zero charge (pH(pzc)) and thermodynamic properties of the natural and Fe(III)-modified zeolite were investigated. The pH(pzc) was determined by using 0.1000 g of the samples and 50 cm(3) of the solution containing KNO3 in concentrations of 0.0001-0.01 mol/dm(3) for initial pH (pH(i)) in range between 2 and 12. The obtained pH(pzc) were 6.2 for natural (NZA) and 6.5 for modified zeolite encapsulated with alginate (FeA). Influence of the temperature on the adsorption of lead was investigated for different initial lead ions concentrations (180-3200 mgPb(2+)/dm(3)) and temperatures of 30, 40 and 60 degrees C. For both adsorbents, adsorption of lead ions increased with increasing its initial concentration as well as with increasing of the temperature. Also, the best fits of the experimental data were obtained by Freundlich isotherm. The temperature had positive influence adsorption and removal of lead ions increased with increasing its initial concentration as well as with increasing of the temperature. The thermodynamic parameters (the standard free energy of adsorption, standard enthalpy and standard entropy) were also determined. The results showed that lead ions removal from aqueous solutions is much favourable for FeA then NZA.
PB  - Elsevier Science Bv, Amsterdam
C3  - 12th International Conference Interdisciplinarity in Engineering (Inter-Eng 2018)
T1  - Influence of Alginate Encapsulation on Point of Zero Charge (pH(pzc)) and Thermodynamic Properties of the Natural and Fe(III) Modified Zeolite
EP  - 293
SP  - 286
VL  - 32
DO  - 10.1016/j.promfg.2019.02.216
UR  - conv_854
ER  - 

@conference{
author = "Kragović, Milan and Stojmenović, Marija and Petrović, Jelena and Loredo, Jorge and Pasalić, Snežana and Nedeljković, Andrijana and Ristović, Ivica",
year = "2019",
abstract = "In this paper influence of alginate encapsulation on point of zero charge (pH(pzc)) and thermodynamic properties of the natural and Fe(III)-modified zeolite were investigated. The pH(pzc) was determined by using 0.1000 g of the samples and 50 cm(3) of the solution containing KNO3 in concentrations of 0.0001-0.01 mol/dm(3) for initial pH (pH(i)) in range between 2 and 12. The obtained pH(pzc) were 6.2 for natural (NZA) and 6.5 for modified zeolite encapsulated with alginate (FeA). Influence of the temperature on the adsorption of lead was investigated for different initial lead ions concentrations (180-3200 mgPb(2+)/dm(3)) and temperatures of 30, 40 and 60 degrees C. For both adsorbents, adsorption of lead ions increased with increasing its initial concentration as well as with increasing of the temperature. Also, the best fits of the experimental data were obtained by Freundlich isotherm. The temperature had positive influence adsorption and removal of lead ions increased with increasing its initial concentration as well as with increasing of the temperature. The thermodynamic parameters (the standard free energy of adsorption, standard enthalpy and standard entropy) were also determined. The results showed that lead ions removal from aqueous solutions is much favourable for FeA then NZA.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "12th International Conference Interdisciplinarity in Engineering (Inter-Eng 2018)",
title = "Influence of Alginate Encapsulation on Point of Zero Charge (pH(pzc)) and Thermodynamic Properties of the Natural and Fe(III) Modified Zeolite",
pages = "293-286",
volume = "32",
doi = "10.1016/j.promfg.2019.02.216",
url = "conv_854"
}

Kragović, M., Stojmenović, M., Petrović, J., Loredo, J., Pasalić, S., Nedeljković, A.,& Ristović, I.. (2019). Influence of Alginate Encapsulation on Point of Zero Charge (pH(pzc)) and Thermodynamic Properties of the Natural and Fe(III) Modified Zeolite. in 12th International Conference Interdisciplinarity in Engineering (Inter-Eng 2018)
Elsevier Science Bv, Amsterdam., 32, 286-293.
https://doi.org/10.1016/j.promfg.2019.02.216
conv_854

Kragović M, Stojmenović M, Petrović J, Loredo J, Pasalić S, Nedeljković A, Ristović I. Influence of Alginate Encapsulation on Point of Zero Charge (pH(pzc)) and Thermodynamic Properties of the Natural and Fe(III) Modified Zeolite. in 12th International Conference Interdisciplinarity in Engineering (Inter-Eng 2018). 2019;32:286-293.
doi:10.1016/j.promfg.2019.02.216
conv_854 .

Kragović, Milan, Stojmenović, Marija, Petrović, Jelena, Loredo, Jorge, Pasalić, Snežana, Nedeljković, Andrijana, Ristović, Ivica, "Influence of Alginate Encapsulation on Point of Zero Charge (pH(pzc)) and Thermodynamic Properties of the Natural and Fe(III) Modified Zeolite" in 12th International Conference Interdisciplinarity in Engineering (Inter-Eng 2018), 32 (2019):286-293,
https://doi.org/10.1016/j.promfg.2019.02.216 .,
conv_854 .

TY  - JOUR
AU  - Kašić, Vladan
AU  - Mihajlović, Slavica
AU  - Životić, Dragana
AU  - Simić, Vladimir
AU  - Stojanović, Jovica
AU  - Sekulić, Živko
AU  - Kragović, Milan
PY  - 2018
UR  - https://ritnms.itnms.ac.rs/handle/123456789/464
AB  - This study presents investigations of zeolitic tuff samples from the “Igroš--Vidojevići” deposit. The aim of the research was to determine the quality of samples taken from all deposit parts. Thus, samples were taken from the footwall (“Zeolit 1”), and four samples from the central deposit part (“Zeolit 2”, “Zeolit 3”, “Zeolit 4” and “Zeolit 5”). Characterization of the samples included chemical analysis, determination of the adsorption coefficient for methylene blue dye and cation-exchange capacity (CEC), X-ray powder diffraction analysis (XRPD), differential thermal and thermogravimetric analysis (DTA and TGA), and Fourier transform Infrared spectroscopic analysis (FTIR). Results have shown that the footwall consists mostly of clays, whereas zeolite minerals dominate in the rest of the deposit. XRD analysis of the “Zeolit 1” sample confirmed presence of smectite and kaolinite clays, while zeolite of analcime type and quartz are present as smaller fractions. Chemical composition analysis and determination of heavy metal contents showed a significant amount (7.58%) of Fe2 O3 in this sample. Therefore, further research can be pursued to find a method for removal of magnetic impurities in this deposit portion in order to utilize the clay fraction. On the other hand, according to XRD, FTIR, DTA/TGA and SEM/EDS analyses, samples which belong to the central deposit part (“Zeolit 2–5”) consist of clinoptilolite zeolite type, while clays are present in less than 10%. Thus, clays (smectites and kaolinite) accompanied with analcime and quartz are the most abundant footwall minerals while central deposit parts contain predominantly clinoptilolite accompanied with small amounts of clays. Mineragenetically, zeolites are most abundant in the “Zeolit 2” and “Zeolit 3” samples. The smallest value of CEC was determined for the “Zeolit 1” sample (46.98 mmol/100g). According to CEC values determined for “Zeolit 2” and “Zeolit 3” (141.99 and 121.01 mmol/100 g, respect-ively) these samples are of the best quality, and could be utilized as adsorbents of inorganic pollutants from contaminated waters. Moreover, they could be potentially used for removal of mycotoxins from cattle feed. “Zeolit 4” and “Zeolit 5” samples have shown slightly lower CEC values (89.48 and 83.75 mmol/100 g, respectively), which implies lower quality, and, therefore, could be used for soil quality improvement. Finally, determination of the external CEC has revealed a significant difference between “Zeolit 1” and “Zeolit 5” samples (17.9 and 5.31 mmol/100 g, respectively).
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska industrija
T1  - Characterization of the zeolitic tuff from the “igroš-vidojevići” deposit regarding geological and technological aspects
EP  - 37
IS  - 1
SP  - 29
VL  - 72
DO  - 10.2298/HEMIND170428015K
UR  - conv_1030
ER  - 

@article{
author = "Kašić, Vladan and Mihajlović, Slavica and Životić, Dragana and Simić, Vladimir and Stojanović, Jovica and Sekulić, Živko and Kragović, Milan",
year = "2018",
abstract = "This study presents investigations of zeolitic tuff samples from the “Igroš--Vidojevići” deposit. The aim of the research was to determine the quality of samples taken from all deposit parts. Thus, samples were taken from the footwall (“Zeolit 1”), and four samples from the central deposit part (“Zeolit 2”, “Zeolit 3”, “Zeolit 4” and “Zeolit 5”). Characterization of the samples included chemical analysis, determination of the adsorption coefficient for methylene blue dye and cation-exchange capacity (CEC), X-ray powder diffraction analysis (XRPD), differential thermal and thermogravimetric analysis (DTA and TGA), and Fourier transform Infrared spectroscopic analysis (FTIR). Results have shown that the footwall consists mostly of clays, whereas zeolite minerals dominate in the rest of the deposit. XRD analysis of the “Zeolit 1” sample confirmed presence of smectite and kaolinite clays, while zeolite of analcime type and quartz are present as smaller fractions. Chemical composition analysis and determination of heavy metal contents showed a significant amount (7.58%) of Fe2 O3 in this sample. Therefore, further research can be pursued to find a method for removal of magnetic impurities in this deposit portion in order to utilize the clay fraction. On the other hand, according to XRD, FTIR, DTA/TGA and SEM/EDS analyses, samples which belong to the central deposit part (“Zeolit 2–5”) consist of clinoptilolite zeolite type, while clays are present in less than 10%. Thus, clays (smectites and kaolinite) accompanied with analcime and quartz are the most abundant footwall minerals while central deposit parts contain predominantly clinoptilolite accompanied with small amounts of clays. Mineragenetically, zeolites are most abundant in the “Zeolit 2” and “Zeolit 3” samples. The smallest value of CEC was determined for the “Zeolit 1” sample (46.98 mmol/100g). According to CEC values determined for “Zeolit 2” and “Zeolit 3” (141.99 and 121.01 mmol/100 g, respect-ively) these samples are of the best quality, and could be utilized as adsorbents of inorganic pollutants from contaminated waters. Moreover, they could be potentially used for removal of mycotoxins from cattle feed. “Zeolit 4” and “Zeolit 5” samples have shown slightly lower CEC values (89.48 and 83.75 mmol/100 g, respectively), which implies lower quality, and, therefore, could be used for soil quality improvement. Finally, determination of the external CEC has revealed a significant difference between “Zeolit 1” and “Zeolit 5” samples (17.9 and 5.31 mmol/100 g, respectively).",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska industrija",
title = "Characterization of the zeolitic tuff from the “igroš-vidojevići” deposit regarding geological and technological aspects",
pages = "37-29",
number = "1",
volume = "72",
doi = "10.2298/HEMIND170428015K",
url = "conv_1030"
}

Kašić, V., Mihajlović, S., Životić, D., Simić, V., Stojanović, J., Sekulić, Ž.,& Kragović, M.. (2018). Characterization of the zeolitic tuff from the “igroš-vidojevići” deposit regarding geological and technological aspects. in Hemijska industrija
Savez hemijskih inženjera, Beograd., 72(1), 29-37.
https://doi.org/10.2298/HEMIND170428015K
conv_1030

Kašić V, Mihajlović S, Životić D, Simić V, Stojanović J, Sekulić Ž, Kragović M. Characterization of the zeolitic tuff from the “igroš-vidojevići” deposit regarding geological and technological aspects. in Hemijska industrija. 2018;72(1):29-37.
doi:10.2298/HEMIND170428015K
conv_1030 .

Kašić, Vladan, Mihajlović, Slavica, Životić, Dragana, Simić, Vladimir, Stojanović, Jovica, Sekulić, Živko, Kragović, Milan, "Characterization of the zeolitic tuff from the “igroš-vidojevići” deposit regarding geological and technological aspects" in Hemijska industrija, 72, no. 1 (2018):29-37,
https://doi.org/10.2298/HEMIND170428015K .,
conv_1030 .

TY  - JOUR
AU  - Kragović, Milan
AU  - Pasalić, Snežana
AU  - Marković, Marija
AU  - Petrović, Marija
AU  - Nedeljković, Blagoje
AU  - Momcilović, Miloš
AU  - Stojmenović, Marija
PY  - 2018
UR  - https://ritnms.itnms.ac.rs/handle/123456789/461
AB  - In present paper, the influence of the initial pH and concentration of Pb2+ on its adsorption by the natural (NZA) and Fe(III)-modified zeolite-alginate beads (FeA) was studied. Results showed that modification of the starting materials have a positive effect on their adsorption capacities (102 and 136 mg/g for the NZA and FeA, respectively). After encapsulation, the mechanism of lead adsorption by both adsorbents was changed and ion exchange dominates. The best adsorption was achieved for initial pH > 3.8. Cation exchange capacity, structural properties, and hydrophobicity of samples were also determined, and the presence of the alginate has no significant influence on investigated properties of samples. Experiments on wastewater from tailings of lead and zinc mine Grot, Serbia, showed that after treatment with both adsorbents, the content of the most abundant heavy metals (Pb, Zn, Hg, and Mn) significantly decreased.
PB  - MDPI, Basel
T2  - Minerals
T1  - Natural and Modified Zeolite-Alginate Composites. Application for Removal of Heavy Metal Cations from Contaminated Water Solutions
IS  - 1
VL  - 8
DO  - 10.3390/min8010011
UR  - conv_817
ER  - 

@article{
author = "Kragović, Milan and Pasalić, Snežana and Marković, Marija and Petrović, Marija and Nedeljković, Blagoje and Momcilović, Miloš and Stojmenović, Marija",
year = "2018",
abstract = "In present paper, the influence of the initial pH and concentration of Pb2+ on its adsorption by the natural (NZA) and Fe(III)-modified zeolite-alginate beads (FeA) was studied. Results showed that modification of the starting materials have a positive effect on their adsorption capacities (102 and 136 mg/g for the NZA and FeA, respectively). After encapsulation, the mechanism of lead adsorption by both adsorbents was changed and ion exchange dominates. The best adsorption was achieved for initial pH > 3.8. Cation exchange capacity, structural properties, and hydrophobicity of samples were also determined, and the presence of the alginate has no significant influence on investigated properties of samples. Experiments on wastewater from tailings of lead and zinc mine Grot, Serbia, showed that after treatment with both adsorbents, the content of the most abundant heavy metals (Pb, Zn, Hg, and Mn) significantly decreased.",
publisher = "MDPI, Basel",
journal = "Minerals",
title = "Natural and Modified Zeolite-Alginate Composites. Application for Removal of Heavy Metal Cations from Contaminated Water Solutions",
number = "1",
volume = "8",
doi = "10.3390/min8010011",
url = "conv_817"
}

Kragović, M., Pasalić, S., Marković, M., Petrović, M., Nedeljković, B., Momcilović, M.,& Stojmenović, M.. (2018). Natural and Modified Zeolite-Alginate Composites. Application for Removal of Heavy Metal Cations from Contaminated Water Solutions. in Minerals
MDPI, Basel., 8(1).
https://doi.org/10.3390/min8010011
conv_817

Kragović M, Pasalić S, Marković M, Petrović M, Nedeljković B, Momcilović M, Stojmenović M. Natural and Modified Zeolite-Alginate Composites. Application for Removal of Heavy Metal Cations from Contaminated Water Solutions. in Minerals. 2018;8(1).
doi:10.3390/min8010011
conv_817 .

Kragović, Milan, Pasalić, Snežana, Marković, Marija, Petrović, Marija, Nedeljković, Blagoje, Momcilović, Miloš, Stojmenović, Marija, "Natural and Modified Zeolite-Alginate Composites. Application for Removal of Heavy Metal Cations from Contaminated Water Solutions" in Minerals, 8, no. 1 (2018),
https://doi.org/10.3390/min8010011 .,
conv_817 .

TY  - JOUR
AU  - Terzić, Anja
AU  - Pezo, Lato
AU  - Mijatović, Nevenka
AU  - Stojanović, Jovica
AU  - Kragović, Milan
AU  - Milicić, Ljiljana
AU  - Andrić, Ljubiša
PY  - 2018
UR  - https://ritnms.itnms.ac.rs/handle/123456789/469
AB  - Instrumental analyses accompanied by analytical modeling tools were employed to assess physico-chemical changes induced by variations in chemical composition of cementitious composites, i.e. mortar binders. Coal combustion ash was utilized as pozzolanic mineral additive. The binders' mix-design was supplemented with sorptive clays to prevent migration of toxic elements from fly ash. The experiment was established on the premise of clay's ion-exchanging ability. Ten binders comprising cement CEM I 42.5 and fly ash, zeolite and/or bentonite additions were prepared in accordance with chemometric experimental design rules. Chemical composition was determined via XRF method. The changes in mineral phases and crystallinity were traced by X-ray diffraction. Hydration mechanisms and thermal behavior were investigated via DTA/TGA. The chemical bonds were identified by FTIR. Morphology of hardened samples was detected by SEM. Mathematical tools employed data sets of instrumental analyses to form a clear differentiation between binders and to assess changes caused by adoption of mineral additives in the mix designs. Sorptive clays showed pozzolanic behavior, thereby causing no incapacitation to the cement hydration mechanism, and classifying as a possible economical resources which can be used in production technology of construction materials to redeem environmental pollution issues of building industry.
PB  - Elsevier Sci Ltd, Oxford
T2  - Construction and Building Materials
T1  - The effect of alternations in mineral additives (zeolite, bentonite, fly ash) on physico-chemical behavior of Portland cement based binders
EP  - 210
SP  - 199
VL  - 180
DO  - 10.1016/j.conbuildmat.2018.06.007
UR  - conv_829
ER  - 

@article{
author = "Terzić, Anja and Pezo, Lato and Mijatović, Nevenka and Stojanović, Jovica and Kragović, Milan and Milicić, Ljiljana and Andrić, Ljubiša",
year = "2018",
abstract = "Instrumental analyses accompanied by analytical modeling tools were employed to assess physico-chemical changes induced by variations in chemical composition of cementitious composites, i.e. mortar binders. Coal combustion ash was utilized as pozzolanic mineral additive. The binders' mix-design was supplemented with sorptive clays to prevent migration of toxic elements from fly ash. The experiment was established on the premise of clay's ion-exchanging ability. Ten binders comprising cement CEM I 42.5 and fly ash, zeolite and/or bentonite additions were prepared in accordance with chemometric experimental design rules. Chemical composition was determined via XRF method. The changes in mineral phases and crystallinity were traced by X-ray diffraction. Hydration mechanisms and thermal behavior were investigated via DTA/TGA. The chemical bonds were identified by FTIR. Morphology of hardened samples was detected by SEM. Mathematical tools employed data sets of instrumental analyses to form a clear differentiation between binders and to assess changes caused by adoption of mineral additives in the mix designs. Sorptive clays showed pozzolanic behavior, thereby causing no incapacitation to the cement hydration mechanism, and classifying as a possible economical resources which can be used in production technology of construction materials to redeem environmental pollution issues of building industry.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Construction and Building Materials",
title = "The effect of alternations in mineral additives (zeolite, bentonite, fly ash) on physico-chemical behavior of Portland cement based binders",
pages = "210-199",
volume = "180",
doi = "10.1016/j.conbuildmat.2018.06.007",
url = "conv_829"
}

Terzić, A., Pezo, L., Mijatović, N., Stojanović, J., Kragović, M., Milicić, L.,& Andrić, L.. (2018). The effect of alternations in mineral additives (zeolite, bentonite, fly ash) on physico-chemical behavior of Portland cement based binders. in Construction and Building Materials
Elsevier Sci Ltd, Oxford., 180, 199-210.
https://doi.org/10.1016/j.conbuildmat.2018.06.007
conv_829

Terzić A, Pezo L, Mijatović N, Stojanović J, Kragović M, Milicić L, Andrić L. The effect of alternations in mineral additives (zeolite, bentonite, fly ash) on physico-chemical behavior of Portland cement based binders. in Construction and Building Materials. 2018;180:199-210.
doi:10.1016/j.conbuildmat.2018.06.007
conv_829 .

Terzić, Anja, Pezo, Lato, Mijatović, Nevenka, Stojanović, Jovica, Kragović, Milan, Milicić, Ljiljana, Andrić, Ljubiša, "The effect of alternations in mineral additives (zeolite, bentonite, fly ash) on physico-chemical behavior of Portland cement based binders" in Construction and Building Materials, 180 (2018):199-210,
https://doi.org/10.1016/j.conbuildmat.2018.06.007 .,
conv_829 .

TY  - JOUR
AU  - Jovanović, Vladimir
AU  - Knezević, Dinko N.
AU  - Sekulić, Živko
AU  - Kragović, Milan
AU  - Stojanović, Jovica
AU  - Mihajlović, Slavica
AU  - Nisić, Dragana
AU  - Radulović, Dragan
AU  - Ivošević, Branislav
AU  - Petrov, Milan
PY  - 2017
UR  - https://ritnms.itnms.ac.rs/handle/123456789/453
AB  - This paper presents the results of tests carried out to determine how the dosage of bentonite added as binder, affects the properties of green pellets made of the limestone fines that originate from Lithothamnium limestone processing. Bentonite was added to limestone in different mass fractions (1, 2.5, 5 and 10%), whereas all the other parameters of the pelletizing process remained constant. The aim of pelletizing was to consolidate limestone fines and form mechanically stable pellets, provided that all the other properties of limestone remain unchanged. The pellets formed in this way were analysed applying DTA/TG analysis and FTIR and SEM analyses. The results showed uniform distribution of bentonite in the pellets, demonstrated that the pellets are compact and there is no formation of new compounds. The pellets were tested for resistance to impact, compressive strength and abrasion resistance. Also disintegration tests were performed to determine the time required for the pellet to disintegrate completely in water. These mechanical properties are essential for transport, handling, storage and general use of pellets. The values of most of the parameters established for pellets with 5% bentonite, meet the standards required for use in agriculture for liming acid soils, however their application is limited because their impact resistance is unsatisfactory and the time required for their complete disintegration in water is extremely short. It should be noted that further increase of bentonite content (over 10%) will not improve the quality of green pellets. In view of the results obtained, it is necessary to introduce drying into the pelletizing process in order to bring the green pellets into solid state.
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska industrija
T1  - Effects of bentonite binder dosage on the properties of green limestone pellets
EP  - 144
IS  - 2
SP  - 135
VL  - 71
DO  - 10.2298/HEMIND160210023J
UR  - conv_793
ER  - 

@article{
author = "Jovanović, Vladimir and Knezević, Dinko N. and Sekulić, Živko and Kragović, Milan and Stojanović, Jovica and Mihajlović, Slavica and Nisić, Dragana and Radulović, Dragan and Ivošević, Branislav and Petrov, Milan",
year = "2017",
abstract = "This paper presents the results of tests carried out to determine how the dosage of bentonite added as binder, affects the properties of green pellets made of the limestone fines that originate from Lithothamnium limestone processing. Bentonite was added to limestone in different mass fractions (1, 2.5, 5 and 10%), whereas all the other parameters of the pelletizing process remained constant. The aim of pelletizing was to consolidate limestone fines and form mechanically stable pellets, provided that all the other properties of limestone remain unchanged. The pellets formed in this way were analysed applying DTA/TG analysis and FTIR and SEM analyses. The results showed uniform distribution of bentonite in the pellets, demonstrated that the pellets are compact and there is no formation of new compounds. The pellets were tested for resistance to impact, compressive strength and abrasion resistance. Also disintegration tests were performed to determine the time required for the pellet to disintegrate completely in water. These mechanical properties are essential for transport, handling, storage and general use of pellets. The values of most of the parameters established for pellets with 5% bentonite, meet the standards required for use in agriculture for liming acid soils, however their application is limited because their impact resistance is unsatisfactory and the time required for their complete disintegration in water is extremely short. It should be noted that further increase of bentonite content (over 10%) will not improve the quality of green pellets. In view of the results obtained, it is necessary to introduce drying into the pelletizing process in order to bring the green pellets into solid state.",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska industrija",
title = "Effects of bentonite binder dosage on the properties of green limestone pellets",
pages = "144-135",
number = "2",
volume = "71",
doi = "10.2298/HEMIND160210023J",
url = "conv_793"
}

Jovanović, V., Knezević, D. N., Sekulić, Ž., Kragović, M., Stojanović, J., Mihajlović, S., Nisić, D., Radulović, D., Ivošević, B.,& Petrov, M.. (2017). Effects of bentonite binder dosage on the properties of green limestone pellets. in Hemijska industrija
Savez hemijskih inženjera, Beograd., 71(2), 135-144.
https://doi.org/10.2298/HEMIND160210023J
conv_793

Jovanović V, Knezević DN, Sekulić Ž, Kragović M, Stojanović J, Mihajlović S, Nisić D, Radulović D, Ivošević B, Petrov M. Effects of bentonite binder dosage on the properties of green limestone pellets. in Hemijska industrija. 2017;71(2):135-144.
doi:10.2298/HEMIND160210023J
conv_793 .

Jovanović, Vladimir, Knezević, Dinko N., Sekulić, Živko, Kragović, Milan, Stojanović, Jovica, Mihajlović, Slavica, Nisić, Dragana, Radulović, Dragan, Ivošević, Branislav, Petrov, Milan, "Effects of bentonite binder dosage on the properties of green limestone pellets" in Hemijska industrija, 71, no. 2 (2017):135-144,
https://doi.org/10.2298/HEMIND160210023J .,
conv_793 .

TY  - JOUR
AU  - Marković, Marija
AU  - Daković, Aleksandra
AU  - Rottinghaus, George E.
AU  - Petković, Anđela
AU  - Kragović, Milan
AU  - Krajišnik, Danina
AU  - Milić, Jela
PY  - 2017
UR  - https://ritnms.itnms.ac.rs/handle/123456789/438
AB  - Benzalkonium chloride - BC (the mixture of alkylbenzyldimethylammonium chlorides containing the alkyl groups having chain lengths of C8 to C18 and benzyl functional group) was used as a surfactant for production of organozeolites (BZs). The natural zeolite - clinoptilolite was modified with three different levels (2, 5 and 10 mmol/100 g) of BC. FTIR spectroscopy, thermal analysis, zeta potential measurements, determination of the point of zero charge and BET were used to determine the quantity of the surfactant at the zeolitic surface. The main aim was to investigate adsorption properties of BZs towards ochratoxin A (OCHRA) and zearalenone (ZEN) under in vitro conditions. Results showed that adsorption of OCHRA and ZEN by BZs increased with increasing amounts of BC at the zeolitic surface but the adsorption mechanism was different. Adsorption of OCHRA by BZs followed nonlinear isotherms at pH 3 and 7, and higher adsorption capacity was observed at pH 3. This indicates that adsorption was dependent on the form of OCHRA in solution and that the sites at the uncovered zeolitic surface together with the surfactants contributed to OCHRA adsorption. Adsorption of ZEN by BZs showed linear isotherms at pH 3 and 7 and similar amounts were adsorbed at both pH values. This suggests that adsorption is practically independent of the form of ZEN in solution and that organic cations at the zeolitic surface are the active sites relevant for ZEN adsorption.
PB  - Elsevier, Amsterdam
T2  - Colloids and Surfaces A-Physicochemical and Engineering Aspects
T1  - Ochratoxin A and zearalenone adsorption by the natural zeolite treated with benzalkonium chloride
EP  - 17
SP  - 7
VL  - 529
DO  - 10.1016/j.colsurfa.2017.05.054
UR  - conv_802
ER  - 

@article{
author = "Marković, Marija and Daković, Aleksandra and Rottinghaus, George E. and Petković, Anđela and Kragović, Milan and Krajišnik, Danina and Milić, Jela",
year = "2017",
abstract = "Benzalkonium chloride - BC (the mixture of alkylbenzyldimethylammonium chlorides containing the alkyl groups having chain lengths of C8 to C18 and benzyl functional group) was used as a surfactant for production of organozeolites (BZs). The natural zeolite - clinoptilolite was modified with three different levels (2, 5 and 10 mmol/100 g) of BC. FTIR spectroscopy, thermal analysis, zeta potential measurements, determination of the point of zero charge and BET were used to determine the quantity of the surfactant at the zeolitic surface. The main aim was to investigate adsorption properties of BZs towards ochratoxin A (OCHRA) and zearalenone (ZEN) under in vitro conditions. Results showed that adsorption of OCHRA and ZEN by BZs increased with increasing amounts of BC at the zeolitic surface but the adsorption mechanism was different. Adsorption of OCHRA by BZs followed nonlinear isotherms at pH 3 and 7, and higher adsorption capacity was observed at pH 3. This indicates that adsorption was dependent on the form of OCHRA in solution and that the sites at the uncovered zeolitic surface together with the surfactants contributed to OCHRA adsorption. Adsorption of ZEN by BZs showed linear isotherms at pH 3 and 7 and similar amounts were adsorbed at both pH values. This suggests that adsorption is practically independent of the form of ZEN in solution and that organic cations at the zeolitic surface are the active sites relevant for ZEN adsorption.",
publisher = "Elsevier, Amsterdam",
journal = "Colloids and Surfaces A-Physicochemical and Engineering Aspects",
title = "Ochratoxin A and zearalenone adsorption by the natural zeolite treated with benzalkonium chloride",
pages = "17-7",
volume = "529",
doi = "10.1016/j.colsurfa.2017.05.054",
url = "conv_802"
}

Marković, M., Daković, A., Rottinghaus, G. E., Petković, A., Kragović, M., Krajišnik, D.,& Milić, J.. (2017). Ochratoxin A and zearalenone adsorption by the natural zeolite treated with benzalkonium chloride. in Colloids and Surfaces A-Physicochemical and Engineering Aspects
Elsevier, Amsterdam., 529, 7-17.
https://doi.org/10.1016/j.colsurfa.2017.05.054
conv_802

Marković M, Daković A, Rottinghaus GE, Petković A, Kragović M, Krajišnik D, Milić J. Ochratoxin A and zearalenone adsorption by the natural zeolite treated with benzalkonium chloride. in Colloids and Surfaces A-Physicochemical and Engineering Aspects. 2017;529:7-17.
doi:10.1016/j.colsurfa.2017.05.054
conv_802 .

Marković, Marija, Daković, Aleksandra, Rottinghaus, George E., Petković, Anđela, Kragović, Milan, Krajišnik, Danina, Milić, Jela, "Ochratoxin A and zearalenone adsorption by the natural zeolite treated with benzalkonium chloride" in Colloids and Surfaces A-Physicochemical and Engineering Aspects, 529 (2017):7-17,
https://doi.org/10.1016/j.colsurfa.2017.05.054 .,
conv_802 .

TY  - JOUR
AU  - Mitovski, Aleksandra
AU  - Štrbac, Nada
AU  - Sokić, Miroslav
AU  - Kragović, Milan
AU  - Grekulović, Vesna
PY  - 2017
UR  - https://ritnms.itnms.ac.rs/handle/123456789/436
AB  - Sulfide copper concentrate from domestic ore deposit (Bor, Serbia) was subjected to oxidation in the air atmosphere due to a better understanding of reaction mechanism and oxidation of various sulfides present in the copper concentrate at elevated temperatures. Results of the initial sample characterization showed that concentrate is chalcopyrite-enargite-tennantite type, with an increased arsenic content. Characterization of the oxidation products showed the presence of sulfates, oxysulfates, and oxides. Based on predominance area diagrams for Me-S-O systems (Me = Cu, Fe, As) combined with thermal analysis results, the reaction mechanism of the oxidation process was proposed. The reactions which occur in the temperature range 25 -1000 degrees C indicate that sulfides are unstable in the oxidative conditions. Sulfides from the initial sample decomposed into binary copper and iron sulfides and volatile arsenic oxides at lower temperatures. Further heating led to oxidation of sulfides into iron oxides and copper sulfates and oxysulfates. At higher temperatures sulfates and oxysulfates decomposed into oxides. Kinetic analysis of the oxidation process was done using Ozawa's method in the non-isothermal conditions. The values for activation energies showed that the reactions are chemically controlled and the temperature is the most influential parameter on the reaction rates.
PB  - Savez inženjera metalurgije Srbije, Beograd
T2  - Metallurgical & Materials Engineering
T1  - Reaction mechanism and kinetics of sulfide copper concentrate oxidation at elevated temperatures
EP  - 280
IS  - 3
SP  - 267
VL  - 23
DO  - 10.30544/320
UR  - conv_812
ER  - 

@article{
author = "Mitovski, Aleksandra and Štrbac, Nada and Sokić, Miroslav and Kragović, Milan and Grekulović, Vesna",
year = "2017",
abstract = "Sulfide copper concentrate from domestic ore deposit (Bor, Serbia) was subjected to oxidation in the air atmosphere due to a better understanding of reaction mechanism and oxidation of various sulfides present in the copper concentrate at elevated temperatures. Results of the initial sample characterization showed that concentrate is chalcopyrite-enargite-tennantite type, with an increased arsenic content. Characterization of the oxidation products showed the presence of sulfates, oxysulfates, and oxides. Based on predominance area diagrams for Me-S-O systems (Me = Cu, Fe, As) combined with thermal analysis results, the reaction mechanism of the oxidation process was proposed. The reactions which occur in the temperature range 25 -1000 degrees C indicate that sulfides are unstable in the oxidative conditions. Sulfides from the initial sample decomposed into binary copper and iron sulfides and volatile arsenic oxides at lower temperatures. Further heating led to oxidation of sulfides into iron oxides and copper sulfates and oxysulfates. At higher temperatures sulfates and oxysulfates decomposed into oxides. Kinetic analysis of the oxidation process was done using Ozawa's method in the non-isothermal conditions. The values for activation energies showed that the reactions are chemically controlled and the temperature is the most influential parameter on the reaction rates.",
publisher = "Savez inženjera metalurgije Srbije, Beograd",
journal = "Metallurgical & Materials Engineering",
title = "Reaction mechanism and kinetics of sulfide copper concentrate oxidation at elevated temperatures",
pages = "280-267",
number = "3",
volume = "23",
doi = "10.30544/320",
url = "conv_812"
}

Mitovski, A., Štrbac, N., Sokić, M., Kragović, M.,& Grekulović, V.. (2017). Reaction mechanism and kinetics of sulfide copper concentrate oxidation at elevated temperatures. in Metallurgical & Materials Engineering
Savez inženjera metalurgije Srbije, Beograd., 23(3), 267-280.
https://doi.org/10.30544/320
conv_812

Mitovski A, Štrbac N, Sokić M, Kragović M, Grekulović V. Reaction mechanism and kinetics of sulfide copper concentrate oxidation at elevated temperatures. in Metallurgical & Materials Engineering. 2017;23(3):267-280.
doi:10.30544/320
conv_812 .

Mitovski, Aleksandra, Štrbac, Nada, Sokić, Miroslav, Kragović, Milan, Grekulović, Vesna, "Reaction mechanism and kinetics of sulfide copper concentrate oxidation at elevated temperatures" in Metallurgical & Materials Engineering, 23, no. 3 (2017):267-280,
https://doi.org/10.30544/320 .,
conv_812 .

TY  - JOUR
AU  - Marković, Marija
AU  - Daković, Aleksandra
AU  - Rottinghaus, George E.
AU  - Kragović, Milan
AU  - Petković, Anđela
AU  - Krajišnik, Danina
AU  - Milić, Jela
AU  - Mercurio, Mariano
AU  - de Gennaro, Bruno
PY  - 2017
UR  - https://ritnms.itnms.ac.rs/handle/123456789/430
AB  - In this study, organozeolites were prepared by treatment of the natural zeolites (clinoptilolite and phillipsite) with cetylpyridinium chloride (CP) equivalent to 50 and 100% of their external cation exchange capacities (ECEC). Organoclinoptilolites (ZCPs) and organophillipsites (PCPs) were characterized by FTIR spectroscopy, thermal analysis, determination of the point of zero charge and zeta potential. Adsorption of zearalenone (ZEN) by ZCPs and PCPs at pH 3 and 7 was investigated. Results showed that adsorption of ZEN increases with increasing amounts of CP at the zeolitic surfaces for both ZCPs and PCPs but the adsorption mechanism was different. Adsorption of ZEN by ZCPs followed a linear type of isotherm at pH 3 and 7 while ZEN adsorption by PCPs showed non linear (Langmuir and Freundlich) type of isotherm at both pH values. Different interactions between the ZEN molecule (or ion) and ZCPs and PCPs occurred: partition (linear isotherms) and adsorption in addition to partition (non linear isotherms), respectively. For the highest level of organic phase at the zeolitic surfaces, the maximum adsorbed amount of ZEN was 5.73 mg/g for organoclinoptilolite and 6.86 mg/g for organophillipsite at pH 3. Slightly higher adsorption: 6.98 mg/g for organoclinoptilolite and 7.54 mg/g for organophillipsite was achieved at pH 7. The results confirmed that CP ions at both zeolitic surfaces are responsible for ZEN adsorption and that organophillipsites are as effective in ZEN adsorption as organoclinoptilolites.
PB  - Elsevier, Amsterdam
T2  - Colloids and Surfaces B-Biointerfaces
T1  - Adsorption of the mycotoxin zearalenone by clinoptilolite and phillipsite zeolites treated with cetylpyridinium surfactant
EP  - 332
SP  - 324
VL  - 151
DO  - 10.1016/j.colsurfb.2016.12.033
UR  - conv_788
ER  - 

@article{
author = "Marković, Marija and Daković, Aleksandra and Rottinghaus, George E. and Kragović, Milan and Petković, Anđela and Krajišnik, Danina and Milić, Jela and Mercurio, Mariano and de Gennaro, Bruno",
year = "2017",
abstract = "In this study, organozeolites were prepared by treatment of the natural zeolites (clinoptilolite and phillipsite) with cetylpyridinium chloride (CP) equivalent to 50 and 100% of their external cation exchange capacities (ECEC). Organoclinoptilolites (ZCPs) and organophillipsites (PCPs) were characterized by FTIR spectroscopy, thermal analysis, determination of the point of zero charge and zeta potential. Adsorption of zearalenone (ZEN) by ZCPs and PCPs at pH 3 and 7 was investigated. Results showed that adsorption of ZEN increases with increasing amounts of CP at the zeolitic surfaces for both ZCPs and PCPs but the adsorption mechanism was different. Adsorption of ZEN by ZCPs followed a linear type of isotherm at pH 3 and 7 while ZEN adsorption by PCPs showed non linear (Langmuir and Freundlich) type of isotherm at both pH values. Different interactions between the ZEN molecule (or ion) and ZCPs and PCPs occurred: partition (linear isotherms) and adsorption in addition to partition (non linear isotherms), respectively. For the highest level of organic phase at the zeolitic surfaces, the maximum adsorbed amount of ZEN was 5.73 mg/g for organoclinoptilolite and 6.86 mg/g for organophillipsite at pH 3. Slightly higher adsorption: 6.98 mg/g for organoclinoptilolite and 7.54 mg/g for organophillipsite was achieved at pH 7. The results confirmed that CP ions at both zeolitic surfaces are responsible for ZEN adsorption and that organophillipsites are as effective in ZEN adsorption as organoclinoptilolites.",
publisher = "Elsevier, Amsterdam",
journal = "Colloids and Surfaces B-Biointerfaces",
title = "Adsorption of the mycotoxin zearalenone by clinoptilolite and phillipsite zeolites treated with cetylpyridinium surfactant",
pages = "332-324",
volume = "151",
doi = "10.1016/j.colsurfb.2016.12.033",
url = "conv_788"
}

Marković, M., Daković, A., Rottinghaus, G. E., Kragović, M., Petković, A., Krajišnik, D., Milić, J., Mercurio, M.,& de Gennaro, B.. (2017). Adsorption of the mycotoxin zearalenone by clinoptilolite and phillipsite zeolites treated with cetylpyridinium surfactant. in Colloids and Surfaces B-Biointerfaces
Elsevier, Amsterdam., 151, 324-332.
https://doi.org/10.1016/j.colsurfb.2016.12.033
conv_788

Marković M, Daković A, Rottinghaus GE, Kragović M, Petković A, Krajišnik D, Milić J, Mercurio M, de Gennaro B. Adsorption of the mycotoxin zearalenone by clinoptilolite and phillipsite zeolites treated with cetylpyridinium surfactant. in Colloids and Surfaces B-Biointerfaces. 2017;151:324-332.
doi:10.1016/j.colsurfb.2016.12.033
conv_788 .

Marković, Marija, Daković, Aleksandra, Rottinghaus, George E., Kragović, Milan, Petković, Anđela, Krajišnik, Danina, Milić, Jela, Mercurio, Mariano, de Gennaro, Bruno, "Adsorption of the mycotoxin zearalenone by clinoptilolite and phillipsite zeolites treated with cetylpyridinium surfactant" in Colloids and Surfaces B-Biointerfaces, 151 (2017):324-332,
https://doi.org/10.1016/j.colsurfb.2016.12.033 .,
conv_788 .

TY  - CONF
AU  - Kragović, Milan
AU  - Daković, Aleksandra
AU  - Marković, Marija
AU  - Petković, Anđela
AU  - Milojković, Jelena
AU  - Zildžović, Snežana
PY  - 2017
UR  - https://ritnms.itnms.ac.rs/handle/123456789/422
AB  - In this paper, immobilization of the natural (NZ) and Fe(III)-modified zeolite (FeZ) by Na-alginate was performed in order to improve their properties. Obtained results showed that alginate could be used for encapsulation of the natural and Fe(III)-modified zeolite in order to solve problem with water turbidity. Heavy metal cations (lead and cadmium) removal from water solutions by the natural and Fe(III)-modified zeolite with particle size:  LT 0.043 mm (NZ and FeZ) and -0.8 + 0.6 mm (NZ1 and FeZ1) and NZ or FeZ after encapsulation with alginate (NZA and FeA) was preliminarily tested. Obtained results showed that adsorbed amounts of lead as well as cadmium increased after modification of the natural zeolite with Fe(III) ions but decreased with increasing of the particle size. Adsorbed amounts for lead were: 63, 57, 133 and 101 mg/g, while for cadmium: 11, 6, 19 and 14 for NZ, NZ1, FeZ and FeZ1, respectively. After immobilization of the NZ and FeZ with alginate, adsorbed amounts of lead were 101 and 134 mg/g and for cadmium 20 and 28 mg/g for NZA and FeA, respectively indicating that modification had no negative influence on adsorption. Besides positive effect on adsorption of heavy metal cations, easy modification with alginate could solve problems with water turbidity and separation, thus these materials may be suitable for column experiments. These results suggest that encapsulated samples could find practical application in purification of water contaminated with lead and cadmium.
PB  - Amer Scientific Publishers, Valencia
C3  - Advanced Science Letters
T1  - Removal of Lead and Cadmium Ions from Aqueous Solutions by Using Natural and Modified Zeolite
EP  - 5865
IS  - 6
SP  - 5862
VL  - 23
DO  - 10.1166/asl.2017.9051
UR  - conv_821
ER  - 

@conference{
author = "Kragović, Milan and Daković, Aleksandra and Marković, Marija and Petković, Anđela and Milojković, Jelena and Zildžović, Snežana",
year = "2017",
abstract = "In this paper, immobilization of the natural (NZ) and Fe(III)-modified zeolite (FeZ) by Na-alginate was performed in order to improve their properties. Obtained results showed that alginate could be used for encapsulation of the natural and Fe(III)-modified zeolite in order to solve problem with water turbidity. Heavy metal cations (lead and cadmium) removal from water solutions by the natural and Fe(III)-modified zeolite with particle size:  LT 0.043 mm (NZ and FeZ) and -0.8 + 0.6 mm (NZ1 and FeZ1) and NZ or FeZ after encapsulation with alginate (NZA and FeA) was preliminarily tested. Obtained results showed that adsorbed amounts of lead as well as cadmium increased after modification of the natural zeolite with Fe(III) ions but decreased with increasing of the particle size. Adsorbed amounts for lead were: 63, 57, 133 and 101 mg/g, while for cadmium: 11, 6, 19 and 14 for NZ, NZ1, FeZ and FeZ1, respectively. After immobilization of the NZ and FeZ with alginate, adsorbed amounts of lead were 101 and 134 mg/g and for cadmium 20 and 28 mg/g for NZA and FeA, respectively indicating that modification had no negative influence on adsorption. Besides positive effect on adsorption of heavy metal cations, easy modification with alginate could solve problems with water turbidity and separation, thus these materials may be suitable for column experiments. These results suggest that encapsulated samples could find practical application in purification of water contaminated with lead and cadmium.",
publisher = "Amer Scientific Publishers, Valencia",
journal = "Advanced Science Letters",
title = "Removal of Lead and Cadmium Ions from Aqueous Solutions by Using Natural and Modified Zeolite",
pages = "5865-5862",
number = "6",
volume = "23",
doi = "10.1166/asl.2017.9051",
url = "conv_821"
}

Kragović, M., Daković, A., Marković, M., Petković, A., Milojković, J.,& Zildžović, S.. (2017). Removal of Lead and Cadmium Ions from Aqueous Solutions by Using Natural and Modified Zeolite. in Advanced Science Letters
Amer Scientific Publishers, Valencia., 23(6), 5862-5865.
https://doi.org/10.1166/asl.2017.9051
conv_821

Kragović M, Daković A, Marković M, Petković A, Milojković J, Zildžović S. Removal of Lead and Cadmium Ions from Aqueous Solutions by Using Natural and Modified Zeolite. in Advanced Science Letters. 2017;23(6):5862-5865.
doi:10.1166/asl.2017.9051
conv_821 .

Kragović, Milan, Daković, Aleksandra, Marković, Marija, Petković, Anđela, Milojković, Jelena, Zildžović, Snežana, "Removal of Lead and Cadmium Ions from Aqueous Solutions by Using Natural and Modified Zeolite" in Advanced Science Letters, 23, no. 6 (2017):5862-5865,
https://doi.org/10.1166/asl.2017.9051 .,
conv_821 .

TY  - JOUR
AU  - de Gennaro, Bruno
AU  - Mercurio, Mariano
AU  - Cappelletti, Piergiulio
AU  - Catalanotti, Lilia
AU  - Daković, Aleksandra
AU  - De Bonis, Alberto
AU  - Grifa, Celestino
AU  - Izzo, Francesco
AU  - Kragović, Milan
AU  - Monetti, Vincenzo
AU  - Langella, Alessio
PY  - 2016
UR  - https://ritnms.itnms.ac.rs/handle/123456789/388
AB  - Main purpose of the research was to define an operative protocol, applicable at industrial scale, optimizing the functionalization of natural zeolites with surfactants, especially in pharmaceutical and environmental sphere. Three zeolite-rich samples from Italy (PHI_SAV), Slovakia (CLI_SK) and California (CLI_CA) were used for preparation of SMNZ. Two different protocols allowed to carry out surfactant adsorption equilibrium runs and surfactant sorption kinetics by varying different parameters: mixing speed (4000, 6000, and 8000 rpm); contact time (15 divided by 90 min) and initial surfactant concentration (from 25% to 200% of the external cation exchange capacity - ECEC) at a constant solid/liquid ratio (1 g/50 mL). Zeolite-rich materials were treated with solutions of cetylpiridinium chloride (CP-Cl). The functionalization of SMNZ was obtained by using a high-speed disperser. The amount of absorbed surfactant onto two carriers (CLI_SK and PHI_SAV) was evaluated through kinetic experiments under the following conditions: the initial CP-Cl concentration of 150% of the ECEC and a disperser speed of 8000 rpm. Results showed that after 15 min, equilibrium was attained with the adsorbed amount of about 0.14 meq/g of CP-Cl (equivalent to the ECEC of the investigated zeolitic support), confirming formation of monolayer (emi-micelle). The functionalization (micelle formation) of two samples occurred after 70 min of solid/liquid interaction with a total yield equal to 150% of the ECEC, thus indicating formation of a patchy bilayer. By contrast, CLI_CA behaves completely differently since the formation of emi-micelle was achieved only at much higher speed (18000 rpm) and not earlier than 90 min of mixing.
PB  - Elsevier, Amsterdam
T2  - Microporous and Mesoporous Materials
T1  - Use of surface modified natural zeolite (SMNZ) in pharmaceutical preparations. Part 2. A new approach for a fast functionalization of zeolite-rich carriers
EP  - 49
SP  - 42
VL  - 235
DO  - 10.1016/j.micromeso.2016.07.043
UR  - conv_770
ER  - 

@article{
author = "de Gennaro, Bruno and Mercurio, Mariano and Cappelletti, Piergiulio and Catalanotti, Lilia and Daković, Aleksandra and De Bonis, Alberto and Grifa, Celestino and Izzo, Francesco and Kragović, Milan and Monetti, Vincenzo and Langella, Alessio",
year = "2016",
abstract = "Main purpose of the research was to define an operative protocol, applicable at industrial scale, optimizing the functionalization of natural zeolites with surfactants, especially in pharmaceutical and environmental sphere. Three zeolite-rich samples from Italy (PHI_SAV), Slovakia (CLI_SK) and California (CLI_CA) were used for preparation of SMNZ. Two different protocols allowed to carry out surfactant adsorption equilibrium runs and surfactant sorption kinetics by varying different parameters: mixing speed (4000, 6000, and 8000 rpm); contact time (15 divided by 90 min) and initial surfactant concentration (from 25% to 200% of the external cation exchange capacity - ECEC) at a constant solid/liquid ratio (1 g/50 mL). Zeolite-rich materials were treated with solutions of cetylpiridinium chloride (CP-Cl). The functionalization of SMNZ was obtained by using a high-speed disperser. The amount of absorbed surfactant onto two carriers (CLI_SK and PHI_SAV) was evaluated through kinetic experiments under the following conditions: the initial CP-Cl concentration of 150% of the ECEC and a disperser speed of 8000 rpm. Results showed that after 15 min, equilibrium was attained with the adsorbed amount of about 0.14 meq/g of CP-Cl (equivalent to the ECEC of the investigated zeolitic support), confirming formation of monolayer (emi-micelle). The functionalization (micelle formation) of two samples occurred after 70 min of solid/liquid interaction with a total yield equal to 150% of the ECEC, thus indicating formation of a patchy bilayer. By contrast, CLI_CA behaves completely differently since the formation of emi-micelle was achieved only at much higher speed (18000 rpm) and not earlier than 90 min of mixing.",
publisher = "Elsevier, Amsterdam",
journal = "Microporous and Mesoporous Materials",
title = "Use of surface modified natural zeolite (SMNZ) in pharmaceutical preparations. Part 2. A new approach for a fast functionalization of zeolite-rich carriers",
pages = "49-42",
volume = "235",
doi = "10.1016/j.micromeso.2016.07.043",
url = "conv_770"
}

de Gennaro, B., Mercurio, M., Cappelletti, P., Catalanotti, L., Daković, A., De Bonis, A., Grifa, C., Izzo, F., Kragović, M., Monetti, V.,& Langella, A.. (2016). Use of surface modified natural zeolite (SMNZ) in pharmaceutical preparations. Part 2. A new approach for a fast functionalization of zeolite-rich carriers. in Microporous and Mesoporous Materials
Elsevier, Amsterdam., 235, 42-49.
https://doi.org/10.1016/j.micromeso.2016.07.043
conv_770

de Gennaro B, Mercurio M, Cappelletti P, Catalanotti L, Daković A, De Bonis A, Grifa C, Izzo F, Kragović M, Monetti V, Langella A. Use of surface modified natural zeolite (SMNZ) in pharmaceutical preparations. Part 2. A new approach for a fast functionalization of zeolite-rich carriers. in Microporous and Mesoporous Materials. 2016;235:42-49.
doi:10.1016/j.micromeso.2016.07.043
conv_770 .

de Gennaro, Bruno, Mercurio, Mariano, Cappelletti, Piergiulio, Catalanotti, Lilia, Daković, Aleksandra, De Bonis, Alberto, Grifa, Celestino, Izzo, Francesco, Kragović, Milan, Monetti, Vincenzo, Langella, Alessio, "Use of surface modified natural zeolite (SMNZ) in pharmaceutical preparations. Part 2. A new approach for a fast functionalization of zeolite-rich carriers" in Microporous and Mesoporous Materials, 235 (2016):42-49,
https://doi.org/10.1016/j.micromeso.2016.07.043 .,
conv_770 .

TY  - JOUR
AU  - Petrović, Jelena
AU  - Perišić, Nebojša
AU  - Dragišić-Maksimović, Jelena
AU  - Maksimović, Vuk
AU  - Kragović, Milan
AU  - Stojanović, Mirjana
AU  - Lausević, Mila
AU  - Mihajlović, Marija
PY  - 2016
UR  - https://ritnms.itnms.ac.rs/handle/123456789/417
AB  - In this study, carbonization products of grape pomace (hydrochar and process water) have been thoroughly characterized in order to assess its fuel properties, physico-chemical composition and to optimize its production. The obtained detailed insight into transformations of the biomass during hydrothermal conversion between 180-220 degrees C revealed that the hydrochar obtained at 220 degrees C exhibits a considerable energetic potential, increased porosity and re-adsorption abbility. Hydrothermally induced structural changes in the obtained hydrochars were unveiled by thermal and morphology analysis, FTIR and NIR spectroscopy. Temperature increment caused a decrease in antioxidative capacity, anthocyanin and organic acid content in process water and simultaneous increase in total phenolic and individual organic components content. The overall effect of the reaction temperature on products characteristics was assessed by multivariate data analysis. Obtained results substantiated the suitability of hydrothermal conversion of grape pomace into highly valuable fuels and versatile products.
PB  - Elsevier Science Bv, Amsterdam
T2  - Journal of Analytical and Applied Pyrolysis
T1  - Hydrothermal conversion of grape pomace: Detailed characterization of obtained hydrochar and liquid phase
EP  - 277
SP  - 267
VL  - 118
DO  - 10.1016/j.jaap.2016.02.010
UR  - conv_755
ER  - 

@article{
author = "Petrović, Jelena and Perišić, Nebojša and Dragišić-Maksimović, Jelena and Maksimović, Vuk and Kragović, Milan and Stojanović, Mirjana and Lausević, Mila and Mihajlović, Marija",
year = "2016",
abstract = "In this study, carbonization products of grape pomace (hydrochar and process water) have been thoroughly characterized in order to assess its fuel properties, physico-chemical composition and to optimize its production. The obtained detailed insight into transformations of the biomass during hydrothermal conversion between 180-220 degrees C revealed that the hydrochar obtained at 220 degrees C exhibits a considerable energetic potential, increased porosity and re-adsorption abbility. Hydrothermally induced structural changes in the obtained hydrochars were unveiled by thermal and morphology analysis, FTIR and NIR spectroscopy. Temperature increment caused a decrease in antioxidative capacity, anthocyanin and organic acid content in process water and simultaneous increase in total phenolic and individual organic components content. The overall effect of the reaction temperature on products characteristics was assessed by multivariate data analysis. Obtained results substantiated the suitability of hydrothermal conversion of grape pomace into highly valuable fuels and versatile products.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Journal of Analytical and Applied Pyrolysis",
title = "Hydrothermal conversion of grape pomace: Detailed characterization of obtained hydrochar and liquid phase",
pages = "277-267",
volume = "118",
doi = "10.1016/j.jaap.2016.02.010",
url = "conv_755"
}

Petrović, J., Perišić, N., Dragišić-Maksimović, J., Maksimović, V., Kragović, M., Stojanović, M., Lausević, M.,& Mihajlović, M.. (2016). Hydrothermal conversion of grape pomace: Detailed characterization of obtained hydrochar and liquid phase. in Journal of Analytical and Applied Pyrolysis
Elsevier Science Bv, Amsterdam., 118, 267-277.
https://doi.org/10.1016/j.jaap.2016.02.010
conv_755

Petrović J, Perišić N, Dragišić-Maksimović J, Maksimović V, Kragović M, Stojanović M, Lausević M, Mihajlović M. Hydrothermal conversion of grape pomace: Detailed characterization of obtained hydrochar and liquid phase. in Journal of Analytical and Applied Pyrolysis. 2016;118:267-277.
doi:10.1016/j.jaap.2016.02.010
conv_755 .

Petrović, Jelena, Perišić, Nebojša, Dragišić-Maksimović, Jelena, Maksimović, Vuk, Kragović, Milan, Stojanović, Mirjana, Lausević, Mila, Mihajlović, Marija, "Hydrothermal conversion of grape pomace: Detailed characterization of obtained hydrochar and liquid phase" in Journal of Analytical and Applied Pyrolysis, 118 (2016):267-277,
https://doi.org/10.1016/j.jaap.2016.02.010 .,
conv_755 .

TY  - JOUR
AU  - Marković, Marija
AU  - Daković, Aleksandra
AU  - Rottinghaus, George E.
AU  - Stojanović, Mirjana
AU  - Dondur, Vera
AU  - Kragović, Milan
AU  - Gulišija, Zvonko
PY  - 2016
UR  - https://ritnms.itnms.ac.rs/handle/123456789/405
AB  - Aflatoxin B-1 adsorption by the concentrate of bentonite clay - montmorillonite and the natural zeolite -clinoptilolite and was investigated at the initial toxin concentration of 4 ppm, with different amounts of solid phase in suspension (1, 0.5, 0.2 and 0.1 g/L) and different pH values - 3, 7 and 9. Results indicated that for both minerals, decreasing the amount of solid phase in suspension, decrease the amount of active sites relevant for adsorption of aflatoxin B-1. Thus, for concentrate of montnorillonite, at the lowest level of solid phase in suspension (0.1 g/L), aflatoxin B-1 adsorption indexes were 97% at pH 3, 88% at pH 7 and 82% at pH 9, while for the natural zeolite, adsorption of toxin was 9% at pH 3 and 7% at pH 7 and 9. Since inorganic cations in minerals are mainly responsible for aflatoxin B-1 adsorption, even the natural zeolite - clinoptilite has much higher cation exchange capacity (the content of inorganic exchangeable cations) compared to the concentrate of montmorillonite, adsorption of aflatoxin B-1 by this mineral is much lower. Comparing the molecular dimensions of aflatoxin B-1 molecule with the dimension of channels of clinoptilolite and interlamellar space of montmorillonite it is obvious that this toxin is adsorbed only at the external surface of clinoptilolite while in the montmorillonite all active sites are equally available for its adsorption. Thus, the concentrate of montmorillonite possesses higher adsorption capacity for aflatoxin B-1. Results presented in this paper confirmed the fact that the differences in the structure of minerals led to their different efficiency for adsorption of aflatoxin B-1. Mineralogical and chemical composition, determination of cation exchange capacity, etc., are very important parameters influencing the effectiveness of minerals as aflatoxin B-1 adsorbents.
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska industrija
T1  - Aflatoxin b-1 adsorption by the natural aluminosilicates - concentrate of montmorillonite and zeolite
EP  - 524
IS  - 5
SP  - 519
VL  - 70
DO  - 10.2298/HEMIND150515058M
UR  - conv_778
ER  - 

@article{
author = "Marković, Marija and Daković, Aleksandra and Rottinghaus, George E. and Stojanović, Mirjana and Dondur, Vera and Kragović, Milan and Gulišija, Zvonko",
year = "2016",
abstract = "Aflatoxin B-1 adsorption by the concentrate of bentonite clay - montmorillonite and the natural zeolite -clinoptilolite and was investigated at the initial toxin concentration of 4 ppm, with different amounts of solid phase in suspension (1, 0.5, 0.2 and 0.1 g/L) and different pH values - 3, 7 and 9. Results indicated that for both minerals, decreasing the amount of solid phase in suspension, decrease the amount of active sites relevant for adsorption of aflatoxin B-1. Thus, for concentrate of montnorillonite, at the lowest level of solid phase in suspension (0.1 g/L), aflatoxin B-1 adsorption indexes were 97% at pH 3, 88% at pH 7 and 82% at pH 9, while for the natural zeolite, adsorption of toxin was 9% at pH 3 and 7% at pH 7 and 9. Since inorganic cations in minerals are mainly responsible for aflatoxin B-1 adsorption, even the natural zeolite - clinoptilite has much higher cation exchange capacity (the content of inorganic exchangeable cations) compared to the concentrate of montmorillonite, adsorption of aflatoxin B-1 by this mineral is much lower. Comparing the molecular dimensions of aflatoxin B-1 molecule with the dimension of channels of clinoptilolite and interlamellar space of montmorillonite it is obvious that this toxin is adsorbed only at the external surface of clinoptilolite while in the montmorillonite all active sites are equally available for its adsorption. Thus, the concentrate of montmorillonite possesses higher adsorption capacity for aflatoxin B-1. Results presented in this paper confirmed the fact that the differences in the structure of minerals led to their different efficiency for adsorption of aflatoxin B-1. Mineralogical and chemical composition, determination of cation exchange capacity, etc., are very important parameters influencing the effectiveness of minerals as aflatoxin B-1 adsorbents.",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska industrija",
title = "Aflatoxin b-1 adsorption by the natural aluminosilicates - concentrate of montmorillonite and zeolite",
pages = "524-519",
number = "5",
volume = "70",
doi = "10.2298/HEMIND150515058M",
url = "conv_778"
}

Marković, M., Daković, A., Rottinghaus, G. E., Stojanović, M., Dondur, V., Kragović, M.,& Gulišija, Z.. (2016). Aflatoxin b-1 adsorption by the natural aluminosilicates - concentrate of montmorillonite and zeolite. in Hemijska industrija
Savez hemijskih inženjera, Beograd., 70(5), 519-524.
https://doi.org/10.2298/HEMIND150515058M
conv_778

Marković M, Daković A, Rottinghaus GE, Stojanović M, Dondur V, Kragović M, Gulišija Z. Aflatoxin b-1 adsorption by the natural aluminosilicates - concentrate of montmorillonite and zeolite. in Hemijska industrija. 2016;70(5):519-524.
doi:10.2298/HEMIND150515058M
conv_778 .

Marković, Marija, Daković, Aleksandra, Rottinghaus, George E., Stojanović, Mirjana, Dondur, Vera, Kragović, Milan, Gulišija, Zvonko, "Aflatoxin b-1 adsorption by the natural aluminosilicates - concentrate of montmorillonite and zeolite" in Hemijska industrija, 70, no. 5 (2016):519-524,
https://doi.org/10.2298/HEMIND150515058M .,
conv_778 .

TY  - JOUR
AU  - Kragović, Milan
AU  - Daković, Aleksandra
AU  - Marković, Marija
AU  - Petković, Anđela
PY  - 2016
UR  - https://ritnms.itnms.ac.rs/handle/123456789/387
AB  - U ovom radu ispitivana je upotreba prirodnog i Fe(III)-modifikovanog zeolite kao aditiva alginatu u cilju poboljšanja njegovih termijskih i pirolitičkih osobina. Za tu namenu korišćeni su uzorci prirodnog (PZA) i Fe(III)-modifikovanog zeolita prekrivenih alginatom (FeA). Sagorevanje uzoraka praćeno je termijskim analitičkim tehnikama, diferencijalnom termijskom analizom (DTA) i termogravimetrijskom analizom (TGA). Uzorci su zagrevani u temperaturskom intervalu od 25 do 1000ºC pri različitim brzinama zagrevanja (od 5 do 20ºC). Na osnovu eksperimentalnih rezultata, merenjem gubitka mase, termijsko razlaganje natrijum alginata se jasno može podeliti u nekoliko koraka. Na osnovu kinetičkog modela pseudo-prvog reda određeni su kinetički parametri (aktivaciona energija i pred eksponencijalni faktor) koji se odnose na temperaturski interval od 180 do 500ºC. Dobijeni rezultati su pokazali da upotrebljeni zeoliti utiču na termijske osobine alginata kao i da smanjuju aktivacionu energiju potrebnu za njegovu pirolizu sa 87,30 kJ/mol za čist alginat na 72,75 kJ/mol za PZA i 63,35 kJ/mol za FeA. Ova ispitivanja mogu biti korisna za bolje razumevanje termijske stabilnosti alginatnih biokompozita i mogu dati informacije važne za termijske procese biorazgrađujućih materijala.
AB  - In this work, natural and Fe(III)-modified zeolte were tested as additives for alginate in order to improve its thermal and pyrolytic properties. For that purpose the natural zeolite (NZA) and Fe(III)- modified zeolite coated with alginate (FeA) were used. Thermal degradation of the samples was investigated by using thermal analytic techniques, thermogravimetric (TG) and differential thermal analysis (DTA). The samples were heated from 25oC to 1000ºC at different heating rates (from 5 to 20ºC). From experimental results, thermal degradation of the sodium alginate could be clearly separated into several stages based on the weight loss and the weight loss rate. The kinetic parameters (activation energy and pre-exponential factor) for the main degradation phase (from 180 to 500ºC) thus were estimated by using the pseudo first-order assumption. The results showed that used zeolites affected the thermal properties of the alginate and reduce activation energy required for pyrolysis from 87.30 kJ/mol for pure alginate to 72.75 kJ/mol for NZA and 63.35 kJ/mol for FeA. These pyrolysis investigations can be useful for better understanding the thermal stability of these alginate biocomposites and provide necessary information for thermally processing wastes from these biodegradable materials.
PB  - Inženjersko društvo za koroziju, Beograd
T2  - Zaštita materijala
T1  - Kinetika termijskog razlaganja kompozita alginata i zeolita
T1  - Kinetic of thermal degradation of alginate-zeolite composites
EP  - 564
IS  - 4
SP  - 559
VL  - 57
DO  - 10.5937/ZasMat1604559K
UR  - conv_149
ER  - 

@article{
author = "Kragović, Milan and Daković, Aleksandra and Marković, Marija and Petković, Anđela",
year = "2016",
abstract = "U ovom radu ispitivana je upotreba prirodnog i Fe(III)-modifikovanog zeolite kao aditiva alginatu u cilju poboljšanja njegovih termijskih i pirolitičkih osobina. Za tu namenu korišćeni su uzorci prirodnog (PZA) i Fe(III)-modifikovanog zeolita prekrivenih alginatom (FeA). Sagorevanje uzoraka praćeno je termijskim analitičkim tehnikama, diferencijalnom termijskom analizom (DTA) i termogravimetrijskom analizom (TGA). Uzorci su zagrevani u temperaturskom intervalu od 25 do 1000ºC pri različitim brzinama zagrevanja (od 5 do 20ºC). Na osnovu eksperimentalnih rezultata, merenjem gubitka mase, termijsko razlaganje natrijum alginata se jasno može podeliti u nekoliko koraka. Na osnovu kinetičkog modela pseudo-prvog reda određeni su kinetički parametri (aktivaciona energija i pred eksponencijalni faktor) koji se odnose na temperaturski interval od 180 do 500ºC. Dobijeni rezultati su pokazali da upotrebljeni zeoliti utiču na termijske osobine alginata kao i da smanjuju aktivacionu energiju potrebnu za njegovu pirolizu sa 87,30 kJ/mol za čist alginat na 72,75 kJ/mol za PZA i 63,35 kJ/mol za FeA. Ova ispitivanja mogu biti korisna za bolje razumevanje termijske stabilnosti alginatnih biokompozita i mogu dati informacije važne za termijske procese biorazgrađujućih materijala., In this work, natural and Fe(III)-modified zeolte were tested as additives for alginate in order to improve its thermal and pyrolytic properties. For that purpose the natural zeolite (NZA) and Fe(III)- modified zeolite coated with alginate (FeA) were used. Thermal degradation of the samples was investigated by using thermal analytic techniques, thermogravimetric (TG) and differential thermal analysis (DTA). The samples were heated from 25oC to 1000ºC at different heating rates (from 5 to 20ºC). From experimental results, thermal degradation of the sodium alginate could be clearly separated into several stages based on the weight loss and the weight loss rate. The kinetic parameters (activation energy and pre-exponential factor) for the main degradation phase (from 180 to 500ºC) thus were estimated by using the pseudo first-order assumption. The results showed that used zeolites affected the thermal properties of the alginate and reduce activation energy required for pyrolysis from 87.30 kJ/mol for pure alginate to 72.75 kJ/mol for NZA and 63.35 kJ/mol for FeA. These pyrolysis investigations can be useful for better understanding the thermal stability of these alginate biocomposites and provide necessary information for thermally processing wastes from these biodegradable materials.",
publisher = "Inženjersko društvo za koroziju, Beograd",
journal = "Zaštita materijala",
title = "Kinetika termijskog razlaganja kompozita alginata i zeolita, Kinetic of thermal degradation of alginate-zeolite composites",
pages = "564-559",
number = "4",
volume = "57",
doi = "10.5937/ZasMat1604559K",
url = "conv_149"
}

Kragović, M., Daković, A., Marković, M.,& Petković, A.. (2016). Kinetika termijskog razlaganja kompozita alginata i zeolita. in Zaštita materijala
Inženjersko društvo za koroziju, Beograd., 57(4), 559-564.
https://doi.org/10.5937/ZasMat1604559K
conv_149

Kragović M, Daković A, Marković M, Petković A. Kinetika termijskog razlaganja kompozita alginata i zeolita. in Zaštita materijala. 2016;57(4):559-564.
doi:10.5937/ZasMat1604559K
conv_149 .

Kragović, Milan, Daković, Aleksandra, Marković, Marija, Petković, Anđela, "Kinetika termijskog razlaganja kompozita alginata i zeolita" in Zaštita materijala, 57, no. 4 (2016):559-564,
https://doi.org/10.5937/ZasMat1604559K .,
conv_149 .

TY  - JOUR
AU  - Marković, Marija
AU  - Daković, Aleksandra
AU  - Krajišnik, Danina
AU  - Kragović, Milan
AU  - Milić, Jela
AU  - Langella, Alessio
AU  - de Gennaro, Bruno
AU  - Cappelletti, Piergiulio
AU  - Mercurio, Mariano
PY  - 2016
UR  - https://ritnms.itnms.ac.rs/handle/123456789/400
AB  - Incorporation of diclofenac sodium into phillipsite modified with cetylpyridinium chloride (CP-Cl) or hexadecyltrimethyl ammonium bromide (HDTMA-Br) was followed by batch equilibrium adsorption studies in buffer solution at pH = 7.4. Characteristics of the drug/surfactant/zeolite complexes were investigated by UV/VIS, FTIR spectroscopy, thermal (DTA/TG) analysis and-potential measurements. The obtained data confirmed that organic cations at phillipsite surface were responsible for incorporation of diclofenac sodium. Diclofenac sodium incorporated amounts increased with increasing the amount of each surfactant as well as with increasing the initial drug concentration. Langmuir model was the best model for fitting the experimental data of diclofenac adsorption on surfactant/phillipsite composites, suggesting complex adsorption mechanism. The physico-chemical properties of surfactant/phillipsite composites and enhanced incorporation of diclofenac sodium suggests that it might be possible to use these materials as drug carriers.
PB  - Elsevier, Amsterdam
T2  - Journal of Molecular Liquids
T1  - Evaluation of the surfactant/phillipsite composites as carriers for diclofenac sodium
EP  - 716
SP  - 711
VL  - 222
DO  - 10.1016/j.molliq.2016.07.127
UR  - conv_772
ER  - 

@article{
author = "Marković, Marija and Daković, Aleksandra and Krajišnik, Danina and Kragović, Milan and Milić, Jela and Langella, Alessio and de Gennaro, Bruno and Cappelletti, Piergiulio and Mercurio, Mariano",
year = "2016",
abstract = "Incorporation of diclofenac sodium into phillipsite modified with cetylpyridinium chloride (CP-Cl) or hexadecyltrimethyl ammonium bromide (HDTMA-Br) was followed by batch equilibrium adsorption studies in buffer solution at pH = 7.4. Characteristics of the drug/surfactant/zeolite complexes were investigated by UV/VIS, FTIR spectroscopy, thermal (DTA/TG) analysis and-potential measurements. The obtained data confirmed that organic cations at phillipsite surface were responsible for incorporation of diclofenac sodium. Diclofenac sodium incorporated amounts increased with increasing the amount of each surfactant as well as with increasing the initial drug concentration. Langmuir model was the best model for fitting the experimental data of diclofenac adsorption on surfactant/phillipsite composites, suggesting complex adsorption mechanism. The physico-chemical properties of surfactant/phillipsite composites and enhanced incorporation of diclofenac sodium suggests that it might be possible to use these materials as drug carriers.",
publisher = "Elsevier, Amsterdam",
journal = "Journal of Molecular Liquids",
title = "Evaluation of the surfactant/phillipsite composites as carriers for diclofenac sodium",
pages = "716-711",
volume = "222",
doi = "10.1016/j.molliq.2016.07.127",
url = "conv_772"
}

Marković, M., Daković, A., Krajišnik, D., Kragović, M., Milić, J., Langella, A., de Gennaro, B., Cappelletti, P.,& Mercurio, M.. (2016). Evaluation of the surfactant/phillipsite composites as carriers for diclofenac sodium. in Journal of Molecular Liquids
Elsevier, Amsterdam., 222, 711-716.
https://doi.org/10.1016/j.molliq.2016.07.127
conv_772

Marković M, Daković A, Krajišnik D, Kragović M, Milić J, Langella A, de Gennaro B, Cappelletti P, Mercurio M. Evaluation of the surfactant/phillipsite composites as carriers for diclofenac sodium. in Journal of Molecular Liquids. 2016;222:711-716.
doi:10.1016/j.molliq.2016.07.127
conv_772 .

Marković, Marija, Daković, Aleksandra, Krajišnik, Danina, Kragović, Milan, Milić, Jela, Langella, Alessio, de Gennaro, Bruno, Cappelletti, Piergiulio, Mercurio, Mariano, "Evaluation of the surfactant/phillipsite composites as carriers for diclofenac sodium" in Journal of Molecular Liquids, 222 (2016):711-716,
https://doi.org/10.1016/j.molliq.2016.07.127 .,
conv_772 .

TY  - JOUR
AU  - Milojković, Jelena
AU  - Pezo, Lato
AU  - Stojanović, Mirjana
AU  - Mihajlović, Marija
AU  - Lopičić, Zorica
AU  - Petrović, Jelena
AU  - Stanojević, Marija
AU  - Kragović, Milan
PY  - 2016
UR  - https://ritnms.itnms.ac.rs/handle/123456789/390
AB  - In this study adsorption characteristics of lead, copper, cadmium, nickel and zinc ions onto the compost of Myriophyllum spicatum were examined. The effects of sorbent dose, duration of sorption and solution concentration on the sorption of heavy metals have been investigated. Scanning electron microscope (SEM) and thermogravimetric and differential thermal analysis (TG-DTA) were used for the characterization of this biosorbent. Low coefficients of variation have been obtained for each applied assay, which confirmed the high accuracy of measurements. Principal component analysis (PCA) was applied for differentiation of samples. Mathematical models (form of second order polynomials) were developed for prediction of adsorption. Score analysis is being useful for accessing the effect of process parameters and the tool for determination of sorption quality. On the basic of experimental results and model parameters, it can be concluded that compost has a high biosorption capacity can be utilized for the removal of selected metals from wastewater.
PB  - Elsevier Science Bv, Amsterdam
T2  - Ecological Engineering
T1  - Selected heavy metal biosorption by compost of Myriophyllum spicatum-A chemometric approach
EP  - 119
SP  - 112
VL  - 93
DO  - 10.1016/j.ecoleng.2016.05.012
UR  - conv_760
ER  - 

@article{
author = "Milojković, Jelena and Pezo, Lato and Stojanović, Mirjana and Mihajlović, Marija and Lopičić, Zorica and Petrović, Jelena and Stanojević, Marija and Kragović, Milan",
year = "2016",
abstract = "In this study adsorption characteristics of lead, copper, cadmium, nickel and zinc ions onto the compost of Myriophyllum spicatum were examined. The effects of sorbent dose, duration of sorption and solution concentration on the sorption of heavy metals have been investigated. Scanning electron microscope (SEM) and thermogravimetric and differential thermal analysis (TG-DTA) were used for the characterization of this biosorbent. Low coefficients of variation have been obtained for each applied assay, which confirmed the high accuracy of measurements. Principal component analysis (PCA) was applied for differentiation of samples. Mathematical models (form of second order polynomials) were developed for prediction of adsorption. Score analysis is being useful for accessing the effect of process parameters and the tool for determination of sorption quality. On the basic of experimental results and model parameters, it can be concluded that compost has a high biosorption capacity can be utilized for the removal of selected metals from wastewater.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Ecological Engineering",
title = "Selected heavy metal biosorption by compost of Myriophyllum spicatum-A chemometric approach",
pages = "119-112",
volume = "93",
doi = "10.1016/j.ecoleng.2016.05.012",
url = "conv_760"
}

Milojković, J., Pezo, L., Stojanović, M., Mihajlović, M., Lopičić, Z., Petrović, J., Stanojević, M.,& Kragović, M.. (2016). Selected heavy metal biosorption by compost of Myriophyllum spicatum-A chemometric approach. in Ecological Engineering
Elsevier Science Bv, Amsterdam., 93, 112-119.
https://doi.org/10.1016/j.ecoleng.2016.05.012
conv_760

Milojković J, Pezo L, Stojanović M, Mihajlović M, Lopičić Z, Petrović J, Stanojević M, Kragović M. Selected heavy metal biosorption by compost of Myriophyllum spicatum-A chemometric approach. in Ecological Engineering. 2016;93:112-119.
doi:10.1016/j.ecoleng.2016.05.012
conv_760 .

Milojković, Jelena, Pezo, Lato, Stojanović, Mirjana, Mihajlović, Marija, Lopičić, Zorica, Petrović, Jelena, Stanojević, Marija, Kragović, Milan, "Selected heavy metal biosorption by compost of Myriophyllum spicatum-A chemometric approach" in Ecological Engineering, 93 (2016):112-119,
https://doi.org/10.1016/j.ecoleng.2016.05.012 .,
conv_760 .

TY  - CONF
AU  - Kragović, Milan
AU  - Daković, Aleksandra
AU  - Marković, Marija
AU  - Stojanović, Mirjana
AU  - Petrović, Jelena
AU  - Dondur, Vera
AU  - Jović, Aleksandar
PY  - 2015
UR  - https://ritnms.itnms.ac.rs/handle/123456789/697
AB  - The efficiency of the natural and Fe(III)-modified zeolite for Pb2+ removal at different initial
pH (2.5, 4.2 and 5.0) was investigated. For initial pH 2.5, for all concentrations and both
adsorbents ion exchange of inorganic cations in zeolites with lead ions, together with uptake of
hydrogen occurred. For initial pH 5.0 it was determined that at lower initial concentrations of
lead ion, ion exchange occurred, while at higher initial concentrations beside these processes,
chemisorption of lead ions occurred on both adsorbents. Preliminary experiments on waste
water obtained after flotation process in facility of lead and zinc mine showed that waste water
treatment with both adsorbents reduced the content of all investigated heavy metal cations.
However, better removal was achieved with the Fe(III)-modified zeolite.
PB  - Croatian Zeolite Association
C3  - 6th Croatian-Slovenian-Serbian Symposium on Zeolites
T1  - Removal of lead ions from simulated and real pollutant solutions by using the natural and Fe(III)-modified zeolite
EP  - 68
SP  - 65
ER  - 

@conference{
author = "Kragović, Milan and Daković, Aleksandra and Marković, Marija and Stojanović, Mirjana and Petrović, Jelena and Dondur, Vera and Jović, Aleksandar",
year = "2015",
abstract = "The efficiency of the natural and Fe(III)-modified zeolite for Pb2+ removal at different initial
pH (2.5, 4.2 and 5.0) was investigated. For initial pH 2.5, for all concentrations and both
adsorbents ion exchange of inorganic cations in zeolites with lead ions, together with uptake of
hydrogen occurred. For initial pH 5.0 it was determined that at lower initial concentrations of
lead ion, ion exchange occurred, while at higher initial concentrations beside these processes,
chemisorption of lead ions occurred on both adsorbents. Preliminary experiments on waste
water obtained after flotation process in facility of lead and zinc mine showed that waste water
treatment with both adsorbents reduced the content of all investigated heavy metal cations.
However, better removal was achieved with the Fe(III)-modified zeolite.",
publisher = "Croatian Zeolite Association",
journal = "6th Croatian-Slovenian-Serbian Symposium on Zeolites",
title = "Removal of lead ions from simulated and real pollutant solutions by using the natural and Fe(III)-modified zeolite",
pages = "68-65"
}

Kragović, M., Daković, A., Marković, M., Stojanović, M., Petrović, J., Dondur, V.,& Jović, A.. (2015). Removal of lead ions from simulated and real pollutant solutions by using the natural and Fe(III)-modified zeolite. in 6th Croatian-Slovenian-Serbian Symposium on Zeolites
Croatian Zeolite Association., 65-68.

Kragović M, Daković A, Marković M, Stojanović M, Petrović J, Dondur V, Jović A. Removal of lead ions from simulated and real pollutant solutions by using the natural and Fe(III)-modified zeolite. in 6th Croatian-Slovenian-Serbian Symposium on Zeolites. 2015;:65-68..

Kragović, Milan, Daković, Aleksandra, Marković, Marija, Stojanović, Mirjana, Petrović, Jelena, Dondur, Vera, Jović, Aleksandar, "Removal of lead ions from simulated and real pollutant solutions by using the natural and Fe(III)-modified zeolite" in 6th Croatian-Slovenian-Serbian Symposium on Zeolites (2015):65-68.

TY  - JOUR
AU  - Krajišnik, Danina
AU  - Daković, Aleksandra
AU  - Malenović, Anđelija
AU  - Kragović, Milan
AU  - Milić, Jela
PY  - 2015
UR  - https://ritnms.itnms.ac.rs/handle/123456789/348
AB  - The sorption of ibuprofen by modified natural zeolite composites at three concentration levels (10, 20 and 30 mmol/100 g) of cationic surfactants - benzalkonium chloride and cetylpyridinium chloride, in a buffer solution (pH 7.4), was studied. Characterization of the composites before and after ibuprofen sorption was performed by drug sorption and isotherm studies, zeta potential and Fourier Transform infrared spectroscopic analysis. The biopharmaceutical performance of cationic surfactant-modified zeolites as drug formulation excipients was evaluated by in vitro dissolution experiments from the composites with medium surfactant contents. The drug sorption was influenced by the surfactant type and amount used for the zeolite modification. Prolonged drug release over a period of 8 h (up to similar to 40%) was achieved with both groups of samples. The kinetic analysis showed that the drug release profiles were best fitted with the Higuchi and the Bhaskar models, indicating a combination of drug diffusion and ion exchange as the predominant release mechanisms.
PB  - Mineralogical Soc, Twickenham
T2  - Clay Minerals
T1  - Ibuprofen sorption and release by modified natural zeolites as prospective drug carriers
EP  - 22
IS  - 1
SP  - 11
VL  - 50
DO  - 10.1180/claymin.2015.050.1.02
UR  - conv_740
ER  - 

@article{
author = "Krajišnik, Danina and Daković, Aleksandra and Malenović, Anđelija and Kragović, Milan and Milić, Jela",
year = "2015",
abstract = "The sorption of ibuprofen by modified natural zeolite composites at three concentration levels (10, 20 and 30 mmol/100 g) of cationic surfactants - benzalkonium chloride and cetylpyridinium chloride, in a buffer solution (pH 7.4), was studied. Characterization of the composites before and after ibuprofen sorption was performed by drug sorption and isotherm studies, zeta potential and Fourier Transform infrared spectroscopic analysis. The biopharmaceutical performance of cationic surfactant-modified zeolites as drug formulation excipients was evaluated by in vitro dissolution experiments from the composites with medium surfactant contents. The drug sorption was influenced by the surfactant type and amount used for the zeolite modification. Prolonged drug release over a period of 8 h (up to similar to 40%) was achieved with both groups of samples. The kinetic analysis showed that the drug release profiles were best fitted with the Higuchi and the Bhaskar models, indicating a combination of drug diffusion and ion exchange as the predominant release mechanisms.",
publisher = "Mineralogical Soc, Twickenham",
journal = "Clay Minerals",
title = "Ibuprofen sorption and release by modified natural zeolites as prospective drug carriers",
pages = "22-11",
number = "1",
volume = "50",
doi = "10.1180/claymin.2015.050.1.02",
url = "conv_740"
}

Krajišnik, D., Daković, A., Malenović, A., Kragović, M.,& Milić, J.. (2015). Ibuprofen sorption and release by modified natural zeolites as prospective drug carriers. in Clay Minerals
Mineralogical Soc, Twickenham., 50(1), 11-22.
https://doi.org/10.1180/claymin.2015.050.1.02
conv_740

Krajišnik D, Daković A, Malenović A, Kragović M, Milić J. Ibuprofen sorption and release by modified natural zeolites as prospective drug carriers. in Clay Minerals. 2015;50(1):11-22.
doi:10.1180/claymin.2015.050.1.02
conv_740 .

Krajišnik, Danina, Daković, Aleksandra, Malenović, Anđelija, Kragović, Milan, Milić, Jela, "Ibuprofen sorption and release by modified natural zeolites as prospective drug carriers" in Clay Minerals, 50, no. 1 (2015):11-22,
https://doi.org/10.1180/claymin.2015.050.1.02 .,
conv_740 .

TY  - JOUR
AU  - Šoštarić, Tatjana
AU  - Petrović, Marija
AU  - Petrović, Jelena
AU  - Milojković, Jelena
AU  - Kragović, Milan
AU  - Lačnjevac, Časlav
AU  - Stojanović, Mirjana
PY  - 2015
UR  - https://ritnms.itnms.ac.rs/handle/123456789/366
AB  - U radu je ispitan uticaj hemijske modifikacije, primenom NaOH, na strukturne promene lignoceluloznog ostatka koštica kajsije (KK) i na adsorpcioni kapacitet biomaterijala prema jonima bakra. Biomaterijal pre i posle hemijskog tretman ispitan je skenirajućom elektronskom mikroskopijom (SEM) i Furijeovom transformacionom infracrvenom spektroskopijom (FTIR). SEM je pokazao da nakon hemijskog tretmana struktura materijala je rapavija kao posledica uklanjanja voska, masti i ostalih nečistoća i pristupačnija molekulima vode i jonima bakra. FTIR analiza je pokazala da pik koji se kod prirodnog materijala javlja na 1735 cm-1 (ukazuje na valencionu vibraciju -C=O veze, koja potiče od karboksilnih grupa ili estra ili voskova i masti) kod modifikovanog materijala je značajno redukovan. Određivanjem tačke nultog potencijala utvrđeno je da je posle modifikacije došlo do promene naelektrisanja površine materijala (pHpzc kod KK je 4,9 a kod KKM je 6,0). Kao posledica tretmana, promene koje su se dogodile uslovile su pet puta veči adsorpcioni kapacit kod modifikovanog (10,8 mg/g) u odnosu na prirodni biomaterijal (2,5 mg/g).
AB  - This paper deals with investigation of alkali treatment effect on structural changes of apricot stones lingo-cellulosic residue (KK) and on adsorption capacity based on adsorption of Cu(II) ions from wastewater. Characterization of natural and alkali treated biomaterial were done by FT-IR and SEM. SEM micrographs showed that the removal of the surface impurities after treatment, improves the surface roughness of KK thus opening more hydroxyl groups and other reactive functional groups on the surface. FT-IR spectrum showed that the peak at 1735 cm-1 from of untreated KK, which is assigned to aromatic carbonyl or carboxyl C=O stretching of carboxylic acids or their esters, was reduced after treatment. After treatment change of point of zero charge value of modified biomaterial was evident: from pHPzc=4.9 (KK) to pHPzc=6.0 (KKM). Overall, the changes made by alkali treatment of KK, resulted in five times higher adsorption capacity.
PB  - Inženjersko društvo za koroziju, Beograd
T2  - Zaštita materijala
T1  - Uticaj hemijske modifikacije na adsorpcione karakteristike biosorbenta na bazi koštica kajsija
T1  - Effect of chemical treatment on adsorption characteristics of apricot stone biosorbent
EP  - 328
IS  - 3
SP  - 321
VL  - 56
DO  - 10.5937/ZasMat1503321S
UR  - conv_144
ER  - 

@article{
author = "Šoštarić, Tatjana and Petrović, Marija and Petrović, Jelena and Milojković, Jelena and Kragović, Milan and Lačnjevac, Časlav and Stojanović, Mirjana",
year = "2015",
abstract = "U radu je ispitan uticaj hemijske modifikacije, primenom NaOH, na strukturne promene lignoceluloznog ostatka koštica kajsije (KK) i na adsorpcioni kapacitet biomaterijala prema jonima bakra. Biomaterijal pre i posle hemijskog tretman ispitan je skenirajućom elektronskom mikroskopijom (SEM) i Furijeovom transformacionom infracrvenom spektroskopijom (FTIR). SEM je pokazao da nakon hemijskog tretmana struktura materijala je rapavija kao posledica uklanjanja voska, masti i ostalih nečistoća i pristupačnija molekulima vode i jonima bakra. FTIR analiza je pokazala da pik koji se kod prirodnog materijala javlja na 1735 cm-1 (ukazuje na valencionu vibraciju -C=O veze, koja potiče od karboksilnih grupa ili estra ili voskova i masti) kod modifikovanog materijala je značajno redukovan. Određivanjem tačke nultog potencijala utvrđeno je da je posle modifikacije došlo do promene naelektrisanja površine materijala (pHpzc kod KK je 4,9 a kod KKM je 6,0). Kao posledica tretmana, promene koje su se dogodile uslovile su pet puta veči adsorpcioni kapacit kod modifikovanog (10,8 mg/g) u odnosu na prirodni biomaterijal (2,5 mg/g)., This paper deals with investigation of alkali treatment effect on structural changes of apricot stones lingo-cellulosic residue (KK) and on adsorption capacity based on adsorption of Cu(II) ions from wastewater. Characterization of natural and alkali treated biomaterial were done by FT-IR and SEM. SEM micrographs showed that the removal of the surface impurities after treatment, improves the surface roughness of KK thus opening more hydroxyl groups and other reactive functional groups on the surface. FT-IR spectrum showed that the peak at 1735 cm-1 from of untreated KK, which is assigned to aromatic carbonyl or carboxyl C=O stretching of carboxylic acids or their esters, was reduced after treatment. After treatment change of point of zero charge value of modified biomaterial was evident: from pHPzc=4.9 (KK) to pHPzc=6.0 (KKM). Overall, the changes made by alkali treatment of KK, resulted in five times higher adsorption capacity.",
publisher = "Inženjersko društvo za koroziju, Beograd",
journal = "Zaštita materijala",
title = "Uticaj hemijske modifikacije na adsorpcione karakteristike biosorbenta na bazi koštica kajsija, Effect of chemical treatment on adsorption characteristics of apricot stone biosorbent",
pages = "328-321",
number = "3",
volume = "56",
doi = "10.5937/ZasMat1503321S",
url = "conv_144"
}

Šoštarić, T., Petrović, M., Petrović, J., Milojković, J., Kragović, M., Lačnjevac, Č.,& Stojanović, M.. (2015). Uticaj hemijske modifikacije na adsorpcione karakteristike biosorbenta na bazi koštica kajsija. in Zaštita materijala
Inženjersko društvo za koroziju, Beograd., 56(3), 321-328.
https://doi.org/10.5937/ZasMat1503321S
conv_144

Šoštarić T, Petrović M, Petrović J, Milojković J, Kragović M, Lačnjevac Č, Stojanović M. Uticaj hemijske modifikacije na adsorpcione karakteristike biosorbenta na bazi koštica kajsija. in Zaštita materijala. 2015;56(3):321-328.
doi:10.5937/ZasMat1503321S
conv_144 .

Šoštarić, Tatjana, Petrović, Marija, Petrović, Jelena, Milojković, Jelena, Kragović, Milan, Lačnjevac, Časlav, Stojanović, Mirjana, "Uticaj hemijske modifikacije na adsorpcione karakteristike biosorbenta na bazi koštica kajsija" in Zaštita materijala, 56, no. 3 (2015):321-328,
https://doi.org/10.5937/ZasMat1503321S .,
conv_144 .

TY  - JOUR
AU  - Sekulić, Živko
AU  - Kolonja, Božo M.
AU  - Kragović, Milan
AU  - Ivošević, Branislav
AU  - Mihajlović, Slavica
PY  - 2014
UR  - https://ritnms.itnms.ac.rs/handle/123456789/312
AB  - Testing of the quality of zeolite from the Igros and Donje Jesenje deposits was carried out by size classes. The objective of the testing was to point out the importance of the selection of the preparation procedure in determining the quality of individual size classes provide the required quality of zeolite product range. The results indicate that the Igros and Donje Jesenje zeolite deposits differ by the quality of some size classes. While the Igros sample has better quality of fine size classes, in the case of the Donje Jesenje deposit, the sample size class -2.4 +0.4 mm indicates better quality. Specifically, the cation exchange capacity (CEC) of the Igros zeolite is the highest at 161.25 meq/100g in the case of size class -5 +2.4 mm, while the highest CEC of zeolite from the Donje Jesenje deposits, 163.97 meq/100g, was found for the class -0.4 +0.063 mm. The results of XRD analyses showed that the mineral content was distributed differently in the Igros sample relative to the Donje Jesenje sample. The XRPD results showed a higher content of zeolite minerals in coarse size classes of the Igros sample, while in the Donje Jasenje zeolite, the size class of -0.063 +0 mm, and the presence of feldspar and lower content of clinoptilotite were observed. These results indicate that it is necessary to use the methods for obtaining finer size classes and classification in order to achieve the required quality of zeolite product range.
PB  - Polska Akad Nauk, Polish Acad Sciences, Miner & Energy Econ Res Inst Pas, Warszawa
T2  - Gospodarka Surowcami Mineralnymi-Mineral Resources Management
T1  - Quality of Zeolite in the Function of Size Class
EP  - 16
IS  - 3
SP  - 5
VL  - 30
DO  - 10.2478/gospo-2014-0028
UR  - conv_707
ER  - 

@article{
author = "Sekulić, Živko and Kolonja, Božo M. and Kragović, Milan and Ivošević, Branislav and Mihajlović, Slavica",
year = "2014",
abstract = "Testing of the quality of zeolite from the Igros and Donje Jesenje deposits was carried out by size classes. The objective of the testing was to point out the importance of the selection of the preparation procedure in determining the quality of individual size classes provide the required quality of zeolite product range. The results indicate that the Igros and Donje Jesenje zeolite deposits differ by the quality of some size classes. While the Igros sample has better quality of fine size classes, in the case of the Donje Jesenje deposit, the sample size class -2.4 +0.4 mm indicates better quality. Specifically, the cation exchange capacity (CEC) of the Igros zeolite is the highest at 161.25 meq/100g in the case of size class -5 +2.4 mm, while the highest CEC of zeolite from the Donje Jesenje deposits, 163.97 meq/100g, was found for the class -0.4 +0.063 mm. The results of XRD analyses showed that the mineral content was distributed differently in the Igros sample relative to the Donje Jesenje sample. The XRPD results showed a higher content of zeolite minerals in coarse size classes of the Igros sample, while in the Donje Jasenje zeolite, the size class of -0.063 +0 mm, and the presence of feldspar and lower content of clinoptilotite were observed. These results indicate that it is necessary to use the methods for obtaining finer size classes and classification in order to achieve the required quality of zeolite product range.",
publisher = "Polska Akad Nauk, Polish Acad Sciences, Miner & Energy Econ Res Inst Pas, Warszawa",
journal = "Gospodarka Surowcami Mineralnymi-Mineral Resources Management",
title = "Quality of Zeolite in the Function of Size Class",
pages = "16-5",
number = "3",
volume = "30",
doi = "10.2478/gospo-2014-0028",
url = "conv_707"
}

Sekulić, Ž., Kolonja, B. M., Kragović, M., Ivošević, B.,& Mihajlović, S.. (2014). Quality of Zeolite in the Function of Size Class. in Gospodarka Surowcami Mineralnymi-Mineral Resources Management
Polska Akad Nauk, Polish Acad Sciences, Miner & Energy Econ Res Inst Pas, Warszawa., 30(3), 5-16.
https://doi.org/10.2478/gospo-2014-0028
conv_707

Sekulić Ž, Kolonja BM, Kragović M, Ivošević B, Mihajlović S. Quality of Zeolite in the Function of Size Class. in Gospodarka Surowcami Mineralnymi-Mineral Resources Management. 2014;30(3):5-16.
doi:10.2478/gospo-2014-0028
conv_707 .

Sekulić, Živko, Kolonja, Božo M., Kragović, Milan, Ivošević, Branislav, Mihajlović, Slavica, "Quality of Zeolite in the Function of Size Class" in Gospodarka Surowcami Mineralnymi-Mineral Resources Management, 30, no. 3 (2014):5-16,
https://doi.org/10.2478/gospo-2014-0028 .,
conv_707 .

TY  - JOUR
AU  - Sekulić, Živko
AU  - Kragović, Milan
AU  - Kolonja, Božo M.
AU  - Terzić, Anja
AU  - Mihajlović, Slavica
PY  - 2014
UR  - https://ritnms.itnms.ac.rs/handle/123456789/291
PB  - Bauverlag BV GmbH
T2  - ZKG International
T1  - Natural, modified and saturated zeolites as additives in Portland cement
EP  - 56
IS  - 12
SP  - 49
VL  - 67
UR  - https://hdl.handle.net/21.15107/rcub_rims_249
UR  - conv_1047
ER  - 

@article{
author = "Sekulić, Živko and Kragović, Milan and Kolonja, Božo M. and Terzić, Anja and Mihajlović, Slavica",
year = "2014",
publisher = "Bauverlag BV GmbH",
journal = "ZKG International",
title = "Natural, modified and saturated zeolites as additives in Portland cement",
pages = "56-49",
number = "12",
volume = "67",
url = "https://hdl.handle.net/21.15107/rcub_rims_249, conv_1047"
}

Sekulić, Ž., Kragović, M., Kolonja, B. M., Terzić, A.,& Mihajlović, S.. (2014). Natural, modified and saturated zeolites as additives in Portland cement. in ZKG International
Bauverlag BV GmbH., 67(12), 49-56.
https://hdl.handle.net/21.15107/rcub_rims_249

Sekulić Ž, Kragović M, Kolonja BM, Terzić A, Mihajlović S. Natural, modified and saturated zeolites as additives in Portland cement. in ZKG International. 2014;67(12):49-56.
https://hdl.handle.net/21.15107/rcub_rims_249 .

Sekulić, Živko, Kragović, Milan, Kolonja, Božo M., Terzić, Anja, Mihajlović, Slavica, "Natural, modified and saturated zeolites as additives in Portland cement" in ZKG International, 67, no. 12 (2014):49-56,
https://hdl.handle.net/21.15107/rcub_rims_249 .

TY  - JOUR
AU  - Sekulić, Živko
AU  - Daković, Aleksandra
AU  - Kragović, Milan
AU  - Marković, Marija
AU  - Ivošević, Branislav
AU  - Kolonja, Božo M.
PY  - 2013
UR  - https://ritnms.itnms.ac.rs/handle/123456789/276
AB  - Obavljena su ispitivanja kvaliteta polaznog uzorka i kvaliteta pojedinih klasa krupnoće na uzorku prirodnog zeolita iz ležišta Zlatokop (okolina Vranjske Banje, Srbija). Cilj ispitivanja je bio da se utvrdi homogenost kvaliteta zeolita u pogledu klasa krupnoće i da li se odvajanjem neke klase lošijeg kvaliteta može izdvojiti klasa sa višim sadržajem osnovnog minerala - klinoptilolita. Karakterizacija polaznog zeolita, kao i određenih klasa krupnoće je urađena određivanjem hemijskog sastava, sadržaja oksida CaO+MgO+Na2O+K2O kao i kapaciteta katjonske izmene (KKI) kao i korišćenjem XRD analize. Dobijeni rezultati su ukazali da sve analizirane klase krupnoće (-2+0,8; -0,8+0,6; -0,6+0,4; -0,4+0,1; -0,1+0; -0,3+0,63; -0,63+0 i -0,43+0 mm) imaju dobar kvalitet. Najveće vrednosti kapaciteta katjonske izmene (KKI) imaju klase -0,043+0mm (166,5 meq/100 g) i -0,063+0 mm (158,8 meq/100 g). Rezultati su ukazali da nešto bolji kvalitet zeolita se može postići kada se ove klase izdvajaju prosejavanjem iz polaznog uzorka nego kada se iste dobiju mlevenjem polaznog uzorka na tu finoću.
AB  - This paper presents the results of investigations of the quality of the natural zeolite as well as the quality of specific particle size classes of the natural zeolite. The aim of the investigations was to determine if the different classes possess different qualities. The starting material used in experiments was the natural zeolite from the Zlatokop deposit (Vranjska Banja, Serbia). The classes -0.2+0.8 mm; -0.8+0.6 mm; -0.6+0.4 mm; -0.4+0.1 mm were obtained by wet sieving of the natural zeolite. Grinding processes of the natural zeolite gave classes -0.3+0.63 mm; -0.63+0 mm; -0,43+0 mm. Chemical composition, mineralogical XRPD and cation exchange capacities (CEC) were analyzed for the starting sample and the obtained particle size classes. It was determined that all particle size classes possess similar qualities. The highest cation exchange capacity was observed in classes -0.043+0 mm (166.5 meq/100 g) and -0.063+0 mm (158.8 meq/100 g).
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska industrija
T1  - Kvalitet zeolita iz ležišta Vranjska banja po klasama krupnoće
T1  - Quality of zeolit from Vranjska banja deposit according to size classes
EP  - 669
IS  - 4
SP  - 663
VL  - 67
DO  - 10.2298/HEMIND120724107S
UR  - conv_300
ER  - 

@article{
author = "Sekulić, Živko and Daković, Aleksandra and Kragović, Milan and Marković, Marija and Ivošević, Branislav and Kolonja, Božo M.",
year = "2013",
abstract = "Obavljena su ispitivanja kvaliteta polaznog uzorka i kvaliteta pojedinih klasa krupnoće na uzorku prirodnog zeolita iz ležišta Zlatokop (okolina Vranjske Banje, Srbija). Cilj ispitivanja je bio da se utvrdi homogenost kvaliteta zeolita u pogledu klasa krupnoće i da li se odvajanjem neke klase lošijeg kvaliteta može izdvojiti klasa sa višim sadržajem osnovnog minerala - klinoptilolita. Karakterizacija polaznog zeolita, kao i određenih klasa krupnoće je urađena određivanjem hemijskog sastava, sadržaja oksida CaO+MgO+Na2O+K2O kao i kapaciteta katjonske izmene (KKI) kao i korišćenjem XRD analize. Dobijeni rezultati su ukazali da sve analizirane klase krupnoće (-2+0,8; -0,8+0,6; -0,6+0,4; -0,4+0,1; -0,1+0; -0,3+0,63; -0,63+0 i -0,43+0 mm) imaju dobar kvalitet. Najveće vrednosti kapaciteta katjonske izmene (KKI) imaju klase -0,043+0mm (166,5 meq/100 g) i -0,063+0 mm (158,8 meq/100 g). Rezultati su ukazali da nešto bolji kvalitet zeolita se može postići kada se ove klase izdvajaju prosejavanjem iz polaznog uzorka nego kada se iste dobiju mlevenjem polaznog uzorka na tu finoću., This paper presents the results of investigations of the quality of the natural zeolite as well as the quality of specific particle size classes of the natural zeolite. The aim of the investigations was to determine if the different classes possess different qualities. The starting material used in experiments was the natural zeolite from the Zlatokop deposit (Vranjska Banja, Serbia). The classes -0.2+0.8 mm; -0.8+0.6 mm; -0.6+0.4 mm; -0.4+0.1 mm were obtained by wet sieving of the natural zeolite. Grinding processes of the natural zeolite gave classes -0.3+0.63 mm; -0.63+0 mm; -0,43+0 mm. Chemical composition, mineralogical XRPD and cation exchange capacities (CEC) were analyzed for the starting sample and the obtained particle size classes. It was determined that all particle size classes possess similar qualities. The highest cation exchange capacity was observed in classes -0.043+0 mm (166.5 meq/100 g) and -0.063+0 mm (158.8 meq/100 g).",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska industrija",
title = "Kvalitet zeolita iz ležišta Vranjska banja po klasama krupnoće, Quality of zeolit from Vranjska banja deposit according to size classes",
pages = "669-663",
number = "4",
volume = "67",
doi = "10.2298/HEMIND120724107S",
url = "conv_300"
}

Sekulić, Ž., Daković, A., Kragović, M., Marković, M., Ivošević, B.,& Kolonja, B. M.. (2013). Kvalitet zeolita iz ležišta Vranjska banja po klasama krupnoće. in Hemijska industrija
Savez hemijskih inženjera, Beograd., 67(4), 663-669.
https://doi.org/10.2298/HEMIND120724107S
conv_300

Sekulić Ž, Daković A, Kragović M, Marković M, Ivošević B, Kolonja BM. Kvalitet zeolita iz ležišta Vranjska banja po klasama krupnoće. in Hemijska industrija. 2013;67(4):663-669.
doi:10.2298/HEMIND120724107S
conv_300 .

Sekulić, Živko, Daković, Aleksandra, Kragović, Milan, Marković, Marija, Ivošević, Branislav, Kolonja, Božo M., "Kvalitet zeolita iz ležišta Vranjska banja po klasama krupnoće" in Hemijska industrija, 67, no. 4 (2013):663-669,
https://doi.org/10.2298/HEMIND120724107S .,
conv_300 .