TY  - JOUR
AU  - Banković, Predrag
AU  - Milutinović Nikolić, Aleksandra
AU  - Mojović, Zorica
AU  - Rosić, Aleksandra
AU  - Čupić, Željko
AU  - Lončarević, Davor
AU  - Jovanović, Dušan M.
PY  - 2009
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/484
AB  - The catalytic wet peroxide oxidation (CWPO) of toluene on two bentonite-based AlFe-pillared clays (PILCs) with different iron contents was investigated. The PILCs were obtained using bentonite clay from Bogovina, Serbia. The change in chemical and phase composition and textural properties of the starting clay and synthesized catalysts was monitored using X-ray diffraction, inductively coupled plasma optical emission spectrometry, UV-Vis diffuse reflectance spectrometry, and physisorption of nitrogen. The catalytic performance was examined using gas chromatography. The Na-exchange process lowered the (001) smectite basal plane spacing, but the clay retained its swelling properties, while the pillaring process increased it. The surface areas of both synthesized pillared clays increased to similar values although their Fe content was different. At 37 degrees C, both catalysts show significant toluene degradation, with the one richer in Fe having higher efficiency. The leaching of the active cations during reaction was negligible, and the catalysts were stable. AlFe-pillared clay catalysts can be used in CWPO for the elimination of BTEX compounds from plant effluent streams.
PB  - Science Press, Beijing
T2  - Chinese Journal of Catalysis
T1  - Toluene Degradation in Water Using AlFe-Pillared Clay Catalysts
VL  - 30
IS  - 1
SP  - 14
EP  - 18
DO  - 10.1016/S1872-2067(08)60086-8
ER  - 

@article{
author = "Banković, Predrag and Milutinović Nikolić, Aleksandra and Mojović, Zorica and Rosić, Aleksandra and Čupić, Željko and Lončarević, Davor and Jovanović, Dušan M.",
year = "2009",
abstract = "The catalytic wet peroxide oxidation (CWPO) of toluene on two bentonite-based AlFe-pillared clays (PILCs) with different iron contents was investigated. The PILCs were obtained using bentonite clay from Bogovina, Serbia. The change in chemical and phase composition and textural properties of the starting clay and synthesized catalysts was monitored using X-ray diffraction, inductively coupled plasma optical emission spectrometry, UV-Vis diffuse reflectance spectrometry, and physisorption of nitrogen. The catalytic performance was examined using gas chromatography. The Na-exchange process lowered the (001) smectite basal plane spacing, but the clay retained its swelling properties, while the pillaring process increased it. The surface areas of both synthesized pillared clays increased to similar values although their Fe content was different. At 37 degrees C, both catalysts show significant toluene degradation, with the one richer in Fe having higher efficiency. The leaching of the active cations during reaction was negligible, and the catalysts were stable. AlFe-pillared clay catalysts can be used in CWPO for the elimination of BTEX compounds from plant effluent streams.",
publisher = "Science Press, Beijing",
journal = "Chinese Journal of Catalysis",
title = "Toluene Degradation in Water Using AlFe-Pillared Clay Catalysts",
volume = "30",
number = "1",
pages = "14-18",
doi = "10.1016/S1872-2067(08)60086-8"
}

Banković, P., Milutinović Nikolić, A., Mojović, Z., Rosić, A., Čupić, Ž., Lončarević, D.,& Jovanović, D. M.. (2009). Toluene Degradation in Water Using AlFe-Pillared Clay Catalysts. in Chinese Journal of Catalysis
Science Press, Beijing., 30(1), 14-18.
https://doi.org/10.1016/S1872-2067(08)60086-8

Banković P, Milutinović Nikolić A, Mojović Z, Rosić A, Čupić Ž, Lončarević D, Jovanović DM. Toluene Degradation in Water Using AlFe-Pillared Clay Catalysts. in Chinese Journal of Catalysis. 2009;30(1):14-18.
doi:10.1016/S1872-2067(08)60086-8 .

Banković, Predrag, Milutinović Nikolić, Aleksandra, Mojović, Zorica, Rosić, Aleksandra, Čupić, Željko, Lončarević, Davor, Jovanović, Dušan M., "Toluene Degradation in Water Using AlFe-Pillared Clay Catalysts" in Chinese Journal of Catalysis, 30, no. 1 (2009):14-18,
https://doi.org/10.1016/S1872-2067(08)60086-8 . .

TY  - JOUR
AU  - Novaković, Tatjana
AU  - Rožić, Ljiljana
AU  - Petrović, Srđan
AU  - Rosić, Aleksandra
PY  - 2008
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/402
AB  - Statistically designed experiments were done to study the recovery of Mg content from natural smectite clays from Serbia by hydrochloric acid leaching. The effects of relevant factors, such as temperature, leaching time, acid normality, solid-to-liquid ratio and stirring rate on leaching yield of MgO have been investigated. Experiments have been planned by the factorial design method. To test the significance of the effects, an analysis of variance has been conducted at 95% confidence intervals. The structural and adsorption properties of the starting smectite clay and the sample activated at chosen conditions were investigated by means of a model. Scanning electron microscopy (SEM) and nitrogen adsorption-desorption were used to analyze the morphological characteristic of the starting and the activated sample. The results from the nitrogen adsorption-desorption isotherms show that the activated smectite clay possess a narrow pore size distribution of about 2 nm, and a large specific surface area of 238 m(2)/g. The results of X-ray diffraction (XRD) and infrared analysis (IR) of starting and activated samples confirmed that smectite was the dominant mineral phase. Besides, chemical treatment of smectite clay with HCl produces an adsorbent with optimal porosity and other adsorption properties suitable for many industrial processes.
PB  - Elsevier Science Sa, Lausanne
T2  - Chemical Engineering Journal
T1  - Synthesis and characterization of acid-activated Serbian smectite clays obtained by statistically designed experiments
VL  - 137
IS  - 2
SP  - 436
EP  - 442
DO  - 10.1016/j.cej.2007.06.003
ER  - 

@article{
author = "Novaković, Tatjana and Rožić, Ljiljana and Petrović, Srđan and Rosić, Aleksandra",
year = "2008",
abstract = "Statistically designed experiments were done to study the recovery of Mg content from natural smectite clays from Serbia by hydrochloric acid leaching. The effects of relevant factors, such as temperature, leaching time, acid normality, solid-to-liquid ratio and stirring rate on leaching yield of MgO have been investigated. Experiments have been planned by the factorial design method. To test the significance of the effects, an analysis of variance has been conducted at 95% confidence intervals. The structural and adsorption properties of the starting smectite clay and the sample activated at chosen conditions were investigated by means of a model. Scanning electron microscopy (SEM) and nitrogen adsorption-desorption were used to analyze the morphological characteristic of the starting and the activated sample. The results from the nitrogen adsorption-desorption isotherms show that the activated smectite clay possess a narrow pore size distribution of about 2 nm, and a large specific surface area of 238 m(2)/g. The results of X-ray diffraction (XRD) and infrared analysis (IR) of starting and activated samples confirmed that smectite was the dominant mineral phase. Besides, chemical treatment of smectite clay with HCl produces an adsorbent with optimal porosity and other adsorption properties suitable for many industrial processes.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Chemical Engineering Journal",
title = "Synthesis and characterization of acid-activated Serbian smectite clays obtained by statistically designed experiments",
volume = "137",
number = "2",
pages = "436-442",
doi = "10.1016/j.cej.2007.06.003"
}

Novaković, T., Rožić, L., Petrović, S.,& Rosić, A.. (2008). Synthesis and characterization of acid-activated Serbian smectite clays obtained by statistically designed experiments. in Chemical Engineering Journal
Elsevier Science Sa, Lausanne., 137(2), 436-442.
https://doi.org/10.1016/j.cej.2007.06.003

Novaković T, Rožić L, Petrović S, Rosić A. Synthesis and characterization of acid-activated Serbian smectite clays obtained by statistically designed experiments. in Chemical Engineering Journal. 2008;137(2):436-442.
doi:10.1016/j.cej.2007.06.003 .

Novaković, Tatjana, Rožić, Ljiljana, Petrović, Srđan, Rosić, Aleksandra, "Synthesis and characterization of acid-activated Serbian smectite clays obtained by statistically designed experiments" in Chemical Engineering Journal, 137, no. 2 (2008):436-442,
https://doi.org/10.1016/j.cej.2007.06.003 . .

TY  - JOUR
AU  - Vuković, Zorica
AU  - Milutinović Nikolić, Aleksandra
AU  - Rožić, Ljiljana
AU  - Rosić, Aleksandra
AU  - Nedić, Zoran
AU  - Jovanović, Dušan M.
PY  - 2006
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3408
AB  - Bentonite from the 'Bogovina' coal mine in Serbia, was characterized. The influence of acid treatment on its composition, as well as mathematical descriptions of this influence are reported. The purpose of this work was to correlate the concentration of the acid used for the treatment with the resulting bentonite composition. X-ray diffraction (XRD), infrared spectroscopy and quantitative chemical analysis were employed to define the changes caused by acid treatment. The contents of all the cations, except Si, decreased exponentially with increasing concentration of the HCl used for the treatment of the bentonite. This approach was tested on previously published data and was shown to be valid. The basal reflections of smectite decreased gradually and eventually disappeared after intense treatment, while the other reflections remained in the XRD patterns of all the samples, but decreased slightly with increasing acid strength. In addition, the amount of X-ray amorphous matter formed increased rapidly with increasing acid concentration up to 4.5 M. With further increase in the acid strength, the amount of X-ray amorphous matter remained virtually constant
PB  - USA : The Clay Minerals Society
T2  - Clays and Clay Minerals
T1  - The influence of acid treatment on the composition of bentonite
VL  - 54
IS  - 6
SP  - 697
EP  - 702
DO  - 10.1346/CCMN.2006.0540605
ER  - 

@article{
author = "Vuković, Zorica and Milutinović Nikolić, Aleksandra and Rožić, Ljiljana and Rosić, Aleksandra and Nedić, Zoran and Jovanović, Dušan M.",
year = "2006",
abstract = "Bentonite from the 'Bogovina' coal mine in Serbia, was characterized. The influence of acid treatment on its composition, as well as mathematical descriptions of this influence are reported. The purpose of this work was to correlate the concentration of the acid used for the treatment with the resulting bentonite composition. X-ray diffraction (XRD), infrared spectroscopy and quantitative chemical analysis were employed to define the changes caused by acid treatment. The contents of all the cations, except Si, decreased exponentially with increasing concentration of the HCl used for the treatment of the bentonite. This approach was tested on previously published data and was shown to be valid. The basal reflections of smectite decreased gradually and eventually disappeared after intense treatment, while the other reflections remained in the XRD patterns of all the samples, but decreased slightly with increasing acid strength. In addition, the amount of X-ray amorphous matter formed increased rapidly with increasing acid concentration up to 4.5 M. With further increase in the acid strength, the amount of X-ray amorphous matter remained virtually constant",
publisher = "USA : The Clay Minerals Society",
journal = "Clays and Clay Minerals",
title = "The influence of acid treatment on the composition of bentonite",
volume = "54",
number = "6",
pages = "697-702",
doi = "10.1346/CCMN.2006.0540605"
}

Vuković, Z., Milutinović Nikolić, A., Rožić, L., Rosić, A., Nedić, Z.,& Jovanović, D. M.. (2006). The influence of acid treatment on the composition of bentonite. in Clays and Clay Minerals
USA : The Clay Minerals Society., 54(6), 697-702.
https://doi.org/10.1346/CCMN.2006.0540605

Vuković Z, Milutinović Nikolić A, Rožić L, Rosić A, Nedić Z, Jovanović DM. The influence of acid treatment on the composition of bentonite. in Clays and Clay Minerals. 2006;54(6):697-702.
doi:10.1346/CCMN.2006.0540605 .

Vuković, Zorica, Milutinović Nikolić, Aleksandra, Rožić, Ljiljana, Rosić, Aleksandra, Nedić, Zoran, Jovanović, Dušan M., "The influence of acid treatment on the composition of bentonite" in Clays and Clay Minerals, 54, no. 6 (2006):697-702,
https://doi.org/10.1346/CCMN.2006.0540605 . .