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 inc...reased 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
Keywords:
Acid treatment / Bentonite / Chemical analysis / IR / XRD
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 . .
