自然科学版 英文版
自然科学版 英文版
自然科学版 英文版

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中南大学学报(英文版)

Journal of Central South University

Vol. 15    No. 2    April 2008

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Chemical composition and surface charge properties of montmorillonite
LIU Xiao-wen(刘晓文), HU Min(胡 敏), HU Yue-hua(胡岳华)

School of Resources Processing and Bioengineering, Central South University, Changsha 410083, China

Abstract: The effects of the cell parameter and chemical composition on the surface charge properties of five kinds of different colour montmorillonites were studied. The results indicate that the surface isoelectric point(IEP) of the montmorillonite shows positive correlation with the mass fractions of Fe2O3 and K2O, but it has little relation to the mass fractions of other chemical compositions. At around pH=6.8, the surface zeta potential of the montmorillonite shows the negative relationship with the mass fractions of Fe2O3 and MgO, but it does not linearly correlate to the mass fractions of other chemical compositions. Cell parameter(b0) of the montmorillonite expresses negative linear relationship with mass fractions of K2O and Na2O, so does c0sin β with mass fractions of SiO2 and Fe2O3. And there is no specific relationship between b0 and IEP of different montmorillonites, but there is positive correlation between c0sinβ and IEP of different montmorillonite samples.

 

Key words: surface charge property; zeta potential; cell parameter; montmorillonite

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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