Adsorption of benzoic acid by CTAB exchanged montmorillonite

This paper reports the adsorption of benzoic acid from water on cetyl trimethylammonium exchanged montmorillonite (CTAB-montmorillonite). Important factors are the adsorbent concentration, ionic strength, equilibrium time and pH. The largest adsorption is at pH 9. The adsorption kinetics data fitted...

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Bibliographic Details
Published in:Applied clay science 2007-09, Vol.37 (3-4), p.226-230
Main Authors: Yan, Liang-Guo, Wang, Jin, Yu, Hai-Qin, Wei, Qin, Du, Bin, Shan, Xiao-Quan
Format: Article
Language:English
Subjects:
Adsorption
Adsorption kinetics
Benzoic acid
Earth sciences
Earth, ocean, space
Exact sciences and technology
Mineralogy
Organo-montmorillonite
Silicates
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Summary:This paper reports the adsorption of benzoic acid from water on cetyl trimethylammonium exchanged montmorillonite (CTAB-montmorillonite). Important factors are the adsorbent concentration, ionic strength, equilibrium time and pH. The largest adsorption is at pH 9. The adsorption kinetics data fitted the pseudo-second-order equation. The adsorption isotherms at different pH were linear indicating a partition mechanism. Up to about 61% of the dissolved benzoic acid was adsorbed by CTAB-montmorillonite. These results indicate that CTAB-montmorillonite is a potential adsorbent for benzoic acid.
ISSN:0169-1317
1872-9053
DOI:10.1016/j.clay.2006.12.014