Adsorption of benzoic acid by CTAB exchanged montmorillonite |
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| Authors: | Liang-Guo Yan Jin Wang Hai-Qin Yu Qin Wei Bin Du Xiao-Quan Shan |
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| Affiliation: | aState Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;bSchool of Chemistry and Chemical Engineering, Jinan University, Jinan 250022, China |
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| Abstract: | 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. |
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| Keywords: | Organo-montmorillonite Adsorption Benzoic acid Adsorption kinetics |
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