Dahe Fan
School of Chemical and Biological Engineering, Yancheng Institute of Technology, Yancheng 224003, China
Xuemei Zhu
School of Chemical and Biological Engineering, Yancheng Institute of Technology, Yancheng 224003, China
Maorong Xu
School of Chemical and Biological Engineering, Yancheng Institute of Technology, Yancheng 224003, China
Jinlong Yan
School of Chemical and Biological Engineering, Yancheng Institute of Technology, Yancheng 224003, China
ABSTRACT
The adsorption of chromium (VI) by Chitosan Coated Montmorillonite (CCM) from aqueous solution was studied. To evaluate the adsorption capacity, the effects of pH, initial concentration and temperature on the adsorption were investigated. The isothermal data was applied to Langmuir linear and the Freundlich linear isotherm equation and the thermodynamic parameters (ΔH, ΔG, ΔS) were calculated according to the values of binding Langmuir constant, KL. Results indicated that the adsorption between CCM and chromium (VI) was significantly physical, the negative ΔH constant at lower temperature confirmed that the more chromium (VI) was adsorbed by chitosan coated montmorillonite at lower temperature. The kinetics of the sorption process of chromium (VI) on chitosan coated montmorillonite were investigated using the pseudo-first order and pseudo-second order kinetics, results showed that the pseudo-second order equation model provided the best correlation with the experimental results.
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How to cite this article
Dahe Fan, Xuemei Zhu, Maorong Xu and Jinlong Yan, 2006. Adsorption Properties of Chromium (VI) by Chitosan Coated Montmorillonite. Journal of Biological Sciences, 6: 941-945.
DOI: 10.3923/jbs.2006.941.945
URL: https://scialert.net/abstract/?doi=jbs.2006.941.945
DOI: 10.3923/jbs.2006.941.945
URL: https://scialert.net/abstract/?doi=jbs.2006.941.945
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