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Published: Kem. Ind. 63 (7-8) (2014) 253−258
Paper reference number: KUI-14/2013
Paper type: Original scientific paper
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Use of Chitosan-modified Bentonite for Removal of Cu2+, Cl− and 2,4-Dichlorophenoxyacetic Acid (2,4-D) from Aqueous Solution

K. Ba, L. He, H. Tang, J. Q. Gao, S. F. Zhu, Y. Li and W. N. Sun


Batch experiments were performed to investigate the removal of Cu2+, Cl−, and 2,4-dichlorophenoxyacetic acid (2,4-D) from aqueous solution using chitosan-modified bentonite. When the chitosan was loaded on the bentonite, the inter-layer space of the montmorillonite increased and the adsorption efficiency enhanced, as chitosan contains large numbers of −NH2 and −OH functional groups that could serve as coordination sites to bind heavy metals. In this study, the bentonite that was prepared through three procedures: Na2CO3 treatment, thermal treatment and compound treatment, was modified by chitosan. Experimental results demonstrated that the average removal rates of Cu2+, Cl−, and 2,4-D effectively were 94.87 %, 86.19 % and 91.06 %, respectively.

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bentonite, chitosan, compound modification, adsorption efficiency