Original scientific paper
https://doi.org/10.15255/KUI.2013.014
Use of Chitosan-modified Bentonite for Removal of Cu2+, Cl− and 2,4-Dichlorophenoxyacetic Acid (2,4-D) from Aqueous Solution
K. Ba
; College of Chemistry and Molecular Engineering / Research Institute of Environmental Science, Zhengzhou University, Zhengzhou, PR China
L. L. He
; College of Chemistry and Molecular Engineering / Research Institute of Environmental Science, Zhengzhou University, Zhengzhou, PR China
H. Tang
; College of Chemistry and Molecular Engineering / Research Institute of Environmental Science, Zhengzhou University, Zhengzhou, PR China
J. Q. Gao
; College of Chemistry and Molecular Engineering / Research Institute of Environmental Science, Zhengzhou University, Zhengzhou, PR China
S. F. Zhu
; College of Chemistry and Molecular Engineering / Research Institute of Environmental Science, Zhengzhou University, Zhengzhou, PR China
Y. Li
; College of Mechanical Engineering, Zhengzhou University, Zhengzhou, PR China
W. N. Sun
; College of Mechanical Engineering, Zhengzhou University, Zhengzhou, PR China
Abstract
Batch experiments were performed to investigate the removal of Cu2+ , Cl- , and 2,4-dichlorophe- noxyacetic acid (2,4-D) from aqueous solution using chitosan-modified bentonite. When the chi-tosan 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.
Keywords
Bentonite; chitosan; compound modification; adsorption efficiency
Hrčak ID:
123792
URI
Publication date:
1.7.2014.
Visits: 2.190 *