Removal of copper ions from aqueous solutions by kaolinite and batch design

被引:73
作者
Alkan, Mahir [1 ]
Kalay, Burcu [1 ]
Dogan, Mehmet [1 ]
Demirbas, Oezkan [1 ]
机构
[1] Balikesir Univ, Fac Sci & Literature, Dept Chem, TR-10145 Cagis Balikesir, Turkey
关键词
kaolinite; copper ion; adsorption;
D O I
10.1016/j.jhazmat.2007.09.047
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The removal of copper ions from aqueous solutions by kaolinite was investigated by using a batch-type method. Effects of factors such as pH, ionic strength, temperature, acid-activation and calcination on copper adsorption were investigated. The uptake of copper was determined from changes in concentration as measured by atomic absorption spectrometry. The extent of copper adsorption increased with increasing pH and temperature and with decreasing ionic strength, acid-activation and calcination temperature. The Langmuir and Freundlich adsorption models were used to determine the isotherm parameters associated with the adsorption process. The results provide support for the adsorption of copper ions onto kaolinite. Thermodynamic parameters indicated the endothermic nature of copper adsorption on kaolinite. The experimental results were applied a batch design. As a result, the kaolinite may be used for removal of copper ions from aqueous solutions. (c) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码:867 / 876
页数:10
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