Equilibrium studies for the sorption of lead from effluents using chitosan

被引:235
作者
Ng, JCY [1 ]
Cheung, WH [1 ]
McKay, G [1 ]
机构
[1] Hong Kong Univ Sci & Technol, Dept Chem Engn, Kowloon, Hong Kong, Peoples R China
关键词
chitosan; lead; adsorption;
D O I
10.1016/S0045-6535(03)00223-6
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The sorption of lead ions from aqueous solution onto chitosan has been studied. Equilibrium studies have been carried out to determine the capacity of chitosan for lead ions. The effects of solution pH and chitosan particle size on the sorption capacity have been studied. The experimental data were analyzed using three equilibrium isotherm correlations, namely, Langmuir, Freundlich and Redlich-Peterson equations. The linear correlation coefficients were determined for each isotherm and the, Freundlich provided the best fit. In addition, error functions have been used to determine the alternative single component equilibrium isotherm parameters by non-linear regression due to the inherent bias in using the correlation coefficient from the linearization. This technique enables the "best fit" isotherm parameters to be used in the equilibrium equations for the sorption of lead ions on chitosan within the limits and assumptions of the various error analysis methods. (C) 2003 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:1021 / 1030
页数:10
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