Adsorption of Cu(II) ions from an aqueous solution by crosslinked amphoteric starch

被引:39
作者
Xu, SM [1 ]
Feng, S [1 ]
Yue, F [1 ]
Wang, JD [1 ]
机构
[1] Xinjing Univ, Coll Chem & Chem Engn, Urumqi 830046, Peoples R China
关键词
adsorption; modification; thermodynamics;
D O I
10.1002/app.13677
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
The adsorption process of Cu(II) ions from aqueous solutions by crosslinked amphoteric starch with quaternary ammonium and carboxymethyl groups was investigated. The adsorption capacity was found to be dependent on the solution pH, the dose of the crosslinked amphoteric starch, and the initial concentration of Cu(II) ions. Moreover, the adsorption capacity increased with an increasing degree of substitution (DS) of the carboxymethyl groups. The adsorption followed a Freundlich adsorption isotherm. The adsorption process was endothermic, and the thermodynamic parameters were calculated at different DS values. (C) 2004 Wiley Periodicals, Inc.
引用
收藏
页码:728 / 732
页数:5
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