Kinetics of adsorption of Zn(II) ion on chitosan derivatives

被引：46

作者：

Ding, Ping ^{[1
]}

Huang, Ke-Long ^{[1
]}

Li, Gui-Yin ^{[1
]}

Liu, Yan-Fei ^{[1
]}

Zeng, Wen-Wen ^{[1
]}

机构：

[1] Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Peoples R China

来源：

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES | 2006年 / 39卷 / 4-5期

基金：

中国国家自然科学基金;

关键词：

chitosan derivatives; Zn(II) ion; adsorption kinetics;

D O I：

10.1016/j.ijbiomac.2006.03.029

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

The adsorption of Zn(II) ions from aqueous solution by chitosan derivatives (KCTS and HKCTS) was studied in a batch adsorption system. The adsorption capacities and rates of Zn(II) ions onto chitosan derivatives were evaluated. The adsorption isothermal data could be well interpreted by the Langmuir and Freundlich models. The kinetic experimental data properly correlated with the second-order kinetic model, which indicates that the chemical adsorption is the rate-limiting step. The apparent adsorption activation energy were 25.47 kJ mol(-) and 5.473 kJ mol(-), respectively, and the second-order adsorption constant for KCTS and HKCTS were 0.00311 g (mg min)(-1) and 0.005 g (mg min)(-1), respectively. (c) 2006 Published by Elsevier B.V.

引用

页码：222 / 227

页数：6

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