A comparative study for the sorption of Cu(II) ions by chitin and chitosan: Application of equilibrium and mass transfer models

被引：15

作者：

Sag, Y ^{[1
]}

Aktay, Y ^{[1
]}

机构：

[1] Univ Hacettepe, Dept Chem Engn, TR-06100 Ankara, Turkey

来源：

SEPARATION SCIENCE AND TECHNOLOGY | 2002年 / 37卷 / 12期

关键词：

waste-water treatment; Cu(II) ions; sorption; chitin; chitosan; equilibrium sorption models; mass transfer models;

D O I：

10.1081/SS-120005467

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The sorption of Cu(II) by chitin, a naturally occurring material, and chitosan, prepared from chitin, was investigated and compared. The effect of pH, initial metal ion concentration, particle size, sorbent concentration, and stirring rate on sorption capacity was characterized by measuring the sorption isotherms. Sorption data of chitin and chitosan were best modeled by the Langmuir and Redlich-Peterson isotherms, although they can be modeled by the Freundlich and BET sorption models. Next, batch studies were carried out to identify the rate-controlling steps for Cu(II) sorption. Single resistance models were used in the determination of the external film mass transfer step and the intraparticle diffusion step.

引用

页码：2801 / 2822

页数：22

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