Gold sorption on chitosan derivatives

被引：140

作者：

Arrascue, ML

Garcia, HM

Horna, O

Guibal, E

机构：

[1] Ecole Mines Ales, Lab Genie Environm Ind, F-30319 Ales, France

[2] Univ Peruana Cayetano Heredia, Dept Acad Quim, Lima 31, Peru

来源：

HYDROMETALLURGY | 2003年 / 71卷 / 1-2期

关键词：

gold; chitosan; sulfur derivatives; sorption; isotherms;

D O I：

10.1016/S0304-386X(03)00156-7

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Four derivatives of chitosan have been prepared by cross-linking and by grafting of sulfur compounds. Sorption isotherms were performed at different pHs in order to optimize the pH conditions at fixed chloride concentration. Sorption isotherms were correlated with gold speciation in solution. Sulfur grafting decreases the influence of the pH on sorption isotherms. Introducing sulfur chelating moieties gives a dual structure to the polymer: chelating and ion exchange capability. Sorption kinetics was influenced by the sorbent dosage and the type of sorbent used. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：191 / 200

页数：10

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