Copper and zinc removal from aqueous solution by mixed mineral systems - II. The role of solution composition and aging

被引：11

作者：

Egirani, DE ^{[1
]}

Baker, AR ^{[1
]}

Andrews, JE ^{[1
]}

机构：

[1] Univ E Anglia, Sch Environm Sci, Norwich NR4 7TJ, Norfolk, England

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2005年 / 291卷 / 02期

关键词：

copper; zinc; clay minerals; (hydr)oxides; sorption; mixed minerals; pH; ionic strength; solid concentration and aging;

D O I：

10.1016/j.jcis.2005.05.006

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This study investigates Cu and Zn removal onto binary mixed mineral sorbents from simulated wastewater, relevant to streams impacted by acid mine drainage and effluents. Mixed suspensions of kaolinite/montmorillonite and kaolinite/goethite exhibited different sorption behavior from the single mineral components, reducing Cu and Zn removal (except Cu sorbed on montmorillonite/goethite) over the range of pH investigated. Cu and Zn removal by the electrolyzed systems showed a complex response to increased ionic strength, which increased solid concentration, leading to lower Cu and Zn sorption. Enhanced Cu sorption on the montmorillonite/goethite as age increased may be attributed to increased hydroxylation of the mineral surface resulting in the formation of new reactive sites. (c) 2005 Elsevier Inc. All rights reserved.

引用

页码：326 / 333

页数：8

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