Removal of zinc, copper and lead by natural zeolite - a comparison of adsorption isotherms

被引：479

作者：

Peric, J ^{[1
]}

Trgo, M ^{[1
]}

Medvidovic, NV ^{[1
]}

机构：

[1] Univ Split, Fac Chem Technol, Split 21000, Croatia

来源：

WATER RESEARCH | 2004年 / 38卷 / 07期

关键词：

zinc; copper; lead; natural zeolite; adsorption models;

D O I：

10.1016/j.watres.2003.12.035

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

An uptake of zinc (Zn), copper (Cu), and lead (Pb) from aqueous solutions by ion exchange on natural zeolitic tuff has been studied. The Croatian zeolite clinoptilolite from the Donje Jesenje deposit has been used as a natural ion exchanger. The efficiency of removal is higher for Pb and Cu than for Zn ions. Measured concentrations of Si in the liquid phase identify the detachment of the aluminosilicate structure during ion exchange in the presence of H+ and OH- ions. The adsorption isotherm equations; Langmuir-Freundlich, Redlich-Petersen, Toth, Dubinin-Radushkevich, modified Dubinin-Radushkevich, and Lineweawer-Burk were derived from the basic empirical equations, and used for calculation of ion exchange parameters. The best fitting of experimental results to the proposed isotherms was observed in models that assume that ionic species bind first at energetically most favorable sites, with multi-layer adsorption taking place subsequently. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：1893 / 1899

页数：7

共 20 条

[1] Use of general purpose adsorption isotherms for heavy metal clay mineral interactions [J].