Use of rice straw as biosorbent for removal of Cu(II), Zn(II), Cd(II) and Hg(II) ions in industrial effluents

被引：232

作者：

Rocha, Crystian Goncalves ^{[1
]}

Morozin Zaia, Dimas Augusto ^{[1
]}

da Silva Alfaya, Reni Ventura ^{[1
]}

da Silva Alfaya, Antonio Alberto ^{[1
]}

机构：

[1] Univ Estadual Londrina, UEL, Dept Quim, BR-86051990 Londrina, PR, Brazil

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2009年 / 166卷 / 01期

关键词：

Rice straw; Biosorbent; Adsorption; Heavy metals; Toxic metals; AQUEOUS-SOLUTIONS; HEAVY-METALS; ADSORPTION; COPPER(II); HUSK; KINETICS; CADMIUM; SILICA; NICKEL; CARBON;

D O I：

10.1016/j.jhazmat.2008.11.074

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Adsorption experiments were carried out using waste rice straw of several kinds as a biosorbent to adsorb Cu(II), Zn(II), Cd(II) and Hg(II) ions from aqueous solutions at room temperature. To achieve the best adsorption conditions the influence of pH and contact time were investigated. The isotherms of adsorption were fitted to the Freundlich equation. Based on the experimental data and Freundlich model, the adsorption order was Cd(II) > Cu(II) > Zn(II) > Hg(H) on the rice straw. This quick adsorption process reached the equilibrium before 1.5 h, with maximum adsorptions at pH 5.0. Thermodynamic aspects of the adsorption process were investigated. The biosorbent material was used in columns for the removal of ions Cu, Zn, Cd and Hg of real samples of industrial effluent and its efficiency was studied. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：383 / 388

页数：6

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