Equilibrium and kinetic modelling of chromium(III) sorption by animal bones

被引：53

作者：

Chojnacka, K ^{[1
]}

机构：

[1] Wroclaw Univ Technol, Inst Chem Engn & Heating Equipment, PL-50373 Wroclaw, Poland

来源：

CHEMOSPHERE | 2005年 / 59卷 / 03期

关键词：

sorption; animal bones; modelling; kinetics; equilibrium;

D O I：

10.1016/j.chemosphere.2004.10.052

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The paper discusses sorption of Cr(III) ions from aqueous solutions by animal bones. Animal bones were found to be an efficient sorbent with the maximum experimentally determined sorption capacity in the range 29-194mgg(-1) that depended on pH and temperature. The maximum experimentally determined sorption capacity was obtained at 50 degrees C, pH 5. Batch kinetics and equilibrium experiments were performed in order to investigate the influence of contact time, initial concentration of sorbate and sorbent, temperature and pH. It was found that sorption capacity increased with increase of Cr(III) concentration, temperature and initial pH of metal solution. Mathematical models describing kinetics and statics of sorption were proposed. It was found that process kinetics followed the pseudo-second-order pattern. The influence of sorbent concentration was described with Langmuir-type equation and the influence of sorhate concentration was described with empirical dependence. The models were positively verified. (c) 2004 Elsevier Ltd. All rights reserved.

引用

页码：315 / 320

页数：6

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