Adsorption of Cu2+, Zn2+ and Cd2+ on Bacillus subtilis

被引：1

作者：

刘丽艳 ^{[1
]}

李鑫钢 ^{[1
]}

唐国武 ^{[2
]}

孙津生 ^{[1
]}

机构：

[1] National Engineering Research Center for Distillation Technology School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China 2. College of Chemistry Chemical Engineering and

来源：

Transactions of Tianjin University | 2006年 / 02期

基金：

中国国家自然科学基金;

关键词：

biosorption; Bacillus subtilis; heavy metal; kinetics; isotherms;

D O I：

暂无

中图分类号：

TF18 [微生物冶金];

学科分类号：

080601 ;

摘要：

A process of biosorption of Cu2+ , Zn2+ and Cd2+ on Bacillus subtilis was investigated. The experiments show that the process of biosorption is quite fast. The maximum adsorption was reached after 5 min and hardly changed with time. The experimental data was analyzed using four sorption kinetic models: the pseudo-first-order, the Ritchie second-order, the modified second-order and the Elovich equations, which helped to determine the best-fit equation for the sorption of metal ions onto biomass. The results show that both the Ritchie second-order and modified second-order equations can fit the experimental data. The Langmuir model is able to accurately describe adsorption of Cu2+ and Zn2+ on B. subtilis. The experimental data points of adsorption Cd2+ and Zn2+ on B. subtilis are described by Freundlich isotherms model.

引用

页码：104 / 108

页数：5

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