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
收藏
页码：104 / 108
页数：5
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