Adsorption characteristics of Cu<2+> and Cd<2+> on soil colloids and minerals as influenced by heavy metal-resistant bacterium enterobacter aerogenes
The potential of bacteria in the remediation of heavy metal-contaminated environments has received increasing attention over the past years. The adsorption kinetics and binding mechanisms of two metals on soil colloidal components as influenced by a heavy metal-resistant bacterium were investigated. Different impacts of bacteria on the adsorption kinetics of Cu<2+> and Cd<2+> by soil colloids were observed. The adsorption rate and accumulated adsorption quantity of Cd<2+> for the soil colloid composites were much greater than the pure soil colloid system. FTIR spectrum shows that the presence of bacterial cells increased the interaction between Cu<2+> and the free hydroxyl group on goethite surface. The reaction between Cd<2+> and the hydrate hydroxyl group on goethite surface was strengthensd in the presence of bacteria. Bacterial cells enhanced the interactions of hydroxyl group on kaolinite with Cu<2+> ions.
Soil colloid Mineral Bacteria Heavy metal
Peng Cai Qiaoyun Huang Zhaoyang Xie Wenli Chen
State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, C State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, C Key Laboratory of Subtropical Agricultural Resources and Environment, Ministry of Agriculture, Huazh
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
516-517
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）