Cadmium removal from aqueous solution by gene-modified Escherichia coli JM109

被引：48
作者：
Deng, X. [1 ]
Yi, X. E.
Liu, G.
机构：
[1] Shenzhen Univ, Coll Life Sci, Shenzhen 518060, Peoples R China
[2] Fujian Normal Univ, Coll Chem & Mat, Fuzhou 350007, Peoples R China
来源：
JOURNAL OF HAZARDOUS MATERIALS | 2007年 / 139卷 / 02期
关键词：
cadmium; genetically engineered Escherichia coli; bioaccumulation; heavy metal wastewater;
D O I：
10.1016/j.jhazmat.2006.06.043
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The article extended the study on the bioaccumulation of cadmium by genetically engineered bacterium Escherichia coli (namely M4) simultaneously expressing a cadmium transport system and metallothionein (NIT). The growth of M4 showed resistance to the presence of cadmium. Compared with Cd2+ uptake capacity by original host bacterial cells, The Cd2+ accumulation of M4 was enhanced more than one-fold. M4 could effectively bind Cd2+ over a range of pH from 4 to 8. The presence of Ni2+ and Mn2+ did not influence Cd2+ uptake remarkably, but Cu2+, Pb2+ and Zn2+ posed serious adverse effects. EDTA could drastically decrease Cd2+ bioaccumulation by M4, whereas the effect of citrate was relatively slight. (c) 2006 Published by Elsevier B.V.
引用
收藏
页码：340 / 344
页数：5
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