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Bioaccumulation of nickel from aqueous solutions by genetically engineered Escherichia coli

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Bioaccumulation of nickel from aqueous solutions by genetically engineered Escherichia coli.htm (413bytes)
Date
2003-03-15
Author
Deng, X
Li, QB
李清彪
Lu, YH
卢英华
Sun, DH
Huang, YL
Chen, XR
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  • 化学化工-已发表论文 [14469]
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Abstract
This study constructed a genetically engineered Escherichia coli JM109 which simultaneously expressed nickel transport system and metallothionein to remove and recover Ni2+ from aqueous solution. Bioaccumulation process was rapid and followed linearized Langmuir isotherm. A more than six-fold increase of Ni2+ binding capacity was obtained by genetically engineered E coli cells compared with original host E coli cells. A pH assay showed genetically engineered E coli cells accumulated Ni2+ effectively over a broad range of pH (4-10). The presence of 1000 mg/L Na+ and Ca2+, or 50 mg/L Cd2+ or Pb2+ did not have a significant effect on Ni2+ bioaccumulation, while Mg2+, Hg2+ and Cu2+ posed a severe adverse influence on Ni2+ uptake by genetically engineered E coli. Furthermore, genetically engineered E coli cells did not require extra nutrients for Ni2+ bioaccumulation. (C) 2003 Elsevier Science Ltd. All rights reserved.
Citation
WATER RESEARCH,2003,37(10):2505-2511
URI
http://dx.doi.org/10.1016/S0043-1354(03)00027-7
https://dspace.xmu.edu.cn/handle/2288/12170

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