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CHROMATE-TOLERANT BACTERIA FOR ENHANCED METAL UPTAKE BY EICHHORNIA CRASSIPES (MART.)
- Article from:
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International Journal of Phytoremediation
- Article date:
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March 1, 2007
- Author:
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Copyright informationCopyright Taylor & Francis Ltd. 2007. Provided by ProQuest LLC. (Hide copyright information)
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A total of 85 chromate-resistant bacteria were isolated from the rhizosphere of water hyacinth grown in Mariout Lake, Egypt, as well as the sediment and water of this habitat. Only 4 (11%), 2 (8%), and 2 (8%) of isolates from each of the environments, respectively, were able to tolerate 200 mg Cr (VI) L^sup -1^. When these eight isolates were tested for their ability to tolerate other metals or to reduce chromate, they were shown to also be resistant to Zn, Mn, and Pb, and to display different degrees of chromate reduction (28% to 95%) under aerobic conditions. The isolates with the higher chromate reduction rates from 42% to 95%, (RA1, RA2, RA3, RA5, RA7, and RA8) were genetically diverse ...
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