期刊
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
卷 81, 期 1, 页码 25-29出版社
SPRINGER
DOI: 10.1007/s00128-008-9442-5
关键词
Cr6+ reducing bacterium; bioremediation; Cr6+ reduction; Bacillus sp.ev3
This study was aimed at assessing the ability of Bacillus sp.ev3 to reduce hexavalent chromium into its trivalent form. Bacillus sp.ev3 could tolerate Cr6+ (4800 mu g/mL), Pb2+ (800 mu g/mL), Cu2+ (200 mu g/mL), Cd2+ (50 mu g/mL), Zn2+ (400 mu g/mL), Ni2+ (4000 mu g/mL) and Hg2+ (50 mu g/mL). Bacillus sp.ev3 showed optimum growth at 37C and pH at 7. Bacillus sp.ev3 could reduce 91% of chromium from the medium after 96 h and was also capable to reduce 84% chromium from the industrial effluents after 144 h. Cell free extracts of Bacillus sp.ev3 grown in the presence of Cr showed reduction of 70%, 45.6% and 27.4% at concentrations of 10 mu g Cr6+/mL, 50 mu g Cr6+/mL and 100 mu g Cr6+/mL, respectively.
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