文章基本信息

标题：Cytosolic Reduction of Toxic Cr (VI) by Indigenous Microorganism
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作者：Shaiza Iftikhar ; Muhammad Faisal ; Shahida Hasnain 等
期刊名称：Research Journal of Environmental Sciences
印刷版ISSN：1819-3412
电子版ISSN：2152-8238
出版年度：2007
卷号：1
期号：2
页码：77-81
DOI：10.3923/rjes.2007.77.81
出版社：Academic Journals Inc., USA
摘要：In the present study chromium resistant bacterial strain Bacillus cereus S-6 isolated from effluents of tannery was used for the reduction of toxic Cr (VI) into less toxic Cr (III). It could resist very high concentration of K₂CrO₄ i.e., up to 40 mg mL^-1 on nutrient agar, 25 mg mL^-1 in nutrient broth and up to 1.5 mg mL^-1of K₂CrO₄ in acetate-minimal medium. At an initial Cr (VI) concentration of 100 μg mL^-1, the cytosol and membrane preparation of the strain were able to reduced almost 67 and 43% of Cr (VI) within 24 h incubation period while the heat killed cytosol and membrane preparation reduced 24 and 18% within the same time period. At high initial K₂CrO₄concentration (500 μg mL^-1), the reduction percentage decreased and cytosol reduce 36% and membrane preparation 18% of the total chromium supplied after 24 h. After heat shock these reduction values were 13 and 9%, respectively.