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Chromate Reduction by Chromium-Resistant Bacteria Isolated from Soils Contaminated with Dichromate

F. A. O. Camargo, F. M. Bento, B. C. Okeke and W. T. Frankenberger*

Department of Environmental Science, Univ. of California, Riverside, CA 92521



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  		Fig. 1. Tolerance of Cr(VI)-resistant bacteria cultured on Luria–Bertani agar supplemented with Cr(VI) at different pH values. Error bars represent standard deviation (n - 1). CFU, colony-forming units.

 


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  		Fig. 2. Growth of Cr(VI)-resistant bacterial isolates in a Luria–Bertani medium supplemented with different Cr(VI) concentrations. Error bars represent standard deviation (n - 1).

 


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  		Fig. 3. Effect of pH on the (a) growth and (b) Cr(VI) reduction of Cr-resistant bacterial isolates. Error bars represent standard deviation (n - 1).

 


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  		Fig. 4. Effect of temperature on the (a) growth and (b) Cr(VI) reduction of Cr-resistant bacterial isolates. Error bars represent standard deviation (n - 1).

 


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  		Fig. 5. Time course of Cr(VI) reduction (a) at 2.0 mg Cr(VI) L-1 by the Cr-resistant bacterial isolates and (b) at different Cr concentration by the isolate ES 29. Error bars represent standard deviation (n - 1).

 




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The SCI Journals Agronomy Journal Crop Science
Journal of Natural Resources
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