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Applied and Environmental Microbiology, July 2008, p. 4580-4584, Vol. 74, No. 14
0099-2240/08/$08.00+0     doi:10.1128/AEM.00239-08
Copyright © 2008, American Society for Microbiology. All Rights Reserved.

Reduction of Uranium(VI) to Uranium(IV) by Clostridia{triangledown}

Weimin Gao and Arokiasamy J. Francis*

Environmental Sciences Department, Brookhaven National Laboratory, Upton, New York 11973

Received 27 January 2008/ Accepted 21 May 2008

Several different species of clostridia reduced U(VI) to U(IV) to various degrees. The optimal pH for U(VI) reduction is 5 to 6 in most cases; a Clostridium sp. showed the highest rate at pH 4. Nitrate did not affect U(VI) reduction, indicating that this process in clostridia is nitrate independent.

* Corresponding author. Mailing address: Brookhaven National Laboratory, Environmental Sciences Department, Building 490A, Upton, NY 11973. Phone: (631) 344-4534. Fax: (631) 344-7303. E-mail: francis1{at}bnl.gov

{triangledown} Published ahead of print on 30 May 2008.

Applied and Environmental Microbiology, July 2008, p. 4580-4584, Vol. 74, No. 14
0099-2240/08/$08.00+0     doi:10.1128/AEM.00239-08
Copyright © 2008, American Society for Microbiology. All Rights Reserved.





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