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Applied and Environmental Microbiology, December 2004, p. 7558-7560, Vol. 70, No. 12
0099-2240/04/$08.00+0     DOI: 10.1128/AEM.70.12.7558-7560.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.

SHORT REPORT

Resistance of Solid-Phase U(VI) to Microbial Reduction during In Situ Bioremediation of Uranium-Contaminated Groundwater

Irene Ortiz-Bernad,* Robert T. Anderson, Helen A. Vrionis, and Derek R. Lovley

Department of Microbiology, University of Massachusetts, Amherst, Massachusetts

Received 21 June 2004/ Accepted 28 July 2004

ABSTRACT

Speciation of solid-phase uranium in uranium-contaminated subsurface sediments undergoing uranium bioremediation demonstrated that although microbial reduction of soluble U(VI) readily immobilized uranium as U(IV), a substantial portion of the U(VI) in the aquifer was strongly associated with the sediments and was not microbially reducible. These results have important implications for in situ uranium bioremediation strategies.

* Corresponding author. Mailing address: University of Massachusetts, Dept. of Microbiology, Morrill Science Center IVN, Amherst, MA 01003. Phone: (413) 577-0217. Fax: (413) 545-1578. E-mail: iortiz{at}microbio.umass.edu.

Applied and Environmental Microbiology, December 2004, p. 7558-7560, Vol. 70, No. 12
0099-2240/04/$08.00+0     DOI: 10.1128/AEM.70.12.7558-7560.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.



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