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Title: Anaerobic, Nitrate-Dependent Oxidation of U(IV) Oxide Minerals by the Chemolithoautotrophic Bacterium Thiobacillus denitrificans

Journal Article · · Applied and Environmental Microbiology

Under anaerobic conditions and at circumneutral pH, cells of the widely-distributed, obligate chemolithoautotrophic bacterium Thiobacillus denitrificans oxidatively dissolved synthetic and biogenic U(IV) oxides (uraninite) in nitrate-dependent fashion: U(IV) oxidation required the presence of nitrate and was strongly correlated to nitrate consumption. This is the first report of anaerobic U(IV) oxidation by an autotrophic bacterium.

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
US Department of Energy (US)
DOE Contract Number:
W-7405-ENG-48
OSTI ID:
15016181
Report Number(s):
UCRL-JRNL-204909; AEMIDF; TRN: US200511%%50
Journal Information:
Applied and Environmental Microbiology, Vol. 71, Issue 4; Other Information: Publication date is April 1, 2005; PDF-FILE: 19 ; SIZE: 0.2 MBYTES; PBD: 25 Jun 2004; ISSN 0099-2240
Country of Publication:
United States
Language:
English

References (14)

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Multiple influences of nitrate on uranium solubility during bioremediation of uranium-contaminated subsurface sediments journal September 2002
In - Situ Evidence for Uranium Immobilization and Remobilization journal April 2002
Influence of Mn oxides on the reduction of uranium(VI) by the metal-reducing bacterium Shewanella putrefaciens journal September 2002
Isolation and characterization of a novel toluene-degrading, sulfate-reducing bacterium. journal January 1996
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Direct detection of trace levels of uranium by laser-induced kinetic phosphorimetry journal July 1992

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Related Subjects

54 ENVIRONMENTAL SCIENCES
59 BASIC BIOLOGICAL SCIENCES
ANAEROBIC CONDITIONS
NITRATES
OXIDATION
OXIDE MINERALS
OXIDES