Abstract
We studied Cr isotopic fractionation during Cr(VI) reduction by Pseudomonas stutzeri strain RCH2. Despite the fact that strain RCH2 reduces Cr(VI) cometabolically under both aerobic and denitrifying conditions and at similar specific rates, fractionation was markedly different under these two conditions (ε was ∼2‰ aerobically and ∼0.4‰ under denitrifying conditions).
Publication types
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Evaluation Study
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Research Support, U.S. Gov't, Non-P.H.S.
MeSH terms
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Aerobiosis
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Biodegradation, Environmental
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Chemical Fractionation / methods*
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Chromium / chemistry
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Chromium / metabolism*
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Chromium Isotopes / analysis
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Denitrification
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Nitrites / metabolism*
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Oxidation-Reduction
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Oxygen / metabolism*
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Pseudomonas stutzeri / growth & development
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Pseudomonas stutzeri / isolation & purification
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Pseudomonas stutzeri / metabolism*
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Water Microbiology*
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Water Pollutants, Chemical / chemistry
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Water Pollutants, Chemical / metabolism
Substances
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Chromium Isotopes
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Nitrites
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Water Pollutants, Chemical
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Chromium
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Oxygen