In situ Bioreduction of Uranium ( VI ) to Submicromolar 1 Levels and Reoxidation by Dissolved Oxygen 2 Supporting Information
نویسندگان
چکیده
WEI-MIN WU, JACK CARLEY, JIAN LUO, MATTHEW A GINDER-VOGEL, ERICK 4 CARDENAS, MARY BETH LEIGH, CHAICHI HWANG, SHELLY D. KELLY, CHAUNGMIN 5 RUAN, LIYOU WU, JOY VAN NOSTRAND, TERRY GENTRY , KENNETH LOWE, TONIA 6 MEHLHORN, SUE CARROLL, WENSUI LOU, MATTHEW W. FIELDS, BAOHUA GU, 7 DAVID WATSON, KENNETH M. KEMNER, TERENCE MARSH, JAMES TIEDJE, JIZHONG 8 ZHOU, SCOTT FENDORF, PETER K. KITANIDIS, PHILIP M. JARDINE, AND CRAIG S. 9 CRIDDLE 10
منابع مشابه
In situ bioreduction of uranium (VI) to submicromolar levels and reoxidation by dissolved oxygen.
Groundwater within Area 3 of the U.S. Department of Energy (DOE) Environmental Remediation Sciences Program (ERSP) Field Research Center at Oak Ridge, TN (ORFRC) contains up to 135 microM uranium as U(VI). Through a series of experiments at a pilot scale test facility, we explored the lower limits of groundwater U(VI) that can be achieved by in-situ biostimulation and the effects of dissolved o...
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Bioreduction of mobile uranyl(VI) (UO2 ) to sparingly soluble uraninite (U(IV)O2(s)) is a strategy that has been proposed for in situ remediation of uranium contaminated aquifers. That strategy faces the challenge of reoxidation of uraninite, with consequent release of soluble uranyl when the stimulation of U(VI) bioreduction is terminated. We tested the effects of supplemental organic carbon (...
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Although humic substances occur ubiquitously in soil and groundwater, their effect on the biological reduction of uranium(VI) and subsequent reoxidation of U(IV) is poorly understood. This study investigated the role of humics in enhancing the bioreduction of U(VI) in laboratory kinetic studies, in field push-pull tests, and in the presence or absence of metal ions such as Ca2+ and Ni2+, which ...
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The dramatic decrease in solubility accompanying the reduction of U(VI) to U(IV), producing the insoluble mineral uraninite, has been viewed as a potential mechanism for sequestration of environmental uranium contamination. In the past 15 years, it has been firmly established that a variety of bacteria exhibit this reductive capacity. To obtain an understanding of the microbial metal metabolism...
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