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Title: Mesoscale Biotransformation of Uranium: Influences of Organic Carbon Supply Rates and Sediment Oxides

Abstract

Remediation and long-term stewardship of uranium-contaminated sediments and groundwaters are critical problems at a number of DOE facilities and mining sites. Some remediation strategies based on in-situ bioreduction of U are potentially effective in significantly decreasing U concentrations in groundwaters. However, a number of basic processes require understanding in order to identify conditions more conducive to success of reduction-based U stabilization. Our current research targets several of these issues including: (1) effects of organic carbon (OC) forms and supply rates on stability of bioreduced U, (2) the roles of Fe(III)- and Mn(III,IV)-oxides as potential U oxidants in sediments, and (3) microbial community changes in relation to U redox changes. These issues were identified in our previous study on U bioreduction and reoxidation (Wan et al., 2005). Most of our studies are being conducted on historically U-contaminated sediments from Area 2 of the Field Research Center, Oak Ridge National Laboratory, in flow-through columns simulating in-situ field remediation.

Authors:
; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
926149
Report Number(s):
CONF/ERSP2007-1024940a
R&D Project: ERSD 1024940a; TRN: US0802450
Resource Type:
Conference
Resource Relation:
Conference: Annual Environmental Remediation Science Program (ERSP) Principal Investigator Meeting, April 16-19, 2007, Lansdowne, VA
Country of Publication:
United States
Language:
English
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; 54 ENVIRONMENTAL SCIENCES; BIOREMEDIATION; URANIUM; SEDIMENTS; GROUND WATER; ORGANIC COMPOUNDS; IRON OXIDES; MANGANESE OXIDES; OXIDIZERS; MICROORGANISMS; REDOX REACTIONS; ORNL; FIELD TESTS

Citation Formats

Tetsu Tokunaga, Jiamin Wan, Yongman Kim, Rebecca Daly, Eoin Brodie, Mary Firestone, Terry Hazen, Steve Sutton, Matt Newville, Tony Lanzirotti, and Bill Rao. Mesoscale Biotransformation of Uranium: Influences of Organic Carbon Supply Rates and Sediment Oxides. United States: N. p., 2007. Web.
Tetsu Tokunaga, Jiamin Wan, Yongman Kim, Rebecca Daly, Eoin Brodie, Mary Firestone, Terry Hazen, Steve Sutton, Matt Newville, Tony Lanzirotti, & Bill Rao. Mesoscale Biotransformation of Uranium: Influences of Organic Carbon Supply Rates and Sediment Oxides. United States.
Tetsu Tokunaga, Jiamin Wan, Yongman Kim, Rebecca Daly, Eoin Brodie, Mary Firestone, Terry Hazen, Steve Sutton, Matt Newville, Tony Lanzirotti, and Bill Rao. Thu . "Mesoscale Biotransformation of Uranium: Influences of Organic Carbon Supply Rates and Sediment Oxides". United States. doi:. https://www.osti.gov/servlets/purl/926149.
@article{osti_926149,
title = {Mesoscale Biotransformation of Uranium: Influences of Organic Carbon Supply Rates and Sediment Oxides},
author = {Tetsu Tokunaga and Jiamin Wan and Yongman Kim and Rebecca Daly and Eoin Brodie and Mary Firestone and Terry Hazen and Steve Sutton and Matt Newville and Tony Lanzirotti and Bill Rao},
abstractNote = {Remediation and long-term stewardship of uranium-contaminated sediments and groundwaters are critical problems at a number of DOE facilities and mining sites. Some remediation strategies based on in-situ bioreduction of U are potentially effective in significantly decreasing U concentrations in groundwaters. However, a number of basic processes require understanding in order to identify conditions more conducive to success of reduction-based U stabilization. Our current research targets several of these issues including: (1) effects of organic carbon (OC) forms and supply rates on stability of bioreduced U, (2) the roles of Fe(III)- and Mn(III,IV)-oxides as potential U oxidants in sediments, and (3) microbial community changes in relation to U redox changes. These issues were identified in our previous study on U bioreduction and reoxidation (Wan et al., 2005). Most of our studies are being conducted on historically U-contaminated sediments from Area 2 of the Field Research Center, Oak Ridge National Laboratory, in flow-through columns simulating in-situ field remediation.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Apr 19 00:00:00 EDT 2007},
month = {Thu Apr 19 00:00:00 EDT 2007}
}

Conference:
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