| No measurable changes in 238U/235U due to desorption-adsorption of U(VI) from groundwater at the Rifle, Colorado IFRC site. | |
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MedLine Citation:
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PMID: 23379698 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Groundwater samples were collected from the Integrated Field Research Challenge field site in Rifle, CO over the course of a bicarbonate-induced U desorption-adsorption experiment. Uranium concentrations and high precision U isotopic compositions (238U/235U) of these groundwater samples were determined and used to assess the impact of bicarbonate-induced U(VI) desorption from contaminated sediments on the 238U/235U of groundwater. The 238U/235U of groundwater was not significantly impacted by bicarbonate-induced desorption of U(VI) from mineral surfaces, nor by adsorption of advecting U(VI) from upgradient locations onto those surfaces after the treatment. Assuming this absence of a significant shift in U isotopic composition associated with desorption-adsorption applies to other systems, reduction of U(VI) to U(IV) is expected to be the dominant source of U isotopic fractionation associated with removal of U(VI) from pore water as a result of natural and stimulated reductive pathways. Thus, changes in the 238U/235U composition of uranium-bearing fluids should be useful in quantifying the extent of reduction. |
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Authors:
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Alyssa E Shiel; Parker G Laubach; Thomas Martin Johnson; Craig C Lundstrom; Philip E Long; Kenneth Hurst Williams |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2013-2-5 |
Journal Detail:
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Title: Environmental science & technology Volume: - ISSN: 1520-5851 ISO Abbreviation: Environ. Sci. Technol. Publication Date: 2013 Feb |
Date Detail:
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Created Date: 2013-2-5 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0213155 Medline TA: Environ Sci Technol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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