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Processes affecting transport of uranium in a suboxic aquifer

Physics and Chemistry of the Earth

By:
, , , , , , and
DOI: 10.1016/j.pce.2006.04.005

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Abstract

At the Naturita site in Colorado, USA, groundwaters were sampled and analyzed for chemical composition and by culture and culture-independent microbiological techniques. In addition, sediments were extracted with a dilute sodium carbonate solution to determine quantities of labile uranium within the sediments. Samples from the upgradient portion of the contaminated aquifer, where very little dissolved Fe(II) is found in the groundwater, have uranium content that is controlled by U(VI) adsorption and few metal-reducing bacteria are observed. In the extreme downgradient portion of the aquifer, where dissolved Fe(II) is observed, uranium content of the sediments includes significant quantities of reduced U(IV) and diverse populations of Fe(III)-reducing bacteria were present in the subsurface with the potential of reducing U(VI) to U(IV). ?? 2006 Elsevier Ltd. All rights reserved.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Processes affecting transport of uranium in a suboxic aquifer
Series title:
Physics and Chemistry of the Earth
DOI:
10.1016/j.pce.2006.04.005
Volume
31
Issue:
10-14
Year Published:
2006
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Physics and Chemistry of the Earth
First page:
548
Last page:
555
Number of Pages:
8