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Bacterial sulfate reduction limits natural arsenic contamination in groundwater

Matthew F. Kirk, Thomas R. Holm, Jungho Park, Qusheng Jin, Robert A. Sanford, Bruce W. Fouke and Craig M. Bethke
Bacterial sulfate reduction limits natural arsenic contamination in groundwater
Geology (Boulder) (November 2004) 32 (11): 953-956

Abstract

Natural arsenic contamination of groundwater, increasingly recognized as a threat to human health worldwide, is characterized by arsenic concentrations that vary sharply over short distances. Variation in arsenic levels in the Mahomet aquifer system, a regional glacial aquifer in central Illinois, appears to arise from variable rates of bacterial sulfate reduction in the subsurface, not differences in arsenic supply. Where sulfate-reducing bacteria are active, the sulfide produced reacts to precipitate arsenic, or coprecipitate it with iron, leaving little in solution. In the absence of sulfate reduction, methanogenesis is the dominant type of microbial metabolism, and arsenic accumulates to high levels.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 32
Serial Issue: 11
Title: Bacterial sulfate reduction limits natural arsenic contamination in groundwater
Affiliation: University of Illinois, Department of Geology, Urbana, IL, United States
Pages: 953-956
Published: 200411
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 30
Accession Number: 2004-084076
Categories: Environmental geology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: With GSA Data Repository Item 2004156
Illustration Description: illus.
N37°00'00" - N42°30'00", W91°30'00" - W87°30'00"
Secondary Affiliation: Illinois State Water Survey, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 200424
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