Sulfate reduction in ground water of southeastern Montana

Water-Resources Investigations Report 80-9
Research supported by the U.S. Geological Survey, Department of the Interior, under grant 14-08-0001-G-497
By: , and 



Ground water in southeastern Montana was investigated to determine if sulfide production was bacterially mediated. Sulfate—reducing bacteria were detected in 25 of 26 ground—water samples in numbers ranging from 2.0 x 101 to greater than 2.4 x 104 bacteria per 100 milliliters. Stable sulfur isotope fractionation studies indicate a biological role in sulfate reduction. However, sulfate—reducing activity as determined by use of a radioactive sulfur isotope was observed in only 1 of 16 samples. Bacterial dissimilatory sulfate reduction is postulated to be responsible for a major part of the sulfide produced in these ground waters. These bacteria are most likely active in the adsorbed state, possibly in subsurface microzones where environmental conditions are conducive to sulfate reduction.

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Publication type Report
Publication Subtype USGS Numbered Series
Title Sulfate reduction in ground water of southeastern Montana
Series title Water-Resources Investigations Report
Series number 80-9
DOI 10.3133/wri809
Year Published 1980
Language English
Publisher U.S. Geological Survey
Description iii, 13 p.
Country United States
State Montana
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