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USGS · 70023895

Arsenic species and chemistry in groundwater of southeast Michigan

M.-J. Kim·J. Nriagu·S. Haack
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Abstract

Groundwater samples, taken from 73 wells in 10 counties of southeast Michigan in 1997 had arsenic concentrations in the range of 0.5 to 278 μg/l, the average being 29 μg/l. About 12% of these wells had arsenic concentrations that exceeded the current USEPA's maximum contaminant level of 50 μg/l. Most (53-98%) of the arsenic detected was arsenite [As(III)] and other observations supported the arsenic species distribution (low redox potential and DO). In shallow groundwater (15 m), the concentration of arsenic is possibly controlled by reductive dissolution of arsenic-rich iron hydroxide/oxyhydroxide and dissolution of arsenic sulfide minerals.

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M.-J. Kim, J. Nriagu, S. Haack. 2002. Arsenic species and chemistry in groundwater of southeast Michigan. https://doi.org/10.1016/s0269-7491(02)00114-8

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