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USGS Scientist Collecting a Groundwater Sample at the Cape Cod Site

Detailed Description

U.S. Geological Survey (USGS) scientist collecting groundwater samples from a Cape Cod test site to study iron(II) oxidation by added nitrate. The addition of nitrate in a low oxygen groundwater resulted in the immobilization of naturally occurring dissolved arsenic and the conversion of nitrate to innocuous nitrogen gas.


Public Domain.