Enhanced Reductive In Situ Precipitation of Technetium, Uranium, and Nitrate in Groundwater at the Savannah River Site

摘要

The U.S. Department of Energy (DOE) Savannah River Site (SRS) is a former nuclear weapons facility that is undergoing clean-up of groundwater and soil contamination. Alternatives to conventional pump-and-treat (which has limited effectiveness for closure of facilities with groundwater radionuclide impacts) are being evaluated through DOE’s Advanced Remediation Technologies (ART) program as part of the EM-22 Groundwater and Soil Remediation program. A pilot project is underway to evaluate in situ treatment of the radionuclides technetium and uranium, as well as nitrate and other constituents including strontium, cobalt, and nickel. The pilot involves the injection of organic carbon into the aquifer to stimulate biogeochemical processes to promote biological nitrate conversion, as well as the transformation of soluble metals and radio-