Environmental engineers have proposed chemical reduction to detoxify wastes and contaminated waters, but its application does not appear to have the potential that chemical oxidation has. For example, they have proposed sodium sulfites to treat groundwater contaminated by sodium hypochlorite (Huibregts and Kastman 1979) and ferrous sulfate in conjunction with hydroxides to detoxify and insolubilize hexavalent chromium (Tolman et al. 1978; Metcalf and Eddy, Inc. 1972). Little work has been done in the use of chemical reduction for organic wastes.
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