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  • Title: In situ reductive dechlorination of chlorinated ethenes in high nitrate groundwater.
    Author: Bennett P, Gandhi D, Warner S, Bussey J.
    Journal: J Hazard Mater; 2007 Nov 19; 149(3):568-73. PubMed ID: 17689011.
    Abstract:
    In situ bioremediation using carbohydrate was evaluated as an in situ treatment alternative for trichloroethene (TCE) and cis-1,2-dichloroethene (cDCE) in groundwater containing high nitrate concentrations. Upon addition of carbohydrate to groundwater, sequential reduction of electron acceptors was observed, where nitrate was reduced early in the pilot test, followed by sulfate and TCE. Reduction of cDCE to vinyl chloride and ethene occurred in conjunction with increased iron and manganese, and increased methane concentrations, approximately 7 months into the evaluation period, following depletion of nitrate and sulfate. TCE, cDCE, and vinyl chloride concentrations decreased from approximately 500 to >10 microg/L within 21 months of operation.
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