EFFECT OF PRE-REDUCTION OF AQUIFER MATERIAL ON PCE REDUCTIVE DECHLORINATION IN A CONTINUOUS-FLOW COLUMN STUDY

摘要

Tetrachloroethene (PCE) is a common contaminant in groundwater because of its extensive use in industrial and military degreasing applications. PCE reductive dechlorination leads to production of trichloroethene (TCE), cis-dichloroethene (c-DCE), vinyl chloride (VC) and ethene (ETH). Incomplete dechlorination may lead to the accumulation of c-DCE and VC, which is a known carcinogen (U.S. EPA, 1999). Engineering approaches to achieve complete dehalogenation of PCE to ethene involve electron donor addition and, frequently, bioaugmentation with a dechlorinating culture capable of complete transformation to ethene (Ellis, et al. 2002).