Determining dechlorinating bioremedial potential in a fractured bedrock aquifer

Eun Kyeu Son, Donna E. Fennell, Kenneth Y. Lee

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Microcosms made up of groundwater and sediment fines from the bottom of a monitoring well were utilized to determine the potential for reductive dechlorination in a tetrachloroethylene (PCE)-contaminated fractured bedrock aquifer in Piscataway, NJ. The addition of lactate and butyrate stimulated rapid onset of tetrachloroethylene dechlorination to ethylene in microcosms. Little dechlorination was observed in live controls not receiving electron donor, suggesting that the aquifer might be electron donor limited. Abundant methane production was observed in the electron donor amended microcosms. Rates of tetrachloroethylene and vinyl chloride dechlorination were comparable, suggesting that vinyl chloride dechlorination to ethylene might not be rate-limiting for this microbial population. A robust dechlorinating population existed at this site and further characterization is on-going. Use of groundwater and well fines might be a cost effective approach for assessing biotransformation capabilities and populations in bedrock systems.

Original languageAmerican English
JournalACS Division of Environmental Chemistry, Preprints
Issue number2
StatePublished - 2003

ASJC Scopus subject areas

  • General Chemical Engineering

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