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ENHANCED REDUCTIVE DECHLORINATION OF PCE AND TCE IN A SOURCE ZONE VIA RECIRCULATION: PILOT TEST AND RESULTS
Waeyaert, P. | 15th International AquaConSoil Conference: Sustainable Use and Management of Soil, Sediment and Water Resources, 20-24 May, Antwerp, Belgium, 2019

A fully automated recirculation system was pilot tested over 1 yr to evaluate the applicability of enhanced reductive TCE and PCE dechlorination in a source zone at high concentrations and the effect of recirculation on hydrocarbon bioavailability in groundwater. Groundwater was extracted through central wells, amended with EnviC (a carbon source made in-house), and reinjected through 4 surrounding wells. The test was performed at two depth intervals. Results showed a full breakdown of PCE and TCE to ethene. Reductive dechlorination of PCE and TCE occurred quickly but DCE reduction to VC and ethane required a lag period of ~6 months. See pages 64-73 at https://www.aquaconsoil.org/assets/acs2019_proceedings_lores.pdf.



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