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CHLORINATED SOLVENT CONTAMINATED SOILS AND GROUNDWATER: FIELD APPLICATION OF THE SOLVENT EXTRACTION RESIDUAL BIOTREATMENT TECHNOLOGY
Citation:
SEWELL, G., S. C. MRAVIK, A. L. WOOD, M. ANNABLE, R. SILLAN, AND K. WARNER. CHLORINATED SOLVENT CONTAMINATED SOILS AND GROUNDWATER: FIELD APPLICATION OF THE SOLVENT EXTRACTION RESIDUAL BIOTREATMENT TECHNOLOGY. ISBN: 9781566706568, Chapter 5, Jeffrey W. Talley (ed.), Bioremediation of Relcalcitrant Compounds. CRC Press - Taylor & Francis Group, LLC, Boca Raton, FL, , 59-146, (2006).
Impact/Purpose:
to publish information
Description:
A pilot scale demonstration of the Solvent Extraction Residual Biotreatment (SERB) technology was conducted at the former Sage's Dry Cleaner site in Jacksonville, FL. The SERB technology is a treatment train approach to complete site restoration, which combines an active in situ DNAPL removal technology, cosolvent extraction, with an enhanced in situ bioremediation technology, reductive dechlorination. An area of PCE (tetrachloroethylene) contamination was identified and flushed with approximately 2.5 pore volumes of ethanol during the in situ cosolvent extraction test, which removed approximately 60% of the estimated PCE mass. Approximately 2.72 kL of ethanol remained in the subsurface following the cosolvent extraction and provided electron donor in close proximity to the electron acceptor, PCE, to stimulate reductive dechlorination. Water samples from long-term ground water monitoring showed decreasing concentrations of PCE along with the formation of daughter products. In conjunction with the production of dissolved methane and hydrogen and the removal of sulfate, these measurements indicate that in situ biotransformation of PCE has been enhanced in areas exposed to the residual ethanol.
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CHLORINATED SOLVENT CONTAMINATED SOILS AND GROUNDWATER: FIELD APPLICATION OF THE SOLVENT EXTRACTION RESIDUAL BIOTREATMENT TECHNOLOGY