Quantification of in-situ trichloroethene dilution versus biodegradation using a novel chloride concentration technique

C. Walecka-Hutchison, J. L. Walworth

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

The objective of this study was to evaluate the effectiveness of in-situ trichloroethene (TCE) bioremediation, and to determine whether the observed decrease in TCE concentrations was attributable to biological degradation versus abiotic processes. An enhanced in-situ TCE bioremediation project in which groundwater amended with microbe stimulating compounds was injected into the contaminated subsurface was analyzed. Dilution, attributed to mixing between the injected clean and contaminated waters, was calculated using a modified groundwater mixing equation and chloride concentrations of the waters at various times in the study. Over the course of the trial, spatially averaged TCE concentrations within the aquifer decreased by 41%. The chloride calculations suggested that a 29% reduction may be attributable to dilution, and that only a 12% decrease in concentrations may be attributable to biological degradation.

Original languageEnglish (US)
Title of host publicationEnvironmental Chemistry
Subtitle of host publicationGreen Chemistry and Pollutants in Ecosystems
PublisherSpringer Berlin Heidelberg
Pages317-328
Number of pages12
ISBN (Print)3540228608, 9783540228608
DOIs
StatePublished - Dec 1 2005

Keywords

  • biodegradation
  • chloride
  • dilution
  • groundwater mixing
  • trichloroethene

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

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    Walecka-Hutchison, C., & Walworth, J. L. (2005). Quantification of in-situ trichloroethene dilution versus biodegradation using a novel chloride concentration technique. In Environmental Chemistry: Green Chemistry and Pollutants in Ecosystems (pp. 317-328). Springer Berlin Heidelberg. https://doi.org/10.1007/3-540-26531-7_30