Biogeochemical treatment of engineered and natural attenuation of chlorinated solvents

Lonnie G. Kennedy, Jess Everett, Erica Becvar

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Biogeochemical Reductive Dechlorination (BiRD) is an alternative to bio-stimulation processes used for the treatment of chlorinated aliphatic hydrocarbons (CAH). BiRD is a new treatment concept for CAH which is in the field test phase. As part of the AFCEE Enhanced Bioremediation Initiative, a BiRD field test at Dover Air Force Base in Delaware was used to illustrate BiRD design, implementation, and results. The injection of SO4/2- and lactate resulted in the generation of significant quantities of FeS via biogeochemical processes. Prior to injection FeS concentrations were low (< 1.5 mg/kg). After injection, quantities of FeS formed < 174 mg/kg. The actual treatment zone was shallower than intended, but also covered a wider area. Based on the strong CAH treatment response, FeS evidently formed along the same pervasive pathways as contaminant flow. Treatment response was almost immediate in the two most upgradient (ESM1 and ESM2) and the most downgradient (ESM5) monitoring wells. All monitoring wells eventually showed significant treatment response for perchloroethylene, trichloroethylene, and dichloroethylene. Vinyl chloride, which was present prior to injection at concentrations between 10 and 87 μ/L, was neither treated nor generated during the field test. This is an abstract of a paper presented at the proceedings of the 8th International In Situ and On-Site Bioremediation Symposium (Baltimore, MD 6/6-9/2005).

Original languageEnglish (US)
Title of host publicationProceedings of the 8th International In Situ and On-Site Bioremediation Symposium
Pages1712-1719
Number of pages8
Volume4
Publication statusPublished - Dec 1 2005
Event8th International In Situ and On-Site Bioremediation Symposium - Baltimore, MD, United States
Duration: Jun 6 2005Jun 9 2005

Other

Other8th International In Situ and On-Site Bioremediation Symposium
CountryUnited States
CityBaltimore, MD
Period6/6/056/9/05

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All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Kennedy, L. G., Everett, J., & Becvar, E. (2005). Biogeochemical treatment of engineered and natural attenuation of chlorinated solvents. In Proceedings of the 8th International In Situ and On-Site Bioremediation Symposium (Vol. 4, pp. 1712-1719)