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Halogenated solvent remediation

Patent ·
OSTI ID:1175003
Methods for enhancing bioremediation of ground water contaminated with nonaqueous halogenated solvents are disclosed. A preferred method includes adding a composition to the ground water wherein the composition is an electron donor for microbe-mediated reductive dehalogenation of the halogenated solvents and enhances mass transfer of the halogenated solvents from residual source areas into the aqueous phase of the ground water. Illustrative compositions effective in these methods include surfactants such as C.sub.2 -C.sub.4 carboxylic acids and hydroxy acids, salts thereof, esters of C.sub.2 -C.sub.4 carboxylic acids and hydroxy acids, and mixtures thereof. Especially preferred compositions for use in these methods include lactic acid, salts of lactic acid, such as sodium lactate, lactate esters, and mixtures thereof. The microbes are either indigenous to the ground water, or such microbes can be added to the ground water in addition to the composition.
Research Organization:
Idaho National Laboratory (INL), Idaho Falls, ID (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC07-99ID13727
Assignee:
Bechtel BWXT Idaho, LLC (Idaho Falls, ID)
Patent Number(s):
6,783,678
Application Number:
09/895,430
OSTI ID:
1175003
Country of Publication:
United States
Language:
English

References (11)

Transformations of 1- and 2-carbon halogenated aliphatic organic compounds under methanogenic conditions. journal January 1983
Cyclodextrin-Enhanced Solubilization of Organic Contaminants with Implications for Aquifer Remediation journal February 2000
Comparison of Butyric Acid, Ethanol, Lactic Acid, and Propionic Acid as Hydrogen Donors for the Reductive Dechlorination of Tetrachloroethene journal March 1997
A highly purified enrichment culture couples the reductive dechlorination of tetrachloroethene to growth. journal January 1993
Reductive dechlorination of high concentrations of tetrachloroethene to ethene by an anaerobic enrichment culture in the absence of methanogenesis. journal January 1991
Hydrogen as an electron donor for dechlorination of tetrachloroethene by an anaerobic mixed culture. journal January 1992
Biological reductive dechlorination of tetrachloroethylene and trichloroethylene to ethylene under methanogenic conditions. journal January 1989
Effect of Dechlorinating Bacteria on the Longevity and Composition of PCE-Containing Nonaqueous Phase Liquids under Equilibrium Dissolution Conditions journal March 2000
Biotransformation of tetrachloroethylene to trichloroethylene, dichloroethylene, vinyl chloride, and carbon dioxide under methanogenic conditions. journal January 1985
Modeling the Production of and Competition for Hydrogen in a Dechlorinating Culture journal August 1998
Isolation of a Bacterium That Reductively Dechlorinates Tetrachloroethene to Ethene journal June 1997

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54 ENVIRONMENTAL SCIENCES