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Halogenated solvent remediation

Patent ·
OSTI ID:986215
Methods for enhancing bioremediation of ground water contaminated with nonaqueous halogenated solvents are disclosed. An illustrative method includes adding an electron donor for microbe-mediated anaerobic reductive dehalogenation of the halogenated solvents, which electron donor enhances mass transfer of the halogenated solvents from residual source areas into the aqueous phase of the ground water. Illustrative electron donors include 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, of which lactic acid, salts of lactic acid--such as sodium lactate, lactate esters, and mixtures thereof are particularly illustrative. The microbes are either indigenous to the ground water, or such microbes can be added to the ground water in addition to the electron donor.
Research Organization:
Bechtel BWXT Idaho, LLC (Idaho Falls, ID)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC07-99ID13727
Assignee:
SRP Technologies, Inc. (Erie, CO)
Patent Number(s):
7,449,114
Application Number:
10/931,800
OSTI ID:
986215
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
Biological reductive dechlorination of tetrachloroethylene and trichloroethylene to ethylene under methanogenic conditions. journal January 1989
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
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
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
Isolation of a Bacterium That Reductively Dechlorinates Tetrachloroethene to Ethene journal June 1997

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Related Subjects

54 ENVIRONMENTAL SCIENCES
BIOREMEDIATION
DEHALOGENATION
ELECTRON TRANSFER
GROUND WATER
HALOGEN COMPOUNDS
MASS TRANSFER
MICROORGANISMS
ORGANIC SOLVENTS
POLLUTION