| Title: |
Evaluation of the Role of Dehalococcoides Organisms in the Natural Attenuation of Chlorinated Ethylenes in Ground Water
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| Resource Type: |
document --> technical publication --> report
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| Country: |
USA
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| Year: |
2007 |
| Availability: |
EPA 600-R-06-029
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| Author 1/Producer: |
US EPA
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| Author / Producer Type: |
Agency, regulator or other governmental or inter-governmental body
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| Format (e.g. PDF): |
PDF
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| Size: (e.g. 20mb) |
2.22
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EUGRIS Keyword(s): |
Contaminated land-->Remediation options-->MNA
Contaminated land-->Soil and groundwater processes-->Microbiology
Groundwater protection-->Groundwater processes-->Microbiology
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| Short description: |
At most hazardous waste sites where monitored natural attenuation (MNA) of chlorinated solvents in
ground water is successful as a remedy, the chlorinated solvents are biologically degraded to harmless
end products such as ethylene or ethane. Many organisms can degrade chlorinated solvents such as
tetrachloroethylene or trichloroethylene, to dichloroethylene and vinyl chloride. This contributes little to
risk reduction because vinyl chloride is more toxic and more carcinogenic than tetrachloroethylene or
trichloroethylene. The only organisms known to degrade dichloroethylenes and vinyl chloride to ethylene
or ethane are members of the Dehalococcoides group. As a result, these organisms have a critical role
in the evaluation of MNA at chlorinated solvent sites. In recent years, biochemical assays for the presence
of DNA from the organisms have become commercially available. These assays are based on the
polymerase chain reaction (PCR) for the amplification of DNA extracted from ground water. They are
very sensitive and can be very specific.
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Submitted By:
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Professor Paul Bardos WhoDoesWhat?
Last update: 16/04/2007
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