Previous investigations demonstrated that respiratoly reductive dechlorination of vinyl chloride (VC) can be efficient even at H2 concentrations (≤2 nM) that are characteristic of SO4-reducing conditions. In the study reported here, microorganisms indigenous to a lake-bed sediment completely mineralized [1,2-14C] ethene to 1414CO2 when incubated under SO4-reducing conditions. Together, these observations argue for a novel mechanism for the net anaerobic oxidation of VC to CO2: reductive dechlorination of VC to ethene followed by anaerobic oxidation of ethene to CO2. Moreover, the results of this study suggest that reliance on ethene and/or ethane accumulation as a quantitative indicator of complete reductive dechlorination of chioroethene contaminants may not be warranted.
|Publication Subtype||Journal Article|
|Title||Microbial mineralization of ethene under sulfate-reducing conditions|
|Series title||Bioremediation Journal|
|Contributing office(s)||Toxic Substances Hydrology Program|
|Google Analytic Metrics||Metrics page|