Field and laboratory evidence for intrinsic biodegradation of vinyl chloride contamination in a Fe(Ⅲ)-reducing aquifer

摘要

Intrinsic bioremediation of chlorinated ethenes in anaerobic aquifers previously has not been considered feasible, due, in large part, to 1)the production of vinyl chloride during microbial reductive dechlorination of higher chlorinated contaminants and 2)the apparent poor biodegrad- ability of vinyl chloride under anaerobic conditions. In this study, a combination of field geochemical analyses and laboratory radiotracer([1,2-~14C]vinyl chloride)experiments was utilized to assess the potential for intrinsic biodegradation of vinyl chloride contamination in an Fe(Ⅲ)-reducing, anaerobic aquifer.