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SEQUENTIAL REDUCTIVE DEHALOGENATION OF CHLORANILINES BY MICROORGANISMS FROM A METHANOGENIC AQUIFER
Citation:
Kuhn, E. AND J. Suflita. SEQUENTIAL REDUCTIVE DEHALOGENATION OF CHLORANILINES BY MICROORGANISMS FROM A METHANOGENIC AQUIFER. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-89/103 (NTIS PB90117219), 1989.
Description:
Chloroaniline-based compounds are widely used chemicals and important contaminants of aquatic and terrestrial environments. We have found that chloroanilines can be bio-logically dehalogenated in polluted aquifers when methanogenic, but not sulfate-reducing conditions prevail. The halogens are replaced by protons in a series-of reductive steps catalyzed by microorganisms. The sequential release of halogens from the para and ortho position of 2,3,4,5-tetrachloroaniline (2,3,4,5-tetraCA) resulted in the formation of 2,3,5-trichloroaniline (2,3,5,-tetraCA) and eventually 3,5-dichloroaniline (3,5-diCA). Similiarly, when 3,4,-diCA was used as a parent substrate, it was transformed to 3-chloroaniline (3-CA). Metabolities and end products were identified by their chromatgraphic mobility and their mass spectral fragmentation pattern. This reaction helps suggest novel bioremediation approaches for aquifers and other environments contaminated with these chemicals.
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SEQUENTIAL REDUCTIVE DEHALOGENATION OF CHLORANILINES BY MICROORGANISMS FROM A METHANOGENIC AQUIFER