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SEQUENTIAL REDUCTIVE DEHALOGATION OF CHLOROANILINES BY MICROORGANISMS FROM A METHANOGENIC AQUIFER
Citation:
Kuhn, E. P. AND J. M. Suflita. SEQUENTIAL REDUCTIVE DEHALOGATION OF CHLOROANILINES BY MICROORGANISMS FROM A METHANOGENIC AQUIFER. ENVIRONMENTAL SCIENCE & TECHNOLOGY 23(7):848-852, (1989).
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Description:
Chloroaniline-based compounds are widely used chem- icals and important contaminants of aquatic and terrestrial environments. We have found that chloroanilines can be biologically dehalogenated in polluted aquifers when methanogenic, but not sulfate-reducing conditions prevail. The halogens are replaced by protons in a series of re- ductive 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-triCA) and even- tually 3,5-dichloroaniline (3,5-diCA). Similarly, when 3,4-diCA was used as a parent substrate, it was trans- formed to 3-chloroaniline (3-CA). Metabolites and end products were identified by their chromatographic mobility and their mass spectral fragmentation pattern. This re- action helps suggest novel bioremediation approaches for aquifers and other environments contaminated with these chemicals.
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SEQUENTIAL REDUCTIVE DEHALOGATION OF CHLOROANILINES BY MICROORGANISMS FROM A METHANOGENIC AQUIFER
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