Sequential reductive dehalogenation of chloroanilines by microorganisms from a methanogenic aquifer
Chloroaniline-based compounds are widely used chemicals and important contaminants of aquatic and terrestrial environments. The authors 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 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-triCA) and eventually 3,5-dichloroaniline (3,5-diCA). Similarly, when 3,4-diCA was used as a parent substrate, it was transformed to 3-chloro-aniline (3-CA). Metabolites and end products were identified by their chromatographic mobility and their mass spectral fragmentation pattern. The reaction helps suggest novel bioremediation approaches for aquifers and other environments contaminated with these chemicals.
- Research Organization:
- Oklahoma Univ., Norman, OK (USA). Dept. of Botany and Microbiology
- OSTI ID:
- 5103452
- Report Number(s):
- PB-90-117219/XAB
- Country of Publication:
- United States
- Language:
- English
Similar Records
Specificity of reductive dehalogenation of substituted ortho-chlorophenols by Desulfitobacterium dehalogenans JW/IU-DC1
Reductive dehalogenation of polybrominated and polychlorinated biphenyls by anaerobic microorganisms from sediment
Related Subjects
540320* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
AEROBIC CONDITIONS
AQUIFERS
AROMATICS
BACTERIA
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHLORINATED AROMATIC HYDROCARBONS
CHLORINATION
CONTROL
GROUND WATER
HALOGENATED AROMATIC HYDROCARBONS
HALOGENATION
HYDROGEN COMPOUNDS
KINETICS
LAND POLLUTION
MANAGEMENT
MASS SPECTROSCOPY
METHANOGENIC BACTERIA
MICROORGANISMS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
OXYGEN COMPOUNDS
PESTICIDES
POLLUTION
POLLUTION CONTROL
REACTION KINETICS
SOILS
SPECTROSCOPY
SURFACE WATERS
WASTE DISPOSAL
WASTE MANAGEMENT
WATER
WATER POLLUTION
WATER POLLUTION CONTROL