Mechanisms and pathways of aniline elimination from aquatic environments
The fate of aniline, a representative of arylamine pollutants derived from the manufacture of dyes, coal liquefaction, and pesticide degradation, was comprehensively evaluated by use of unpolluted and polluted pond water as model environments. Evaporation plus autoxidation proved to be minor elimination mechanisms, removing ca. 1% of the added aniline per day. Instantaneous binding to humic components of a 0.1% sewage sludge inoculum removed 4%. Biodegradation of aniline in pond water was accelerated by the sewage sludge inoculum. A substantial portion of the degraded aniline carbon was mineralized to CO/sub 2/ within a 1-week period, and microbial biomass was formed as a result of analine utilization. Biodegradation was clearly the most significant removal mechanism of polluting aniline from pond water. A gas chromatographic-mass spectrometric analysis of biodegradation intermediates revealed that the major pathway of aniline biodegradation in pond water involved oxidative deamination to catechol, which was further metabolized through cis,cis-muconic, beta-ketoadipic, levulinic, and succinic acid intermediates to CO/sub 2/. Minor biodegradation pathways involved reversible acylation to acetanilide and formanilide, whereas N-oxidation resulted in small amounts of oligomeric condensation products. 36 references, 4 figures, 3 tables.
- Research Organization:
- Cook Coll., Rutgers Univ., New Brunswick, NJ
- OSTI ID:
- 6098617
- Journal Information:
- Appl. Environ. Microbiol.; (United States), Vol. 48:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ANILINE
BIODEGRADATION
MINERALIZATION
REMOVAL
MICROORGANISMS
METABOLISM
BIOLOGICAL PATHWAYS
CARBON DIOXIDE
EVAPORATION
EXPERIMENTAL DATA
GAS CHROMATOGRAPHY
LAKES
MASS SPECTROSCOPY
PYROCATECHOL
SEWAGE SLUDGE
WATER POLLUTION
AMINES
AROMATICS
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
CHROMATOGRAPHY
DATA
DECOMPOSITION
DEVELOPERS
HYDROXY COMPOUNDS
INFORMATION
NUMERICAL DATA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PHENOLS
POLLUTION
POLYPHENOLS
SEPARATION PROCESSES
SEWAGE
SLUDGES
SPECTROSCOPY
SURFACE WATERS
WASTES
560302* - Chemicals Metabolism & Toxicology- Microorganisms- (-1987)