Dehalogenation pathway and rate of chlorinated aromatic compounds in anaerobic sediment

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:452036

Masunaga, S; Nakanishi, J ^[1]; Susarla, S; Yonezawa, Y ^[2]

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1. Yokohama National Univ. (Japan). Inst. of Environmental Science and Technology
2. National Inst. for Resources and Environment, Tsukuba (Japan)

Biodegradation of about 70 haloaromatic compounds were studied in anaerobic sediment. The sediment was collected at the mouth of Tsurumi River that flows into Tokyo Bay. The place is fairly contaminated as the river receives effluent from various industries. Relative rate of degradation among different class of compounds were: chlorophenol > chlorobenzenes > chloroanilines > chlorinated pesticides. Various dehalogenated compounds were detected as intermediates, indicating that most of the biodegradation was due to dehalogenation. For polyhalogenated aromatics, the major and minor dehalogenation pathways were observed. The major pathways could be estimated from the redox potential of the reaction for chlorobenzenes and chloroanilines, but not for chlorophenols. The pseudo-first order reaction rate constant of each compounds was calculated and analyzed by quantitative structure-activity analysis.

• OSTI ID: 452036
• Report Number(s): CONF-961149--
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
ANAEROBIC CONDITIONS
BIODEGRADATION
CHLORINATED AROMATIC HYDROCARBONS
JAPAN
REMEDIAL ACTION
SEDIMENTS
STRUCTURE-ACTIVITY RELATIONSHIPS
WATER POLLUTION