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Title: Anaerobic biodegradation of DDT residues (DDT, DDD, and DDE) in sediments.
Authors: Hui-Jung Huang
Shiu-Mei Liu
Cham-En Kuo
Contributors: 國立臺灣海洋大學:海洋生物研究所
Keywords: Estuarine sediment
Date: 2001
Issue Date: 2018-05-02T03:47:58Z
Publisher: Journal of Environmental Science and Health, Part B
Abstract: Abstract: The potential for anaerobic biodegradation of 1,1,1-trichloro-2,2-bischlorophenylethane (DDT), 1,1-dichloro-2,2,-bischlorophenylethane (DDD), and dichlorodiphenylchloroethylene (DDE) in anoxic sediment slurries collected from the Keelung River was investigated in this study. o,p′- and p,p'-DDT were dechlorinated to o,p'- and p,p'-DDD, respectively, and then transformed to other compound(s). 1-Chloro-2,2-bis (p-chlorophenyl) ethylene (DDMU) and trace amount of dichlorobenzophenone (DBP) were detected in sediment slurries amended with p,p'-DDT or p,p'-DDD. DDMU was also detected in sediment slurries amended with p,p'-DDE. The relative transformation rates for both o,p'- and p,p'-isomers of DDT, DDD, and DDE were DDT>DDD>DDE. Re-addition of DDT, DDD, or DDE to the sediment slurries after initial removal enhanced the respective dechlorination rates. The transformation rates of the p,p'-isomers of both DDT and DDD were faster than those of the respective o,p'-isomers. p,p'-DDT dechlorination in the p,p'-DDT-adapted sediment slurries were inhibited by the addition of molybdate, or molybdate plus sulfate, but not inhibited by the addition of sulfate. Addition of bromoethanesulfonic acid (BESA) slightly inhibited p,p'-DDT dechlorination. Non-adapted sediment slurries lost the ability to dechlorinate pentachlorophenol during adaptation to p,p'-DDT. p,p'-DDD was the major transformation product of p,p'-DDT in 3,4,4′,5-tetrachlorobiphenyl-adapted sediment slurries, which suggested that the microbial community in the 3,4,4′,5-CB-adapted sediment was unable to remove chlorine from the aromatic rings of p,p'-DDT.
Relation: 36(3) pp.273-288
Appears in Collections:[Institute of Marine Biology] Periodical Articles

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