Reductive Dechlorination of Polychlorinated Biphenyls by Anaerobic Microorganisms from Sediments

@article{Quensen1988ReductiveDO,
  title={Reductive Dechlorination of Polychlorinated Biphenyls by Anaerobic Microorganisms from Sediments},
  author={John F. Quensen and James M. Tiedje and Stephen A. Boyd},
  journal={Science},
  year={1988},
  volume={242},
  pages={752 - 754}
}
Microorganisms from Hudson River sediments reductively dechlorinated most polychlorinated biphenyls (PCBs) in Aroclor 1242 under anaerobic conditions, thus demonstrating PCB dechlorination by anaerobic bacteria in the laboratory. The most rapid dechlorination was observed at the highest PCB concentration used; at 700 parts per million Aroclor, 53 percent of the total chlorine was removed in 16 weeks, and the proportion of mono- and dichlorobiphenyls increased from 9 to 88 percent… 

Anaerobic dechlorination of aroclor 1242 as affected by some environmental conditions

The effect of electron acceptors and biphenyl on reductive dechlorination was investigated using the commercial polychlorinated biphenyl mixture Aroclor 1242 and sediment microorganisms from the

Dechlorination of Fenclor 54 and of a synthetic mixture of polychlorinated biphenyls by anaerobic microorganisms

The low product yield deriving from reductive dechlorination of PCBs, and the slow rate of PCB biotransformation can be attributed to a lower dehalogenation capability of artificially contaminated soil microorganisms and, perhaps, also to the inadequacy of the adopted anaerobic medium.

Microbial reductive dechlorination of PCBs

It is now reasonable to field test reductive dechlorination of PCBs in cases where the PCB concentration is in the range where regulatory standards may be directly achieved by de chlorination, where a subsequent aerobic treatment is feasible, where any co-contaminants do not pose an inhibitory problem, and where anaerobic conditions can be established.

Microbial reductive dehalogenation of polychlorinated biphenyls.

  • WiegelWu
  • Environmental Science
    FEMS microbiology ecology
  • 2000
Temperature, pH, availability of naturally occurring or of supplemented carbon sources, and the presence or absence of H(2) or other electron donors and competing electron acceptors influence the de chlorination rate, extent and route of PCB dechlorination.

Reductive dechlorination of PCB-contaminated raisin river sediments by anaerobic microbial granules.

This study is the first demonstration of enhanced reductive dechlorination of sediment PCBs by an exogenous anaerobic microbial consortium.

Altered biologic activities of commercial polychlorinated biphenyl mixtures after microbial reductive dechlorination.

The data presented here establish that the biologic activities of commercial PCB mixtures are altered by microbial reductive dechlorination and that an assessment of their toxic potential requires an array of tests that include the different mechanisms associated with PCBs.
...

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