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REDOX AND REDUCTION POTENTIALS AS PARAMETERS TO PREDICT THE DEGRADATION PATHWAY OF CHLORINATED BENZENES IN ANAEROBIC ENVIRONMENTS

DOLFING, J. & HARRISON, BK., Oct-1993, In : FEMS Microbial Ecology. 13, 1, p. 23-29 7 p.

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  • J DOLFING
  • BK HARRISON

The anaerobic degradation pathway of hexachlorobenzene starts with a series of reductive dehalogenation steps. In the present paper it was evaluated whether the dehalogenation pathway observed in microbial ecosystems could be predicted by the redox potential and/or the reduction potential (the latter determined in dimethylsulfoxide) of the various potential intermediates. It was found that these two parameters suggest different pathways. The redox potential correctly predicts the dominant pathway observed in microbial systems, while the reduction potential does not. The redox potential of the various redox couples showed no correlation with the kinetic constants for the various dechlorination steps as determined with a quantitative structure-activity relationship developed for the environmental reductive dehalogenation of chlorinated aromatic compounds, even though both approaches predicted the same pathway.

Original languageEnglish
Pages (from-to)23-29
Number of pages7
JournalFEMS Microbial Ecology
Volume13
Issue number1
Publication statusPublished - Oct-1993

    Keywords

  • THERMODYNAMICS, CHLORINATED BENZENE, REDOX POTENTIAL, QSAR, REDUCTIVE DEHALOGENATION, BIODEGRADATION, HALOGENATED AROMATIC-HYDROCARBONS, SEDIMENT SYSTEMS, STRAIN DCB-1, DECHLORINATION, ENERGY, GROWTH

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