Toxicity and biodegradation of chlorophenols in anaerobic propionate enrichment culture

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Abstract:

The fate of four trichlorophenols (TCP), six dichlorophenols (DCP), and three monochlorophenols (CP), were studied in anaerobic propionate enrichment systems. TCPs were more toxic than DCPs and CPs; 2,4,5-TCP was most toxic to the propionate users among the 13 chlorophenols studied in this research. Most chlorophenols were dechlorinated reductively to less chlorinated compounds and/or phenol. Dechlorination at the ortho position was observed most frequently. The overall removal of the selected chlorophenols by anaerobic propionate enrichment systems were in the following order: 2,3,5-TCP > 2,3,6-TCP > 3,5-DCP > 2,4-DCP > 2-CP > 3,4-DCP; 2,3-DCP; 2,5-DCP > 3-CP > 2,4,5-TCP > 2,6-DCP > 2,4,6-TCP > 4-CP.

Keywords: ANAEROBIC TREATMENT; BIODEGRADATION; CHLOROPHENOLS; DECHLORINATION; METHANOGENS; PROPIONATE; TOXIC COMPOUNDS

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/106143097X125623

Publication date: July 1, 1997

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  • Water Environment Research® (WER®) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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