Reductive dechlorination of chlorophenols by a pentachlorophenol- acclimated methanogenic consortium
| Autor: | Jonathan D. Istok, D K Nicholson, D C Peek, Sandra L. Woods |
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| Rok vydání: | 1992 |
| Předmět: |
Chromatography
Pentachlorophenol Ecology Metabolite Microorganism Biodegradation Euryarchaeota Applied Microbiology and Biotechnology Adaptation Physiological chemistry.chemical_compound Anaerobic digestion Biodegradation Environmental chemistry Biotransformation Environmental chemistry Reductive dechlorination Environmental Pollutants Phenols Oxidation-Reduction Food Science Biotechnology Chlorophenols Research Article |
| Zdroj: | Applied and environmental microbiology. 58(7) |
| ISSN: | 0099-2240 |
| Popis: | Anaerobic digester sludge fed 5,300 mg of acetate per liter, 3.4 microM pentachlorophenol, and nutrients for 10 days biotransformed pentachlorophenol by sequential ortho dechlorinations to produce 2,3,4,5-tetrachlorophenol and 3,4,5-trichlorophenol. Upon acclimation to 3.4 microM pentachlorophenol for 6 months, the methanogenic consortium removed chlorines from the ortho, meta, and para positions of pentachlorophenol and its reductive dechlorination products. Pentachlorophenol was degraded to produce 2,3,4,5-tetrachlorophenol, 2,3,4,6-tetrachlorophenol, and 2,3,5,6-tetrachlorophenol. Dechlorination of 2,3,4,5-tetrachlorophenol produced 3,4,5-trichlorophenol, which was subsequently degraded to produce 3,4-dichlorophenol and 3,5-dichlorophenol. 2,3,4,6-Tetrachlorophenol was dechlorinated at the ortho and meta positions to produce 2,4,6-trichlorophenol and 2,4,5-trichlorophenol. 2,3,5,6-Tetrachlorophenol yielded 2,3,5-trichlorophenol, followed by production of 3,5-dichlorophenol. 2,4,6-Trichlorophenol was degraded to form 2,4-dichlorophenol, and 2,4,5-trichlorophenol was dechlorinated at two positions to form 2,4-dichlorophenol and 3,4-dichlorophenol. Of the three dichlorophenols produced (2,4-dichlorophenol, 3,4-dichlorophenol, and 3,5-dichlorophenol), only 2,4-dichlorophenol was degraded significantly within 3 weeks, to produce 4-chlorophenol. |
| Databáze: | OpenAIRE |
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