Influence of incubation temperature on the microbial reductive dechlorination of 2,3,4,6-tetrachlorobiphenyl in two freshwater sediments
Article Abstract:
The rate of 2,3,4,6-tetrachlorobiphenyl dechlorination differs as a function of the type of sediment and incubation temperature. The polychlorinated biphenyl (PCB) -free freshwater sediments have a lower dechlorination rate at a temperature of 30 degree celsius (C) as compared to PCB-contaminated freshwater sediments. Similar factors are responsible for the control of meta and para PCB dechlorination over a temperature range of 18 to 30 degree C in PCB-free sediment. However, multiple factors control ortho, meta and para dechlorination in PCB-contaminated sediment.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1996
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Anaerobic dehalogenation of hydroxylated polychlorinated biphenyls by Desulfitobacterium dehalogenans
Article Abstract:
Para-hydroxylated polychlorinated biphenyls undergo rapid anaerobic dehalogenation by Desulfitobacterium dehalogenans. Desulfitobacterium dehalogenans totally dehalogenates all bordering chlorines from congeners such as 3,3', 5,5'-tetrachloro-4,4'-dihydroxybiphenyl. The bulky phenyl ring in the ortho position to the hydroxyl group hinders the correct interaction between the hydroxyl group and the enzyme, suggesting that no proper binding of these congeners to the dehalogenating enzyme of Desulfitobacterium takes place.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1999
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Effect of incubation temperature on the route of microbial reductive dechlorination of 2,3,4,6 -Tetrachlorobiphenyl in polychlorinated biphenyl (PCB)-contaminated and PCB-Free fresh water sediments
Article Abstract:
The effect of incubation temperature on the route of microbial reductive dechlorination of 2,3,4,6-tetrachlorobiphenyl in polychlorinated biphenyl (PCB)-contaminated and PCB-free freshwater sediments was studied. The research described dechlorination reactions which exhibited strong temparature dependencies. Results reveal that field temperatures can be expected to play an important role in determining the extent of PCB dechlorination at a given site.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1997
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