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- Title
Degradation of polychlorinated biphenyl (PCB) by a consortium obtained from a contaminated soil composed of Brevibacterium, Pandoraea and Ochrobactrum.
- Authors
Juan Liz; Janet Jan-Roblero; Javier de la Serna; Arturo de León; César Hernández-RodrÃguez
- Abstract
Abstract  An indigenous polychlorinated biphenyl (PCB)-degrading bacterial consortium was obtained from soils contaminated by transformer oil with a high content of PCBs. The PCB degrader strains were isolated and identified as Brevibacterium antarcticum, Pandoraea pnomenusa, and Ochrobactrum intermedium by 16S rRNA gene sequence phylogenetic analysis. The PCB-degrading ability of the consortium and of individual strains was determined by using GC/MS. The PCB-degrading capacities of the consortium were evaluated for three concentrations of transfomer oil ranging from 55 to 152 μM supplemented with 0.001% biphenyl and 0.1% of Tween 80 surfactant. PCB biodegradation by the consortium was favored in the presence of both additives and the greatest extent of biodegradation (67.5%) was obtained at a PCB concentration of 55 μM. Each bacterial species exhibited a particular pattern of degradation relating to specific PCB congeners. Isolated strains showed a moderate degradation capability towards tetra-, hepta-, and octa-chlorobiphenyls; although no effect on penta-, hexa-, and nona-chlorobiphenyls was observed. Recently, PCB degradation capacity was recognized in a Pandorea member; however, this is the first study that describes the ability of Brevibacterium and Ochrobactrum species to degrade PCBs.
- Subjects
POLYCHLORINATED biphenyls; BREVIBACTERIUM; BIODEGRADATION; SOIL pollution; INSULATING oils; BACTERIAL genetics; SOIL microbiology
- Publication
World Journal of Microbiology & Biotechnology, 2009, Vol 25, Issue 1, p165
- ISSN
0959-3993
- Publication type
Article
- DOI
10.1007/s11274-008-9875-3