Abstract

ARAOZ, B.  and  VIALE, A A.. Microbial dehalogenation of polychlorinated biphenyls in aerobic conditions. Rev. argent. microbiol. [online]. 2004, vol.36, n.1, pp.47-51. ISSN 0325-7541.

From soils contaminated with polychlorinated biphenils (PCBs) a strain of Alcaligenes sp. able to grow in a mineral medium with a commercial mixture of PCBs as carbon source was isolated. This strain consumed up to 200 ppm in seven days in laboratory conditions. After 24 h of incubation, some new congeners of PCBs could be recognized by mass spectrometry. Through the identification of these compounds it was possible to postulate examples of possible transformations by dechlorinations of penta- and tetra-chlorinated congeners into tri-chlorinated ones. The properties of the isolated strain are appropriate for bioremediation of contaminated areas and also for using in bioreactors in order to remove the xenobiotic chemical.

Keywords : PCBs biodegradation; PCBs dechlorination; Alcaligenes sp.

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