Microbial dehalogenation of polychlorinated biphenyls in aerobic conditions.
From soils contaminated with polychlorinated biphenyls (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.
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Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellón II 1428 Ciudad de Buenos Aires, Argentina.
Viale
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D000421:Alcaligenes / Q000378:metabolism*; D001673:Biodegradation, Environmental; D019149:Bioreactors; D002713:Chlorine / Q000378:metabolism; D015394:Molecular Structure; D011078:Polychlorinated Biphenyls / Q000378:metabolism*; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000378:metabolism*
D012989:Soil Pollutants; D002713:Chlorine; D011078:Polychlorinated Biphenyls