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Biodegradation Pathways of Polychlorinated Biphenyls by Soil Fungus Aspergillus niger
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 Title & Authors
Biodegradation Pathways of Polychlorinated Biphenyls by Soil Fungus Aspergillus niger
Kim, Chang-Su; Lim, Do-Hyung; Keum, Young-Soo;
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 Abstract
As of many organochlorine pesticides, polychlorinated biphenyls are ubiquitous organic contaminants, which can be found in the most environmental matrices. Their toxic effects include endocrinedisrupting activity. Most researches with these toxicants performed with mixtures of congeners, namely Aroclor and related study has been done in complex environmental matrix, rather than single biosystems or pure congeners. 5 congeners were synthesized and their fates in pure microbial culture (Aspergillus niger) were determined in this study. Among biphenyl and synthetic congeners, biphenyl, PCB-1 (2-chlorobiphenyl), and PCB-3 (4-chlorobiphenyl) were rapidly transformed to hydrophilic metabolites, followed by PCB-38 (3,4,5-trichlorobiphenyl), while the degradation of PCB-126 (3,3',4,4',5-pentachlorobiphenyl) was not observed. The amounts of transformation for biphenyl, PCB-1, PCB-3, and PCB-38 were 65, 38, 52, and 2% respectively. The major metabolites of the above congeners were identified as mono- and di-hydroxy biphenyls, which are known to give adverse endocrinological effects.
 Keywords
Polychlorinated biphenyl;soil;microorganism;biodegradation;Aspergillus niger;
 Language
Korean
 Cited by
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