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Biodegradation Pathways of Polychlorinated Biphenyls by Soil Fungus Aspergillus niger

Polychlorinated Biphenyl의 토양 미생물 Aspergillus niger에 의한 생분해 경로

Kim, Chang-Su;Lim, Do-Hyung;Keum, Young-Soo
김창수;임도형;금영수

  • Received : 2015.12.09
  • Accepted : 2016.02.22
  • Published : 2016.03.31

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

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Cited by

  1. Translocation of Polychlorinated Biphenyls in Carrot-Soil Systems vol.20, pp.3, 2016, https://doi.org/10.7585/kjps.2016.20.3.203

Acknowledgement

Grant : 작물 재배환경 중 유해화학물질의 안전관리기준 설정 연구

Supported by : 농촌진흥청