Transformation of Pentachlorophenol by Oxidoreductive Catalysts

산화환원 촉매에 의한 Pentachlorophenol의 Transformation

  • Park, Jong-Woo (Department of Agricultural Chemistry, Kyungpook National University) ;
  • Lee, Yun-Ki (Taegu Water Quality Examination Office) ;
  • Kim, Jang-Eok (Department of Agricultural Chemistry, Kyungpook National Univerisity)
  • 박종우 (경북대학교 농화학과) ;
  • 이윤기 (대구광역시 상수도사업본부 수질검사소) ;
  • 김장억 (경북대학교 농화학과)
  • Published : 1999.11.30

Abstract

Pentachlorophenol(PCP), which is very persistent in soil and water environment, was tried to detoxify with oxidoreductive catalysts(peroxidase, laccase, tyrosinase and birnessite). To find out detoxification of PCP, the transformation of PCP through oxidative coupling was investigated in the presence of various oxidoreductive catalysts. PCP incubated with peroxidase was significantly transformed, however, in case of tyrosinase, the transformation was negligible. Using peroxidase, the optimal reaction condition was pH 5.6 and $16^{\circ}C$. The transformation of PCP was very fast in initiation step until 30 min but, that was not observed after 180 min. The transformation of PCP was increased by increasing peroacidase amount. When the effect of humic monomer was investigated as co-substrate on the transformation of PCP, the transformation of PCP was mostly decreased in the incubation with peroxidase, laccase, and birnessite. The transformation of PCP, however, was slightly increased by the incubation with tyrosinase in the presence of humic monomers as co-substrate, except catechol. On the basis of the results obtained, it may be suggested that PCP is able to be effectively detoxified through oxidative coupling mediated with oxidoreductive catalysts.