Degradation Patterns of Orgaonophosphorus Insecticide, Chlorpyrifos by Functionalized Zerovalent Iron

기능화된 Zerovalent Iron에 의한 유기인계 살충제 Chlorpyrifos의 분해 특성

  • Kim, Dai-Hyeon (Division of Applied Biology and Chemistry, Kyungpook National University) ;
  • Choi, Choong-Lyeal (Division of Applied Biology and Chemistry, Kyungpook National University) ;
  • Kim, Tae-Hwa (Division of Applied Biology and Chemistry, Kyungpook National University) ;
  • Park, Man (Division of Applied Biology and Chemistry, Kyungpook National University) ;
  • Kim, Jang-Eok (Division of Applied Biology and Chemistry, Kyungpook National University)
  • 김대현 (경북대학교 응용생물화학부) ;
  • 최충렬 (경북대학교 응용생물화학부) ;
  • 김태화 (경북대학교 응용생물화학부) ;
  • 박만 (경북대학교 응용생물화학부) ;
  • 김장억 (경북대학교 응용생물화학부)
  • Published : 2007.12.31


An organophosphorus insecticide, chlorpyrifos, has been of a great concern due to persistence, toxicity and accumulation in soils and groundwaters. This study deals with degradation efficiency and dechlorination kinetics of chlorpyrifos by various types of zerovalent irons (ZVIs) for effective remediation of the soils contaminated with chlorinated pesticides. Chlorpyrifos degradation rate was increased with increasing ZVI treatment amount and reaction time. The degradation rate and dechlorination kinetics of chlorpyrifos increased in the order of mZVI > nZVI > cZVI in solutions and soils. Dechlorination number value of chlorpyrifos by cZVI, nZVI and mZVI treatment exhibited 1.08, 3.09 and 3.18, respectively. In soils, degradation efficiency and kinetics of chlorpyrifos significantly were affected by moisture content because of the limited contact between ZVIs and chlorpyrifos. These results suggest that nanosized and functionalized mZVI could be effectively applied to degradation of chlorinated pesticides in the soil and aqueous environments.


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