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Photodegradation of Organophosphorous Pesticides using TiO2 Photocatalyst Coated on Glass Plates in Circular Reactor

순환식 반응기에서 유리판에 코팅된 TiO2 광촉매를 이용한 유기인계 농약의 광분해

  • 류성필 (제주대학교 환경공학과) ;
  • 오윤근 (제주대학교 환경공학과)
  • Published : 2002.06.01

Abstract

Photocatalytic degradation of chlorpyrifos and diazinon, which are extensively used as an organophosphorous pesticide in the agriculture field, has been investigated with UV-radiated TiO$_2$ in aqueous phase. Photodegradation rate was increased with increasing pH of the solution. The removal efficiencies of chlorpyrifos and diazinon were 100% after 200 min in pH 9. Photodegradation followed a pseudo-first-order reaction. The rate constants of chlorpyrifos and diazinon were 0.0160min$\^$-1/ and 0.0180min$\^$-1/, respectively. NO$_3$$\^$-/, PO$_4$$\^$3-/, SO$_4$$\^$2-/ and Cl$\^$-/ were found as end products on the photocatalytic degradation of chlorpyrifos and diazinon with TiO$_2$/UV.

Keywords

TiO$_2$/UV;AOP;Chlorpyrifos;Diazinon

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