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KMID : 1024520020110060589
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Journal of the Environmental Sciences
2002 Volume.11 No. 6 p.589 ~ p.596
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Photodegradation of Organophosphorous Pesticides using TiO₂ Photocatalyst Coated on Glass Plates in Circular Reactor
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Ryu Seong-Pil
Oh Youn-Keun
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Abstract
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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 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-/, PO3-/, SO2-/ and Cl-/ were found as end products on the photocatalytic degradation of chlorpyrifos and diazinon with TiO/UV.
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KEYWORD
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TiO₂/UV, AOP, Chlorpyrifos, Diazinon
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