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KMID : 0903520000430020130
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Journal of the Korean Society of Agricultural Chemistry and Biotechnology
2000 Volume.43 No. 2 p.130 ~ p.135
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Aqueous Photolysis of the Organophosphorus InsecticideFlupyrazofos
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김용화/Kim, Yong Hwa
이재구/김균/정윤주/Lee, Jae Koo/Kim, Kyun/Jeong, Yun Ju
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Abstract
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Photodegradation rate of flupyrazofos in aqueous solution were measured under various test conditions mainly following the guidelines of U.S. EPA and OECD. It was observed that the flupyrazofos was degraded by simple hydrolysis but not degraded by light in pure water. Using acetone as a known photosensitizer, the minimal concentration of acetone needed to photo-degrade the flupyrazofos in % and molar terms were 0.047% and 0.006, respectively. When treated with acetone, it was also found that the ringlet oxygen is a very effective photo oxidant in the degradation of flupyrazofos, but the effect of hydroxyl radical was not observed at the treatment level of hydroxyl radical, isopropylbenzene. In an actinometer experiment, quantum yield of flupyrazofos (0.4 ppm with 2% acetone) was 17.66×10^(-5) and degradation rate and half-life were 0.038/hr and 18.2 hours, respectively.
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