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KMID : 1024520020110101103
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Journal of the Environmental Sciences
2002 Volume.11 No. 10 p.1103 ~ p.1108
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A Study on the Degradation Characteristics of EPN
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Lee Yong-Doo
Kim Hyun-Hee
Kim Chang-Young
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Abstract
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In order to evaluate the degradation organophosphorus pesticide, EPN, in water environment, the effects of water temp.(10), pH(3-11) and sunlight on its degradation were investigated during 10 days. The degradation rate of EPN(200 rpm) was faster at higher water temp. and higher pH, i.e., its degradation rate at pH 3, 5, 7, 9, 11 was 57, 63, 66, 69, 75%(1), and 70, 74, 79, 91, 97%(3) after 10 days, respectively. The effect of water temp. on its degradation was little in acidic condition, but was rather great in alkaline condition, with time. EPN was degraded fast at the alkaline condition by photolysis. At the condition of pH 11, EPN was degraded fast at the early stage in the first 2 days, but after that the degradation rate was weakened.
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KEYWORD
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EPN, Degradation rate, Hydrolysis, Photolysis, pH
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