감마선 조사에 의한 농약 성분의 분해 연구
Study on Decomposition of Several Pesticides by Gamma-Irradiation
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The decomposition of 50 pesticides present in an aqueous solution using γ-irradiationfrom a 60Co gamma-ray source was investigated using laboratory-scale experiment. The rates ofdecomposition were determined using a gas chromatography-electron capture detector (GC-ECD),high-performance liquid chromatography-photo diode array detector (HPLC-PDA), and HPLCfluorescencedetector (FLD). When the initial concentration of pesticides was 10 ppm, and the radiationdose was 2, 5, 10, 20, and 30 kGy, respectively, 14 pesticide samples showed high removalrates (¤50%) at absorbed doses of more than 10 kGy. With the exception of procymidone, theywere all completely removed at a 30 kGy irradiation dose. These results provide fundamental dataon the reactivity between gamma-irradiation and pesticides in an aqueous solution. Further, anevaluation of the toxicity of radiolytic intermediate products is required.
Abstract
The decomposition of 50 pesticides present in an aqueous solution using γ-irradiationfrom a 60Co gamma-ray source was investigated using laboratory-scale experiment. The rates ofdecomposition were determined using a gas chromatography-electron capture detector (GC-ECD),high-performance liquid chromatography-photo diode array detector (HPLC-PDA), and HPLCfluorescencedetector (FLD). When the initial concentration of pesticides was 10 ppm, and the radiationdose was 2, 5, 10, 20, and 30 kGy, respectively, 14 pesticide samples showed high removalrates (¤50%) at absorbed doses of more than 10 kGy. With the exception of procymidone, theywere all completely removed at a 30 kGy irradiation dose. These results provide fundamental dataon the reactivity between gamma-irradiation and pesticides in an aqueous solution. Further, anevaluation of the toxicity of radiolytic intermediate products is required.
참고문헌 (10)
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