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Photodegradation of herbicide metamifop in aqueous solution : 제초제 metamifop의 수중 광분해

DC Field Value Language
dc.contributor.advisor김정한-
dc.contributor.author이호주-
dc.date.accessioned2010-06-07T04:22:08Z-
dc.date.available2010-06-07T04:22:08Z-
dc.date.copyright2003.-
dc.date.issued2003-
dc.identifier.urihttp://dcollection.snu.ac.kr:80/jsp/common/DcLoOrgPer.jsp?sItemId=000000058960-
dc.identifier.urihttps://hdl.handle.net/10371/67519-
dc.descriptionThesis (master`s)--서울대학교 대학원 :농생명공학부,2003.en
dc.description.abstractThis work is a laboratory study of the abiotic degradation by photolysis
of metamifop in aqueous solution. In direct photolysis, half-life of
metamifop, (R)-2-[4-(6-chloro-1,3-benzoxalzol-2-yloxy)phenoxy]-N-
(2-fluorophenyl)-N-methyl propionamide, was 248 days and quantum
yield was 1.10×10-5 under sunlight.
In indirect photolysis, degradation of metamifop was enhanced by
chemical sensitizer. Half-life of metamifop were 128 days for synthetic
humic water, 122 days for paddy water, and 18.8 days for acetonecontaining
water under sunlight.
Photodegradation of metamifop was increased greatly under UV-B
(312nm) and C (254nm) lamp, but UV-A (365nm) was not affected to
its degradation. In aqueous acetonitrile solution, half-life were 63.6 and
29.6 min under UV-B and C, respectively. In acetonitrile solution, halflife
were 43.9 and 20.5 min under UV-B and C, respectively. In
methanol solution, half-life were 38.7 and 18.8 min under UV-B and C,
repectively. In order to investigate metabolites, highly concentrated
solution (250ppm, in acetonitrile) was irradiated under UV-C, and then
7 metabolites were identified as 4-(6-chloro-benzooxazol-2-yloxy)-phenol, N-(2-Fluoro-phenyl)-2-hydroxy-N-methyl-propionamide, N-(2-
Fluoro-phenyl)-2-(4-hydroxy-phenoxy)-N-methyl-propionamide, 3HBenzooxazol-
2-one, 2-[4-(Benzooxazol-2-yloxy)-phenoxy]-N-(2-
fluoro-phenyl)-N-methyl-propionamide, 6-chloro-3H-benzooxazol-2-
one.
Key words : Metamifop, photolysis, direct photolysis, indirect
photolysis, acetone, UV-A, UV-B, UV-C, photoproducts
en
dc.format.extentix, 87 leavesen
dc.language.isoenen
dc.publisher서울대학교 대학원en
dc.subjectMetamifopen
dc.subjectPhotolysisen
dc.subjectDirect photolysisen
dc.subjectIndirect photolysisen
dc.subjectAcetoneen
dc.subjectUV-Aen
dc.subjectUV-Ben
dc.subjectUV-Cen
dc.subjectPhotoproductsen
dc.titlePhotodegradation of herbicide metamifop in aqueous solutionen
dc.title.alternative제초제 metamifop의 수중 광분해-
dc.typeThesisen
dc.contributor.department농생명공학부-
dc.description.degreeMasteren
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