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- Title
Photodegradation of Imidacloprid and Fipronil in Rice-Paddy Water.
- Authors
Thuyet, Dang; Watanabe, Hirozumi; Yamazaki, Kenichi; Takagi, Kazuhiro
- Abstract
Photodegradation of insecticides, imidacloprid and fipronil, in rice-paddy water under the ambient temperature was investigated. The initial concentrations were set at 58.8 and 3.1 μg/L for imidacloprid and fipronil, respectively, according to their reported initial concentrations in the rice-paddy field. The half-lives (DT) of imidacloprid and fipronil were 24.2 and 36.7 h, respectively. Fipronil desulfinyl was detected as a major metabolite and fipronil sulfone was found to be a minor metabolite of fipronil in the photodegradation process. Detected mass of fipronil, fipronil desulfinyl, and fipronil sulfone at 79 h were 12.9%, 45.8%, and 5.2% of initial fipronil mass, respectively.
- Subjects
INSECTICIDES &; the environment; PHOTODEGRADATION; IMIDACLOPRID; AMBIENT temperature ferrite process; WATER pollution; SULFONES; METABOLITES
- Publication
Bulletin of Environmental Contamination & Toxicology, 2011, Vol 86, Issue 5, p548
- ISSN
0007-4861
- Publication type
Article
- DOI
10.1007/s00128-011-0243-x