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《Journal of Anhui Agricultural Sciences》 2008-05
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Study on the Photochemical Degradation of Tetramethrin in Water

WU Feng et al(College of Environment and Resources,Anhui Agricultural University,Hefei,Anhui 230036)  
[Objective] The aim was to seek for the photochemical degradation approach of controlling tetramethrin pollution in water.[Method] The influences of 3 light sources,2 humic acid concentrations,3 pigments and 3 surfactants on the photochemical degradation of tetramethrin pesticides in water were studied.[Result] The influences of different light sources on the photodegradation of tetramethrin in water had bigger difference,tetramethrin degraded fastest under high pressure mercury lamp,secondarily under ultraviolet and slowest under sunlight and their photodegradation half lives were 93.6,95.2 and 200.0 min resp.Humic acid had significant photosensitization on tetramethrin,and its photosensitization increased rapidly as the humic acid concentration increased.Under the irradiation of high pressure mercury lamp,3 pigments such as lactoflavin,methylene blue and methyl green all had photosensitization on tetramethrin to some degree,in which the photosensitization of lactoflavin was most significant and along with the increment of lactoflavin concentration,the photodegradation rate of tetramethrin showed the trend of increasing first and then tending to slow.Non-ionic surfactant Span-20 had very obvious photosensitization on the photochemical degradation of tetramethrin.[Conclusion] The study supplied reference for controlling tetramethrin pesticide pollution in water.
【CateGory Index】: X592
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