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首页> 外文期刊>Pesticide Research Journal >Effect of Surfactants and Sensitizer on Photolysis Rate of Tribenuron-methyl in Aqueous Solution
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Effect of Surfactants and Sensitizer on Photolysis Rate of Tribenuron-methyl in Aqueous Solution

机译：表面活性剂和敏化剂对水溶液中苯磺隆的光解速率的影响

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摘要

The effect of two non-ionic surfactants (Tween-80 and Triton X-100) and a sensitizer (riboflavin) on the rate of photolysis of tribenuron-methyl, a sulfonylurea herbicide, in aqueous solution was studied under sunlight and UV-light. Both the surfactants and the sensitizer significantly enhanced the rate of photodegradation of tribenuron-methyl in HPLC grade water. The calculated half-life values of tribenuron-methyl in water with no surfactant/sensitizer were 18.3 h under UV-light and 30.4 d under sunlight as compared to 1.7,2.5 and 2.8 h under UV-light and 6.6,8.4 and 6.8 d under sunlight in water containing Tween-80, Triton X-100 and riboflavin, respectively. The surfactant and carrier used in 10% WP formulation of tribenuron-methyl also enhanced its rate of degradation in aqueous solution with half-life values of 10.7 d in sunlight and 4.1 h in UV-light. The enhancement in the rate of photolysis of tribenuron-methyl in water by Tween-80 than by Triton X-100 may be the result of photosensitization.
机译：研究了两种非离子表面活性剂（Tween-80和Triton X-100）和敏化剂（核黄素）对磺酰脲类除草剂丁苯磺隆甲基在水溶液中的光解速率的影响。表面活性剂和敏化剂均显着提高了HPLC级水中甲基苯磺隆的光降解速率。在不使用表面活性剂/敏化剂的水中，苯磺隆的半衰期计算值在紫外线下为18.3 h，在阳光下为30.4 d，而在紫外线下为1.7,2.5和2.8 h，在紫外线下为6.6、8.4和6.8 d。分别包含Tween-80，Triton X-100和核黄素的水中的阳光。在苯磺隆甲基的10％WP配方中使用的表面活性剂和载体还提高了其在水溶液中的降解速度，其半衰期在阳光下为10.7 d，在紫外线下为4.1 h。 Tween-80比Triton X-100增强水中苯磺隆的光解速率可能是光敏作用的结果。

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