研究简报
司友斌,岳永德,汤锋,陈怀满.磺酰脲类除草剂在硅胶G表面的光解[J].环境科学学报,2002,22(2):270-272
磺酰脲类除草剂在硅胶G表面的光解
- Photodegradation of sulfonylurea herbicides on silica gel
- 基金项目：国家自然科学基金项目(编号29877001)
- 作者
- 单位
- 司友斌
- 1. 中国科学院南京土壤研究所,南京 210008; 2. 安徽农业大学植保系环境工程教研室,合肥 230036
- 岳永德
- 中国科学院南京土壤研究所,南京 210008
- 汤锋
- 中国科学院南京土壤研究所,南京 210008
- 陈怀满
- 安徽农业大学植保系环境工程教研室,合肥 230036
- 摘要：应用高效薄层析方法研究了苄嘧磺隆、甲磺隆、氯磺隆、氯嘧磺隆4种磺酰脲类除草剂在氙灯与太阳光下的光解动力学,以及8种有机色素对苄嘧磺隆光降解的影响.结果表明4种除草剂在硅胶G表面的降解呈一级动力学反应;有机色素对除草剂的降解均表现显著的猝灭效应,其中以姜黄素的猝灭作用最强.色素剂量与光解中的猝灭效应存在着显著的相关性,色素剂量加大,猝灭效应加强.
- Abstract：The photodegradation kinetics of four sulfonylurea herbicides (bensulfuron methyl, metsulfuron methyl, chlorimuron and chlorsulfuron) were studied by high performance thin layer chromatography under Xe lamp and sunlight. The primary degradation of each herbicide followed a pseudo first order kinetics. Organic pigments showed remarkable photo quenching effects on the photolysis of bensulfuron methyl. The photo quenching effect of curcumin was the strongest in 8 organic pigments. The photo quenching effects were significantly and positively related to the dosage of organic pigment.
- Key words：photolysis sulfonylurea herbicides kinetics
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