摘要
以中压汞灯为光源，研究了甲黄隆在甲醇和丙酮等有机溶剂中的光解动力学，结果表明均为一级反应．甲黄隆在甲醇中的光解速率与在水中相差不大，而丙酮可明显促进其光解．甲黄隆在甲醇中光解先断裂脲桥，生成磺酰胺和取代三嗪。
Photodegradation behaviors of metsulfuronmethyl in methanol and acetone were studied with the irradiation of mediumpressure mercury lamp.The primary degradation of metsulfuron follows a pseudofirstorder kinetics both in methanol and acetone.The degradation rate in methanol is similar to that in water,while the rate in acetone is accelerated.In methanol,metsulfuron is phtolyzed to methyl 2(aminosulfonyl)benzoate and 2methoxy4methyl6amino1,3,5triazine,then the former product is degraded to methyl benzoate and methyl 2(sulhydryl)benzoate.
出处
《环境科学》
EI
CAS
CSCD
北大核心
1999年第5期66-71,共6页
Environmental Science
基金
国家自然科学基金
中科院土壤圈物质循环开放实验室开放基金
关键词
光解动力学
磺酰脲
甲黄隆
反应机理
除草剂
photolysis,kinetics,sulfonylurea,metsulfuronmethyl,reaction mechanism.
