胺苯磺隆在环境水体中的光化学降解

Photochemical Degradation of Ethametsulfuron-methyl in Environmental Water Substance

研究了胺苯磺隆在不同水体中的稳定性及在高压汞灯下胺苯磺隆在不同水体中的光化学降解,同时研究了水体温度和pH值对胺苯磺隆光化学降解的影响。结果表明,胺苯磺隆在水体中的稳定性较好;高压汞灯下,胺苯磺隆在4种类型的水中的光解速率顺序为:蒸馏水>巢湖水>稻田水>池塘水;胺苯磺隆的光解半衰期先是随着温度的升高而不断增加,当温度升至40℃以后,光解半衰期基本保持一个稳定的水平;高压汞灯下胺苯磺隆在不同pH值缓冲溶液中的光解速率为:pH值4>pH值7>pH值9,pH值对胺苯磺隆在水中的光解影响较大。

The direct photolysis of ethametsulfuron-methyl in different aqueous solution irradiated by high pressure lamb light（HPML） was investigated. The effects of temperature, pH value on the photodegradation of ethametsulfuron-methyl in aqueous solution were studied. The results showed that Ethametsulfuron-methyl had a good stability in different natural water. The photolysis rates in four different types of water were ： distilled water 〉 Chaohu water 〉 cropland water 〉 pond water; Under HMPL irradiation, photolysis rate constant of it increased with water temperature. The photolysis rate constant didn＇ t increase when temperature was more than 40 ℃. The photolysis rate of it under different pH value was ： pH value4 〉 pH value7 〉 pH value9, pH value had a bigger effect on ethametsulfuron-methyl in Photolysis of water.