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以汞灯为光源，研究了甲黄隆、苯黄隆，氯黄隆、氯嘧黄隆、苄嘧黄隆和胺苯黄隆６种磺酰脲类除草剂在水溶液中的光解动力学．结果表明５种磺酰脲的降解呈一级动力学反应（苯黄隆除外）；体系的ｐＨ值对降解速率影响不明显，光强的影响较明显；Ｈ２Ｏ２、丙酮和溶解有机质（ＤＯＭ）均可促进磺酰脲光解；溶解氧对该类除草剂光解的影响表现为光氧化与光淬灭２种作用的竞争．
The photolysis kinetics of six sulfonylurea herbicides in the aqueous solution of metronidazole, metronidazole, chlorpyrifos, chlorimuron, bensulfuron and ammembran was studied with mercury lamp as light source . The results showed that the degradation of five sulfonylureas was a first-order kinetic reaction (except for phenylmercuron); the pH value of the system had no obvious effect on the degradation rate and the light intensity was obvious; and both H2O2, acetone and dissolved organic matter Can promote the sulfonylurea photolysis; the effect of dissolved oxygen on the photodegradation of these herbicides shows the competition of two functions of photooxidation and light quenching.