中文摘要：

对水体系中EDTA-Fe（Ⅱ）/K2S2O8降解敌草隆的方法进行了研究.在综合考虑经济性和降解率的前提下,提出了反应的最佳条件：K2S2O8初始浓度为2.0 mmol·L^-1,Fe（Ⅱ）初始浓度为1.0 mmol·L^-1,EDTA初始浓度为0.5 mmol·L^-1,反应时间为300 min,pH=7.0,最终0.1 mmol·L^-1敌草隆降解率可达67.6%.同时,采用分子探针竞争实验鉴定了体系中产生的硫酸根自由基和羟基自由基,并采用LC/MS法鉴定了敌草隆的主要降解产物,从而探讨了敌草隆在EDTA-Fe（Ⅱ）/K2S2O8体系中可能的降解途径.

英文摘要：

The method of diuron [ 3- （3,4- dichlorophenyl）- 1,1-dimethylurea ] degradation by persulfate oxidation activated by EDTA-ferrous ion in aqueous system was conducted. Based on both of the degradation performance and the operating costs, optimal reaction condition was proposed. Operating at K2 S2O8 initial concentration 2.0 mmol·L^-1 , Fe（Ⅱ） initial concentration 1.0 mmol·L^-1 , EDTA initial concentration 0.5 mmol·L^-1 , reaction time 300 min and pH = 7.0, about 67.6% of 0.1 mmol·L^-1 diuron was degradation. Hydroxyl radicals and sulfate radicals produced in the system were determined by molecular probes （ethanol and ten-butanol） methods. The degradation products of diuron were identified with LC/MS methods and the degradation pathways of diuron were discussed.