[Degradation of diuron by persulfate oxidation activated by EDTA-ferrous ion in aqueous system].
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 K2S2O8 initial concentration 2.0 mmol x L(-1), Fe(II) initial concentration 1.0 mmol x L(-1), EDTA initial concentration 0.5 mmol x L(-1), reaction time 300 min and pH = 7.0, about 67.6% of 0.1 mmol x L(1) diuron was degradation. Hydroxyl radicals and sulfate radicals produced in the system were determined by molecular probes (ethanol and tert-butanol) methods. The degradation products of diuron were identified with LC/MS methods and the degradation pathways of diuron were discussed.
Zhang
Jin-Feng
JF
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, China.
Yang
Xi
X
Zheng
Wei
W
Kong
Ling-Ren
LR
Wang
Lian-Hong
LH
D004237:Diuron / Q000737:chemistry*; D004492:Edetic Acid / Q000737:chemistry*; D005296:Ferrous Compounds / Q000737:chemistry*; D006540:Herbicides / Q000737:chemistry*; D010084:Oxidation-Reduction; D012996:Solutions / Q000737:chemistry; D013885:Thiosulfates / Q000737:chemistry
D005296:Ferrous Compounds; D006540:Herbicides; D012996:Solutions; D013885:Thiosulfates; C055526:Fe(II)-EDTA; D004492:Edetic Acid; D004237:Diuron; C042124:potassium thiosulfate