Studies on Fe(II)/S_2O_8~(2-)-S_2O_3~(2-) degrading diuron in aqueous system

In the aqueous system of initial pH value of 7.0 through orthogonal test and individual factor test,the optimal operation condition of Fe(Ⅱ)/S2O82-S2O32-degrading diuron was determined to be Na2S2O8 concentration 2.0mmol/L,Fe(Ⅱ) concentration 1.0mmol/L,Na2S2O3 concentration 0.5mmol/L under the condition of reaction time 120min,0.1mmol/L diuron degradation rate reached 91.3%. The sulfate free racial and hydroxyl free radical produced in system were determined by molecular probes(ethanol and tert-butanol) methods,and the reaction mechanism of Fe(Ⅱ)/S2O82-S2O32-system produced sulfate free radical was discussed.