The phosphate pesticide waste water was pretreated with Fenton agent and the influences of factors including input amount of H2O2, [Fe2+]/[H2O2],initial pH value,reaction time on the removal rate of COD from waste water were investigated through single factor experiments and orthogonal test.The results showed that the reaction in pretreatment of methamidophos-simulated waste water with Fenton agent accorded with first-order reaction model; the optimized condition was as follows:the input amount of H2O2 was ...