[目的]寻求一种有效降解含有机磷农药废水的方法.[方法]研究了Fenton 反应的反应时间、pH值、H_2O_2与Fe~(2+)浓度对降解率的影响,同时考察了光和超声波对反应的促进作用.[结果]对于125 mg/L的乐果溶液,在温度60 ℃,溶液pH值为3,H2O2加入量为5 mmol/L ,FeSO_4·7H_2O加入量为0.3 g条件下,30 min内降解率可达100%,延长反应时间为8 h,COD去除率可达100%.光与超声波对Fenton 试剂有很强的协同催化作用,3 h内COD去除率可达90%.[结论]Fenton 试剂可使有机磷农药有效降解.%[ Objective] The aim of the study was to seek a good method for the degradation of organophosphorus pesticide wastewater containing dimethoate . [ Method] The influence of reation time, pH value, the concentration of H_2O_2 and Fe~(2+) on degradation efficiency of Fenton reaction were analyzed, and the stimulating effects of photo and ultrasonic on Fenton reaction were also researched. [ Result ] Under the condition of 60℃ , pH3, H_2O_2 5 mmol/L, the addition of FeSO_4·7H_2O 0. 3 g, the degradation efficiency was 100% within 30 min, the COD removal efficiency could reach 100% in 8h. Furthermore , photo and ultrasonic could enhance the degradation ability of Fenton reagent , under the same condition ,the COD removal efficiency could be 90% within 3 h. [Conclusion] Fenton reagent can be applied in the efficient degradation of organophosphorus pesticide wastewater containing dimethoate.
展开▼
