Fe^2＋／HClO处理乐果废水的研究

利用次氯酸钠在酸性条件下生成的次氯酸代替Fenton试剂中的氧化剂H2O2，与Fe^2＋共同作用对乐果模拟废水进行氧化处理。研究结果表明，此方法处理乐果废水的效果明显，在pH值为2、NaClO与FeSO4·7H2O的投加量分别为10mL／L和2．5g／L、振荡氧化30min的条件下，对初始浓度小于20mg／L的乐果废水，去除率大于90％，剩余乐果的浓度小于2mg／L，达到了我国废水综合排放的三级标准。

Study of Treating Dimethoate-containing Wastewater with Fe2+/HClO

The dimethoate -containing wastewater was treated with Fe^2＋ and HClO made from NaClO in acidic solution and replacing H2O2 in the fenton reagent. The results showed that the method had good effect on treating dimethoate -containing wastewater. The best treating conditions were as follows： pH was 2, shaking time was 30 min, the dosage of FeSO4 ·7H2O and NaClO were 2.5 g/L and 10 mL/L respectively. When the original concentration of dimethoate- containing wastewater was lower than 20 rag/L, the removal rate of dimethoate was higher than 90% and the remaining content of dimethoate in the wastewater was smaller than 2 mg/L, which had reached the third grade national standard of synthetically wastewater discharging.