Fe^(2+)/HClO处理乐果废水的研究

Study of Treating Dimethoate-containing Wastewater with Fe^(2+)/HClO

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 H_2O_2,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 FeSO_4·7H_2O 的投加量分别为10 mL/L 和2.5 g/L、振荡氧化30 min 的条件下,对初始浓度小于20 mg/L 的乐果废水,去除率大于90%,剩余乐果的浓度小于2 mg/L,达到了我国废水综合排放的三级标准。

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.