Abstract:

Fenton pretreatment has been used for treating organic gas absorbing wastewater in spraying-painting workshop treatment. The effects of the concentrations of H₂O₂ and FeSO₄·7H₂O，pH，reaction time and other factors on the removal rate are investigated. When the reaction conditions are as follows：the dosage of H₂O₂ is around 1.4mol/L，dosage of FeSO₄·7H₂O 62.3 mmol/L，pH 7.4，and reaction time 3 h，the COD of the organic gas absorbing tail washings，whose initial COD is 40 000 -45 000 mg/L containing acetone，ethyl acetate and dimethylbenzene，can reach 78%. The results show that Fenton reagent has very good effect on the pre-treatment of wastewater.

Key words: Fenton reagent, pretreatment, organic gas, absorbing tail washings, refractory biodegradation

摘要：

根据喷涂车间有机废气吸收尾液难生物降解的特点，采用Fenton 试剂氧化预处理，考察了H₂O₂和Fe²+浓度、pH、反应时间等因素对去除效果的影响。在H₂O₂投加量为1.4 mol/L，FeSO₄·7H₂O 投量为62.3 mmol/L，pH 为7.4，反应3 h 的条件下，初始COD 为40 000~45 000 mg/L 的含丙酮、乙酸乙酯、二甲苯的有机废气吸收尾液的COD去除率可达到78%。结果表明，Fenton 试剂对该废水可以取得很好的预处理作用。

关键词: Fenton 试剂, 预处理, 有机废气, 吸收尾液, 难生物降解

CLC Number: 

• X703.1