Fenton氧化法预处理喷涂车间有机废气吸收尾液

摘要

Fenton pretreatment has been used for treating organic gas absorbing wastewater in spraying-painting workshop treatment. The effects of the concentrations of H2O2 and FeSCO4· 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 1.4 mol/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.%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3h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.