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以Ti金属网为阴极,Ti基RuO2涂层形稳电极为阳极,采用外加H2O2和Fe2+的方式,研究了电-Fenton氧化预处理干法腈纶生产废水的工艺,考察了H2O2投加量、Fe2+投加量、pH值和电流强度等因素对污染物降解过程的影响,分析了废水可生化性和污染物变化规律。结果表明,电-Fenton法可以有效降解废水中有机污染物,使废水COD迅速降低,在初始pH值为3.0,Fe2+投加量为5.0 mmol/L,H2O2投加量为60.0 mmol/L,电流强度0.2 A的条件下,反应120 min后COD去除率可以达到44.0%以上;反应过程中H2O2的投加方式对电-Fenton法的处理效果具有明显影响,H2O2分6次投加可以使COD去除率由一次性投加时的44.8%提高至54.1%;处理后废水的BOD5/COD由0.29升高至0.68;GC-MS结果表明,经电-Fenton法预处理后,废水中多数芳香族化合物和特征污染物能被有效降解。
The process of electro-Fenton oxidation pretreatment of dry acrylic wastewater was studied by using Ti metal mesh as cathode and Ti-based RuO2 coating as stationary electrode. The effects of H2O2 dosage, Fe2 + Dosage, pH and current intensity on the degradation process of pollutants, the biodegradability of wastewater and the change rule of pollutants were analyzed. The results showed that the electro-Fenton method could effectively degrade the organic pollutants in the waste water and reduce the COD of the waste water rapidly. The initial pH was 3.0, the dosage of Fe2 + was 5.0 mmol / L, the dosage of H2O2 was 60.0 mmol / L, Under the condition of 0.2 A strength, the COD removal efficiency can reach over 44.0% after 120 min of reaction; the way of adding H2O2 during the reaction has a significant effect on the treatment effect of the electro-Fenton process, and the addition of H2O2 in six times can remove the COD The rate of BOD5 / COD was increased from 0.29 to 0.68 after treatment, from 44.8% to 54.1%. The results of GC-MS showed that most of the aromatics And characteristic contaminants can be effectively degraded.