中文摘要：

采用混凝-非均相Fenton氧化法对某印染厂的染色漂洗废水进行处理,在聚合硫酸铁的混凝作用和黄铁矿作催化剂的非均相Fenton的催化氧化作用下,废水中的污染物得到有效去除。考察了混凝剂投加量、混凝初始pH值、H2O2投加量、氧化初始pH值、黄铁矿投加量及黄铁矿的重复利用等因素对污染物降低效果的影响,研究了黄铁矿催化氧化过程中铁离子形态和浓度变化过程。结果表明,在混凝剂投加量为120 mg/L、混凝初始pH值为7、H2O2投加量为0.12 m L/L、氧化初始pH值为3、黄铁矿投加量为2.5 g/L、氧化反应时间为1 h的条件下,CODCr总去除率达81%,TOC总去除率达67%。黄铁矿重复利用性能良好,具有很好的工程应用性。

英文摘要：

Using coagulation-heterogeneous Fenton oxidation process to treat cloth washing and dyeing wastewater from a printing and dyeing mill, the pollutants could be effectively removed through the coagulation and heterogenous Fenton catalytic oxidation with polymeric ferric sulfate as the coagulant and pyrite as the catalyst. The influences of dosage of coagulant, H2O2 and pyrite, initial pH values of the coagulation and oxidation, reuse performance of pyrite, and some other factors on pollutants removal were investigated;besides, the variation of iron ions forms and concentrations during the pyrite catalytic oxidation was studied as well. The results showed that, under the condition that the dosage of coagulant, H2O2 and pyrite were 120 mg/L, 0.12 mL/L, and 2.5 g/L respectively, the initial pH values of the coagulation and oxidation were 7 and 3 respectively, the oxidation time was 1 h, the total removal rates of CODCr and TOC reached 81% and 67% respectively. It also pointed out that, as pyrite performed a good reusability, it may have potential as a catalyst of heterogeneous Fenton oxidation in practical application.