Fenton氧化法处理偶氮染料丽春红2R废水的研究

THE DEGRADATION STUDY OF PONCEAU 2R AZO DYE WASTEWATER USING FENTON OXIDATION

采用Fenton氧化法处理偶氮染料丽春红2R模拟废水,研究不同因素对丽春红2R模拟废水的降解效果。结果显示,p H=3.0、H2O2浓度为2 mmol/L、c(Fe2+)/c(H2O2)=1∶5条件下,Fenton氧化法对丽春红2R模拟废水反应体系的降解效果最佳。此外,在室温(30℃)和p H=3.0条件下,模拟出Fenton氧化降解丽春红2R的初始动力学方程为R=dm/dt=0.00198[c(Ponceau2R)]0.7234[c(Fe2+)]0.5297[c(H2O2)]0.3574。通过LC-MS图对Fenton氧化降解丽春红2R过程中间产物的分析,从而推断出该染料氧化降解的路径。

Fenton oxidation was employed to deal with the wastewater containing ponceau 2R azo dyes. Different impact factors were investigated to evaluate their influence on the degradation of ponceau 2R azo dyes. The results showed that,the optimal performance can be obtained with pH = 3. 0,the concentration of H2O2= 2 mmol / L and the ratio of Fe^2＋/ H2O2= 1 ∶ 5.Additionally,the initial degradation kinetic equation of ponceau 2R azo dyes（ R = dm / dt = 0. 00198[c（ ponceau 2R） ]^0. 7234·[c（ Fe^2＋]^0. 5297[c（ H2O2） ]^0. 3574） with room temperature（ 30 ℃） and pH = 3. 0,can be fitted through the analysis of experimental data. At last,the degradation pathway of ponceau 2R was explored with UV-Vis and LC-MS measurements.