超声波-Fenton法协同降解含表面活性剂SDS弱酸艳红染料废水的研究

采用Fenton氧化、超声辐射和超声-Fenton氧化三种方法处理含阴离子表面活性剂SDS的弱酸艳红B染料废水,考察溶液初始pH、H2O2投加量、FeSO4投加量、反应时间和超声功率对废水色度和COD的影响。结果表明:单独超声对废水色度和COD的去除没有效果,超声-Fenton氧化法对废水COD的去除效果明显优于Fenton氧化法。在pH 2.5,温度50℃,H2O2投加量4 mL/L,FeSO4投加量300 mg/L,反应时间90 min及超声功率400 W的条件下,废水色度去除率为98%,COD去除率为72%,比单独Fenton氧化法COD去除率提高25%。

Treatment of the Weak Acid Brilliant Red B Dyes Wastewater with Surfactant SDS by Ultrasonic and Fenton Oxidation

The weak acid brilliant red B dye wastewater which contains the anionic surfactant SDS was treaded by Fenton oxidation, ultrasonic degradation and US- Fenton oxidation. The effects of initial pH value, dosage of H2O2 and FeSO4, reaction time and ultrasonic power on color and COD removal rate were investigated. The results indicated： Ultrasonic degradation had no effect on the removal of color and COD of wastewater. Compared with Fenton oxidation, ultrasound-Fenton oxidation can increase the removal rate of COD significantly. When initial pH value was 2.5, the reaction temperature was 50 ℃, dosage of 30 % H2O2 and FeSO4 were 4 mL/L and 300 mg/L, the reaction time was 90 min and the ultrasonic power was 400 W, the color removal ratio was 98 %, the COD removal ratio of COD was 72 % which was more than 25% better than that by only using Fenton oxidation.