UV/H_2O_2法降解水中阴离子表面活性剂

Study on Degradation of Anionic Surfactant in Wastewater by UV/H_2O_2 Oxidation Process

目的研究UV/H2O2(光催化氧化)法对水体中的阴离子表面活性剂的降解效果.方法以十二烷基苯磺酸钠(SDBS)溶液为模型污水,通过静态试验研究H2O2投加量、初始质量浓度、pH值、反应时间等对UV/H2O2光催化氧化降解水体中SDBS效果的影响.结果改变反应体系的H2O2投加量及pH值对氧化降解SDBS的效果影响很大,在水中SDBS初始质量浓度为100 mg/L时,控制反应条件为pH值6.5,加4 mL的H2O2,反应1h后,SDBS降解率可达80%以上.结论UV/H2O2法能够有效降解水中的SDBS,H2O2投加量低,无二次污染.

Through static experiment, with SDBS solutions as model environmental liquid, the paper studied the degradation effect of anionic surfactant in water by UV/H2O2 oxidation process. The experimental resuits show that UV/H2O2 method could effectively degrade the anionic surfactant wastewater without producing new pollutant. The reaction was influenced by a series of factors, such as the original concentration of solution, H2O2 addition, pH value and the reaction time. Under the selected condition, the efficiency would be obvious：The removal rate of SDBS can be over 80% when the initial concentration was 100mg/L; the amount of H2O2 was 4.0mL;pH value was 6.5 and the reaction time was 1 h.