摘要：

本研究通过简便的水热和煅烧两步法合成了CeO₂，采用扫描电子显微镜（SEM）、X射线衍射（XRD）对CeO₂的微观形貌和晶型结构进行了表征；为提高实际制药废水深度氧化处理的效果，Oxone试剂被引入UV/CeO₂氧化体系。研究结果表明，UV辐照协同CeO₂可高效活化Oxone试剂产生SO₄ ^·-、SO₅ ^·-和·OH等多种活性氧化物质，实现制药废水深度氧化的目的；溶液pH、Oxone用量、CeO₂用量、反应温度等因素影响制药废水COD和TOC的去除效果，在制药废水初始COD为326 mg/L、TOC为132.6 mg/L、Oxone质量浓度为1.0 g/L、CeO₂质量浓度为0.6 g/L、pH为6.86、温度为30 ℃、反应时间为60 min时，UV/CeO₂耦合Oxone氧化工艺对实际制药废水COD的去除率达到90.21%，TOC去除率为76.99%。UV/CeO₂耦合Oxone氧化具有潜在的工业应用前景。

关键词: 紫外光, 二氧化铈, Oxone试剂, 制药废水

Abstract:

The ceric dioxide（CeO₂）material was synthesized by a convenient two-step method of hydrothermal and calcination processes. The micromorphology and crystal structure of CeO₂ material were characterized by scanning electron microscopy（SEM） and X-ray diffraction （XRD）. In order to improve the efficiency of advanced treatment for pharmaceutical wastewater，Oxone was also introduced into the UV/CeO₂ oxidation system. The research results showed that UV/CeO₂ could effectively activate the Oxone to produce more reactive oxidizing species，such as SO₄ ^·-，SO₅ ^·- and·OH，causing the advanced oxidation of pharmaceutical wastewater. The influencing factors on COD and TOC removal，including the solution pH，Oxone dosage，CeO₂ dosage and temperature，were discussed. The COD removal efficiency and TOC removal efficiency of pharmaceutical wastewater could reach 90.21% and 76.99% respectively，under conditions that the initial COD 326 mg/L，TOC 132.6 mg/L，Oxone dosage 1.0 g/L，CeO₂ doseage 0.6 g/L，pH 6.86，reaction temperature 30 ℃ and reaction time 60 min. UV/CeO₂ coupled Oxone oxidation had potential industrial applications.

Key words: UV, CeO₂, Oxone reagent, pharmaceutical wastewater

中图分类号: 

• X703.1