光催化降解氧氟沙星废水的研究

Study on Photocatalytic Degradation of Ofloxacin in Wastewater

采用溶胶-凝胶法制备了不同厚度的光催化剂TiO2薄膜和掺杂银离子的TiO2薄膜(Ag^+-TiO2薄膜)。以紫外光为光源,考察了催化剂、pH值、氧氟沙星初始浓度和光照时间对降解效果的影响。研究结果表明,TiO2薄膜和Ag^+-TiO2薄膜以及其厚度对氧氟沙星的降解效果有明显影响;废水pH值的增加有利于光催化;氧氟沙星初始浓度越低,去除率越高;光照时间对TiO2薄膜和Ag^+-TiO2薄膜降解氧氟沙星效果有一定影响,但降解效率不是简单的随着光照时间的增加而增大或减小。

Photocatalyst TiO 2 films and Ag^+-TiO2 films with different thickness were prepared by sol-gel method.The effects of photocatalyst,pH value,initial Ofloxacin concentration and illumination time on degradation were investigated using UV light.The results showed that TiO2 films,Ag^+-TiO2 films and their thickness had a significant effect on the degradation of Ofloxacin.The increase of pH value of wastewater is beneficial to photocatalysis.The lower the initial concentration of Ofloxacin was,the higher the removal rate of Ofloxacin was.The illumination time had certain effect on degradation of Ofloxacin by TiO2 films and Ag^+-TiO2 films,but the degradation efficiency did not simply increase or decrease with the increase of illumination time.