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Applications of nano-TiO_2 photocatalytic technology to the treatment of industrial wastewater

Zhang Hao,Zhu Qingming(School of Civil Engineering and Architecture,Anhui University of Technology,Maanshan 243002,China)  
Photocatalytic reaction mechanism of nano-TiO2 is introduced.The progress in the research on the application of nano-TiO2 photocatalytic technology to the degradation of wastewater containing oil stain,pesticides,dyeing,surfactant,other organic compounds and heavy metals,and wastewater from paper making is reviewed.The five factors that has limited the practical application of nano-TiO2 photocatalytic technology,such as the modification, immobility,preparation method,and application mechanism of nano-TiO2 and their negative influences on the application of nano-TiO2 are pointed out.Researchers should make continuous improvements on nano-TiO2 photocatalytic technology,so as to make its application to the treatment of industrial wastewater become broader and more effective.
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