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Preparation of Activated Carbon Supported TiO2 and Its Application in Catalytic Ozonation Treatment of Papermaking Wastewater
  
DOI：10.11980/j.issn.0254-508X.2011.06.008
Key Words:activated carbon supported TiO2  catalytic ozonation  removal rate
Author NameAffiliation
张贤贤 华南理工大学造纸与污染控制国家工程研究中心，华南理工大学制浆造纸工程国家重点实验室,广东广州，510640 
雷利荣 华南理工大学造纸与污染控制国家工程研究中心，华南理工大学制浆造纸工程国家重点实验室,广东广州，510640 
李友明 华南理工大学造纸与污染控制国家工程研究中心，华南理工大学制浆造纸工程国家重点实验室,广东广州，510640 
马黎明 华南理工大学造纸与污染控制国家工程研究中心，华南理工大学制浆造纸工程国家重点实验室,广东广州，510640 
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Abstract:Activated carbon (AC) supported TiO2 catalysts (TiO2/AC) were prepared by sol-gel method from Ti(OBu)4. The crystalline and morphology of TiO2/AC were characterized by XRD and SEM respectively. The removal rates of CODCr and color of the wastewater during catalytic ozonation with the presence of TiO2/AC were studied. The results indicated that anatase phase was detected after the TiO2/AC was heated at 500℃ for 3 h, and TiO2 particles distributed uniformly on the surface of activated carbon. The best degradation rate during the treatment of papermaking wastewater by TiO2/AC catalytic ozonation process was 3.38% titania loading, color and CODCr removal rates were up to 96.9% and 54.4% respectively when reaction time was 12 min. Which were increased by 12.3 units and 21.7 units compared with that of single ozonation process, and increased by 5.3 units and 14.2 units compared with the activated carbon catalytic ozonation. The CODCr removal rate of papermaking wastewater was greatly increased by TiO2/AC catalytic ozonation.
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