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Experimental Studies on Photocatalytic Removal of Dye Using Titanium Dioxide and Zinc Oxide Nanoparticles

Dehabadi, Monireh | 2011

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 42542 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Kariminia, Hamid Reza; Vossoughi, Manoochehr
  7. Abstract:
  8. Textile industry wastewaters are one of the important sources of environmental contamination because they produce large quantities of highly colored effluents. In recent years, use of advanced oxidation processes by producing highly active and reactive components such as hydroxyl radicals has been proposed. In this study, two oxygenated photocatalytic systems including UV/ZnO and UV/TiO2 were examined for degradation of C.I. reactive orange 16 dye as a typical organic pollutant in textile effluents. A thin gap annular photoreactor was designed and applied for the experiments. The photoreactor provided large surface area exposed to UV light, where in the solution layer renewal on the UV source surface, resulted in higher photocatalytic degradation. Effect of different parameters including initial dye concentration, pH and temperature were investigated and their optimal values were obtained using response surface methodology. Experimental results revealed that at the optimum conditions, maximum dye degradations of 70% and 97% were achieved in UV/TiO2 and UV/ZnO systems, respectively. COD analysis - as the pollution index- showed 68.5 percent of dye molecule destruction
  9. Keywords:
  10. Titanium Dioxide ; Zinc Oxide ; Response Surface Methodology ; Advanced Oxidation Process ; Photocatalyst ; Reactive Orange 16

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