Photocatalytic Reactor Design for Elimination of Pharmaceutical Pollutants from Wastewater

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Tafrishi, Aida | 2019

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 51651 (06)
University: Sharif University of Technology
Department: Chemical and Petroleum Engineering
Advisor(s): Borghei, Mehdi; Ghasemi, Shahnaz
Abstract:
Due to the increasing number of Advanced Oxidation Processes (AOPs) that are exploited to eliminate emerging and recalcitrant contaminants from water supplies, photocatalytic degradation of Reactive Blue 21 dye using Zinc Oxide nanoparticles is investigated in both a slurry phase and an immobilized photoreactor. The structural and optical properties of the prepared ZnO nanoparticles were examined by X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and UV-Visible Diffuse Reflectance Spectroscopy (UV-vis DRS). The effects of photocatalyst concentration, calcination temperature, pH and UV lamps were optimized in the slurry phase photoreactor. It was shown that 250 ppm of ZnO that was calcined in 300˚C in a solution with adjusted pH was able to eliminate 90% of the reactive dye using a 11W UVA lamp. This information were further used to design an immobilized falling film photoreactor. The optimized photocatalysts were coated on a glass substrate by dip-coating method. The retention time in the falling film photoreactor was optimized to 5 h to reach 53% of dye elimination
Keywords:
Advanced Oxidation Process ; Immobilized Photocatalytic Reactor ; Reactive Blue Color ; Photocatalyst ; Slurry Phase Photocatalytic Reactor ; Zinc Oxide ; Diclofenac Sodium

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