Author: Beiyuan, Jingzi
Title: Treatment of PPCPs in aqueous solution by photo/catalyst/Fenton process
Degree: M.Sc.
Year: 2012
Subject: Sewage -- Purification.
Hong Kong Polytechnic University -- Dissertations
Department: Department of Civil and Structural Engineering
Pages: ix, 91 leaves : ill. (some col.) ; 30 cm.
Language: English
Abstract: PPCPs (Pharmaceuticals and personal care products) raised more and more consideration because of its biological activity, increasing usage and persistency in environment. It was found that traditional wastewater treatments and biodegradation are not effective to remove the PPCPs. Thus a combined process called photo/catalyst/Fenton process which is based on advanced oxidation processes (AOPs), were investigated the degradation on ibuprofen (one of the most popular drugs in the world). Effects of different parameters were studied in this work, like initial pH, irradiation wavelength, and initial concentration of ibuprofen, dosage of Fenton’s reagent and TiO₂. It was found that acidic condition was most suitable for photo/catalyst/Fenton process, which can achieve fast degradation. However, the final degradation proportion of IBP can achieve over 95%, when pH value ranges from 4 to 9. 350 nm was selected as the irradiation wavelength because it is more effective and economical. The best ratio of Fenton's reagent was found to be 1:40 ([Fe²⁺]/[H₂O₂]). Furthermore, TiO₂ dosage of 0.5 g/L reached an economic and promising removal. TOC test proved that under neutral condition, photo/catalyst/Fenton process still acted better in mineralization than photo-Fenton process. Lastly, a simple kinetic modeling was built to for finding a relationship between rate constant and other factors like pH, initial concentration of ibuprofen, dosage of Fenton’s reagent and TiO₂. On the whole, photo/catalyst/Fenton process combines the advantages of both photo-Fenton and photocatalysis, as it could degrade more ibuprofen and achieved a better mineralization in shorter time and wider pH range.
Rights: All rights reserved
Access: restricted access

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