| Author: | Tan, Yan |
| Title: | Photocatalytic degradation of ibuprofen by UV/Fe3O4/TiO2 process |
| Advisors: | Chu, Wei (CEE) |
| Degree: | M.Sc. |
| Year: | 2016 |
| Subject: | Hong Kong Polytechnic University -- Dissertations Water -- Purification -- Oxidation Water -- Purification -- Photocatalysis |
| Department: | Faculty of Construction and Environment |
| Pages: | vii, 32 pages : illustrations |
| Language: | English |
| Abstract: | In recent years, pharmaceuticals have become a group of emerging contaminants. As a typical and widely-used bacteriostatic antimicrobial drug, sulfamethoxazale (SMX) has been detected in various kinds of waters in recent years. Traditional biological treatment technologies cannot remove SMX effectively. Developing effective methods to degrade sulfamethoxazale has become a hot research area. A new type of advance oxidation process (AOPs) based on SO₄-· can mineralize persistent organic pollutants (POPs) or improve the biodegradability of POPs through oxidation, one of which is persulfate or peroxymonosulfate (PMS) catalyzed by transition metal ions or transition metal oxide to generate SO₄-. The mild reaction, no energy consumption and low cost make it an ideal water treatment process. Ferrate (VI) is a green chemical and the application in wastewater treatment has attracted more and more interests nowadays. Sulfate radicals (SO₄-·) - based oxidation combined with ferrate (VI) technologies under the irradiation of UV shows great removal efficiency in terms of SMX degradation. After 30 min, 0.05mM SMX was eliminated completely with the addition of 0.5 mM Oxone and potassium ferrate (VI). The process of Fe⁶⁺ activated peroxymonosulfate was optimized as well. The optimal pH was found to be 3. SMX degradation rate increased with the enhancement of Fe⁶⁺ dose from 0.1 to 0.5 mM. The optimum concentration of Oxone was observed to be 0.5 mM with Fe⁶⁺ dose of 0.5 mM. The experimental results also show that the TOC removal efficiency which decreased to 35% in the end of reaction under optimum parameters. |
| Rights: | All rights reserved |
| Access: | restricted access |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 991021954144303411.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 1.29 MB | Adobe PDF | View/Open |
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