| Author: | Jin, Qiutong |
| Title: | Degradation of sulfadiazine with advance oxidation process based on ozone |
| Degree: | M.Sc. |
| Year: | 2018 |
| Subject: | Hong Kong Polytechnic University -- Dissertations Water -- Purification Antibiotics -- Environmental aspects |
| Department: | Faculty of Construction and Environment |
| Pages: | 6, 72 pages : color illustrations |
| Language: | English |
| Abstract: | Antibiotics are widely used in the prevention and treatment of human and animal diseases as well as in farming and agriculture. However, due to unreasonable use, the presence of antibiotics is constantly detected in environmental media, especially in water environments. Because antibiotics pose potential hazards to humans and the ecological environment, it is necessary to study efficient and economical techniques for removing antibiotics from water. In this paper, sole ozone, sole persulfate (PS), sole peroxymonosulfate (PMS), ozone/PS system and ozone/PMS system have been operated to degrade the degradation efficiency of typical antibiotic sulfadiazine (SDZ) in DDW water and effluent. Based on the research and comparison, the effects of key factors on the degradation rate of sulfadiazine were investigated. After 20 minutes of reaction, O3 can effectively remove sulfadiazine in water, and the PS process is not ideal for the removal of sulfadiazine. Increasing the concentration of gaseous ozone or increasing the concentration of PS increases the rate of degradation of sulfadiazine will be promoted; increasing the initial concentration of sulfadiazine will reduces the rate of degradation. The pH of the solution can influence the degradation rate of the sulfadiazine in ozone/PS system (the higher pH value result in higher degradation rate). While, the pH value has no significant effect on ozone/PMS system. This phenomenon may cause by two aspects, On the one hand, the pH value changes the mode of action of ozone and sulfadiazine; On the other hand, the increase of pH value makes the accelerate of ozone decomposes to produce ·OH. As a typical advanced oxidation process, the UV/O3 process not only can remove sulfadiazine in water more efficiently,but also reflects the synergy between the two. Besides, according to the experiment in effluent, we also find that some anion in the effluent will promote or inhabitant the ozone/PS system and ozone/PMS system. It might because these anions influence the process of the produce of ·OH. Then same concentration of different anions have been added to investigate the effect of degradation, the result shows Br- have a great performance on SFD removal, caused the generated of HOBr/OBr-. |
| Rights: | All rights reserved |
| Access: | restricted access |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 991022244146103411.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 1.76 MB | Adobe PDF | View/Open |
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