Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor | Department of Civil and Environmental Engineering | en_US |
| dc.contributor.advisor | Chu, Wei (CEE) | en_US |
| dc.creator | Xiao, Fanjie | - |
| dc.identifier.uri | https://theses.lib.polyu.edu.hk/handle/200/10865 | - |
| dc.language | English | en_US |
| dc.publisher | Hong Kong Polytechnic University | en_US |
| dc.rights | All rights reserved | en_US |
| dc.title | Degradation of antipyrine by peroxymonosulfate activated with nano zero-valent iron | en_US |
| dcterms.abstract | In this work, nano zero-valent iron (nZVI) was employed to activate peroxymonosulfate (PMS) for the degradation of antipyrine (AP). First, effects of the influencing parameters on AP degradation (i.e. initial pH, commonly-existing anions and dosage of nZVI, AP, PMS) were evaluated. A 90% AP removal efficiency was achieved during 5 min under the conditions of [AP]=0.11mM, nZVI=0.01g/L, [PMS]=1.6mM. For the effects of anions, carbonate ions exhibited significant inhibitory effect on AP removal and phosphate ions also inhibited the process but in a relatively low degree. Low concentration of chloride ions (≤10mM) performed unobvious effects on AP degradation, while the higher concentration (100mM) increased the removal efficiency largely due to the generation of Cl2 -• and ClOH-• which could not be quenched by methanol. Then, reusability of nZVI was examined through four cycles and the results was acceptable in three runs (88% AP removal). The scavenging experiments indicated that sulfate radical contributed to the degradation of AP more compared to hydroxyl radical. The TOC removal efficiency of AP removal in PMS/nZVI system was also tested, in which 52% of TOC was removed within 480 min reaction under the conditions of [AP]=0.66mM, [PMS]=4.8mM, nZVI=0.2g/L. Finally, intermediates of AP degradation were determined and reaction pathways of AP degradation was proposed. | en_US |
| dcterms.extent | v, 48 pages : illustrations | en_US |
| dcterms.isPartOf | PolyU Electronic Theses | en_US |
| dcterms.issued | 2020 | en_US |
| dcterms.educationalLevel | M.Sc. | en_US |
| dcterms.educationalLevel | All Master | en_US |
| dcterms.LCSH | Antipyrine | en_US |
| dcterms.LCSH | Organic water pollutants -- Environmental aspects | en_US |
| dcterms.LCSH | Water -- Purification | en_US |
| dcterms.LCSH | Nanostructured materials | en_US |
| dcterms.LCSH | Hong Kong Polytechnic University -- Dissertations | en_US |
| dcterms.accessRights | restricted access | en_US |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 5363.pdf | For All Users (off-campus access for PolyU Staff & Students only) | 1.68 MB | Adobe PDF | View/Open |
Copyright Undertaking
As a bona fide Library user, I declare that:
- I will abide by the rules and legal ordinances governing copyright regarding the use of the Database.
- I will use the Database for the purpose of my research or private study only and not for circulation or further reproduction or any other purpose.
- I agree to indemnify and hold the University harmless from and against any loss, damage, cost, liability or expenses arising from copyright infringement or unauthorized usage.
By downloading any item(s) listed above, you acknowledge that you have read and understood the copyright undertaking as stated above, and agree to be bound by all of its terms.
Please use this identifier to cite or link to this item:
https://theses.lib.polyu.edu.hk/handle/200/10865