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- Publisher Website: 10.1016/j.watres.2012.04.018
- Scopus: eid_2-s2.0-84861336214
- PMID: 22575156
- WOS: WOS:000304850600026
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Article: pH significantly affects removal of trace antibiotics in chlorination of municipal wastewater
Title | pH significantly affects removal of trace antibiotics in chlorination of municipal wastewater |
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Authors | |
Keywords | Antibiotics Free available chlorine Kinetics Sewage treatment plant |
Issue Date | 2012 |
Publisher | Pergamon. The Journal's web site is located at http://www.elsevier.com/locate/watres |
Citation | Water Research, 2012, v. 46 n. 11, p. 3703-3713 How to Cite? |
Abstract | The effect of pH on chlorination behaviors of 12 antibiotics, including β-lactams, sulfonamides, fluoroquinolones, tetracyclines, macrolides, and others at environmentally relevant concentrations was systematically examined in the effluent matrix of activated sludge process. The removal of most antibiotics (except cefalexin and tetracycline) significantly depended on pH in the range of 5.5-8.5. The elimination rates of ciprofloxacin, norfloxacin, anhydro-erythromycin, and roxithromycin increased while that of sulfamethoxazole decreased significantly with the increase of pH. Sulfadiazine, ofloxacin, and trimethoprim exhibited the highest reactivity with free available chlorine under the pH of 6-7, 7, and 7.5, respectively. Not only the free available chlorine species (HOCl and OCl⁻), but also the antibiotics species (cationic, neutral and anionic) affected the overall reaction rate. Anionic antibiotic species are usually much more reactive (1-3 orders of magnitude greater) than cationic antibiotic species toward free available chlorine. Although OCl⁻ is a weaker oxidant than HOCl, chlorination of sulfadiazine, sulfamethoxazole, ciprofloxacin, norfloxacin, and trimethoprim with OCl⁻ became significant at pH > 7.5. The observed kinetics rate constants calculated from species-specific rate constants could accurately (0.91 < R² < 0.99) predict the antibiotic removal in chlorination of activated sludge effluent with similar DOC and ammonia concentration to this study at a given pH value. |
Persistent Identifier | http://hdl.handle.net/10722/163859 |
ISSN | 2023 Impact Factor: 11.4 2023 SCImago Journal Rankings: 3.596 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Li, B | - |
dc.contributor.author | Zhang, T | - |
dc.date.accessioned | 2012-09-20T07:52:35Z | - |
dc.date.available | 2012-09-20T07:52:35Z | - |
dc.date.issued | 2012 | - |
dc.identifier.citation | Water Research, 2012, v. 46 n. 11, p. 3703-3713 | - |
dc.identifier.issn | 0043-1354 | - |
dc.identifier.uri | http://hdl.handle.net/10722/163859 | - |
dc.description.abstract | The effect of pH on chlorination behaviors of 12 antibiotics, including β-lactams, sulfonamides, fluoroquinolones, tetracyclines, macrolides, and others at environmentally relevant concentrations was systematically examined in the effluent matrix of activated sludge process. The removal of most antibiotics (except cefalexin and tetracycline) significantly depended on pH in the range of 5.5-8.5. The elimination rates of ciprofloxacin, norfloxacin, anhydro-erythromycin, and roxithromycin increased while that of sulfamethoxazole decreased significantly with the increase of pH. Sulfadiazine, ofloxacin, and trimethoprim exhibited the highest reactivity with free available chlorine under the pH of 6-7, 7, and 7.5, respectively. Not only the free available chlorine species (HOCl and OCl⁻), but also the antibiotics species (cationic, neutral and anionic) affected the overall reaction rate. Anionic antibiotic species are usually much more reactive (1-3 orders of magnitude greater) than cationic antibiotic species toward free available chlorine. Although OCl⁻ is a weaker oxidant than HOCl, chlorination of sulfadiazine, sulfamethoxazole, ciprofloxacin, norfloxacin, and trimethoprim with OCl⁻ became significant at pH > 7.5. The observed kinetics rate constants calculated from species-specific rate constants could accurately (0.91 < R² < 0.99) predict the antibiotic removal in chlorination of activated sludge effluent with similar DOC and ammonia concentration to this study at a given pH value. | - |
dc.language | eng | - |
dc.publisher | Pergamon. The Journal's web site is located at http://www.elsevier.com/locate/watres | - |
dc.relation.ispartof | Water Research | - |
dc.subject | Antibiotics | - |
dc.subject | Free available chlorine | - |
dc.subject | Kinetics | - |
dc.subject | Sewage treatment plant | - |
dc.title | pH significantly affects removal of trace antibiotics in chlorination of municipal wastewater | - |
dc.type | Article | - |
dc.identifier.openurl | http://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1879-2448 (Electronic) 0043-1354 (Linkin&volume=46&issue=11&spage=3703&epage=13&date=2012&atitle=pH+significantly+affects+removal+of+trace+antibiotics+in+chlorination+of+municipal+wastewater | en_US |
dc.identifier.email | Li, B: libing@hku.hk | - |
dc.identifier.email | Zhang, T: zhangt@hkucc.hku.hk | - |
dc.identifier.authority | Zhang, T=rp00211 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/j.watres.2012.04.018 | - |
dc.identifier.pmid | 22575156 | - |
dc.identifier.scopus | eid_2-s2.0-84861336214 | - |
dc.identifier.hkuros | 208081 | - |
dc.identifier.volume | 46 | - |
dc.identifier.issue | 11 | - |
dc.identifier.spage | 3703 | - |
dc.identifier.epage | 3713 | - |
dc.identifier.isi | WOS:000304850600026 | - |
dc.publisher.place | United Kingdom | - |
dc.identifier.citeulike | 10696219 | - |
dc.identifier.issnl | 0043-1354 | - |