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Article: Biodegradation and adsorption of antibiotics in the activated sludge process

TitleBiodegradation and adsorption of antibiotics in the activated sludge process
Authors
Issue Date2010
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/est
Citation
Environmental Science And Technology, 2010, v. 44 n. 9, p. 3468-3473 How to Cite?
AbstractThe removal of 11 antibiotics of 6 classes, that is, two β-lactams (ampicillin and cefalexin), two sulfonamides (sulfamethoxazole and sulfadiazine), three fluoroquinolones (norfloxacin, ofloxacin, and ciprofloxacin), one tetracyclines (tetracycline), two macorlides (roxithromycin and anhydro-erythromycin), and one others (trimethoprim), in activated sludge process was investigated using two series of batch reactors treating freshwater and saline sewage respectively. At environmental relevant concentrations tested in this study, biodegradation and adsorption were the major removal routes for the target antibiotics, where volatilization and hydrolysis were neglectable. Among the 11 target antibiotics, cefalexin and the two sulfonamides were predominantly removed by biodegradation in both freshwater and saline sewage systems. Ampicillin, norfloxacin, ciprofloxacin, ofloxacin, tetracycline, roxithromycin, and trimethoprim were mainly removed by adsorption. Divalent cations (Ca2+ and Mg2+) in saline sewage significantly decreased the adsorption of the three fluoroquinolones onto activated sludge. These three fluoroquinolones also exhibited certain biodegradability in the saline activated sludge reactor. Erythromycin-H2O was persistent in both saline and freshwater systems under the experimental conditions and could not be removed at all. Kinetics study showed that biodegradation of cefalexin, the two sulfonamides and the three fluoroquinolones followed first-order model well (R2: 0.921-0.997) with the rate constants ranging from 5.2 Å - 10-3 to 3.6 Å - 10-1 h-1. © 2010 American Chemical Society.
Persistent Identifierhttp://hdl.handle.net/10722/124540
ISSN
2015 Impact Factor: 5.393
2015 SCImago Journal Rankings: 2.664
ISI Accession Number ID
Funding AgencyGrant Number
Hong Kong General Research FundHKU7202/09E
University of Hong Kong
Funding Information:

We thank the Hong Kong General Research Fund (HKU7202/09E) for the financial support of this study, and B. Li thanks The University of Hong Kong for the postgraduate studentship.

References

 

DC FieldValueLanguage
dc.contributor.authorLi, Ben_HK
dc.contributor.authorZhang, Ten_HK
dc.date.accessioned2010-10-31T10:40:18Z-
dc.date.available2010-10-31T10:40:18Z-
dc.date.issued2010en_HK
dc.identifier.citationEnvironmental Science And Technology, 2010, v. 44 n. 9, p. 3468-3473en_HK
dc.identifier.issn0013-936Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/124540-
dc.description.abstractThe removal of 11 antibiotics of 6 classes, that is, two β-lactams (ampicillin and cefalexin), two sulfonamides (sulfamethoxazole and sulfadiazine), three fluoroquinolones (norfloxacin, ofloxacin, and ciprofloxacin), one tetracyclines (tetracycline), two macorlides (roxithromycin and anhydro-erythromycin), and one others (trimethoprim), in activated sludge process was investigated using two series of batch reactors treating freshwater and saline sewage respectively. At environmental relevant concentrations tested in this study, biodegradation and adsorption were the major removal routes for the target antibiotics, where volatilization and hydrolysis were neglectable. Among the 11 target antibiotics, cefalexin and the two sulfonamides were predominantly removed by biodegradation in both freshwater and saline sewage systems. Ampicillin, norfloxacin, ciprofloxacin, ofloxacin, tetracycline, roxithromycin, and trimethoprim were mainly removed by adsorption. Divalent cations (Ca2+ and Mg2+) in saline sewage significantly decreased the adsorption of the three fluoroquinolones onto activated sludge. These three fluoroquinolones also exhibited certain biodegradability in the saline activated sludge reactor. Erythromycin-H2O was persistent in both saline and freshwater systems under the experimental conditions and could not be removed at all. Kinetics study showed that biodegradation of cefalexin, the two sulfonamides and the three fluoroquinolones followed first-order model well (R2: 0.921-0.997) with the rate constants ranging from 5.2 Å - 10-3 to 3.6 Å - 10-1 h-1. © 2010 American Chemical Society.en_HK
dc.languageengen_HK
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/esten_HK
dc.relation.ispartofEnvironmental Science and Technologyen_HK
dc.subject.meshAdsorption-
dc.subject.meshAnti-Bacterial Agents - chemistry-
dc.subject.meshBiodegradation, Environmental-
dc.subject.meshCations-
dc.subject.meshFluoroquinolones - chemistry-
dc.titleBiodegradation and adsorption of antibiotics in the activated sludge processen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0013-936X&volume=44&issue=9&spage=3468–3473&epage=&date=2010&atitle=Biodegradation+and+adsorption+of+antibiotics+in+the+activated+sludge+processen_HK
dc.identifier.emailZhang, T:zhangt@hkucc.hku.hken_HK
dc.identifier.authorityZhang, T=rp00211en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/es903490hen_HK
dc.identifier.pmid20384353-
dc.identifier.scopuseid_2-s2.0-77951818480en_HK
dc.identifier.hkuros175529en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-77951818480&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume44en_HK
dc.identifier.issue9en_HK
dc.identifier.spage3468en_HK
dc.identifier.epage3473en_HK
dc.identifier.eissn1520-5851-
dc.identifier.isiWOS:000277067000045-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridLi, B=36072052100en_HK
dc.identifier.scopusauthoridZhang, T=24470677400en_HK

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