Repository logo
 
Publication

Immobilised cerium-doped Zinc oxide as a photocatalyst for the degradation of antibiotics and the inactivation of antibiotic-resistant bacteria

2019Journal article Open access
Simple item page
dc.contributor.authorZammit, Ian
dc.contributor.authorVaiano, Vincenzo
dc.contributor.authorRibeiro, Ana R.
dc.contributor.authorSilva, Adrián M. T.
dc.contributor.authorManaia, Célia M.
dc.contributor.authorRizzo, Luigi
dc.date.accessioned2019-10-17T16:35:29Z
dc.date.available2019-10-17T16:35:29Z
dc.date.issued2019
dc.description.abstractThe threat of antibiotic resistance to the wellbeing of societies is well established. Urban wastewater treatment plants (UWTPs) are recognised sources for antibiotic resistance dissemination in the environment. Herein a novel cerium-doped zinc oxide (Ce-ZnO) photocatalyst is compared to ZnO and the benchmark TiO2-P25 in the immobilised form on a metallic support, to evaluate a photocatalytic process as a possible tertiary treatment in UWTPs. The catalysts were compared for the removal of two antibiotics, trimethoprim (TMP) and sulfamethoxazole (SMX), and for the inactivation of Escherichia coli (E. coli) strain DH5-Alpha in isotonic sodium chloride solution and of autochthonous bacteria in real secondary wastewater. In real wastewater, E. coli and other coliforms were monitored, as well as the respective fractions resistant to ofloxacin and azithromycin. In parallel, Pseudomonas aeruginosa and the respective sub-population resistant to ofloxacin or ciprofloxacin were also monitored. Photocatalysis with both ZnO and Ce-ZnO was faster than using TiO2-P25 at degrading the antibiotics, with Ce-ZnO the fastest against SMX but slower than undoped ZnO in the removal of TMP. Ce-ZnO catalyst reuse in the immobilised form produced somewhat slower kinetics maintained >50% of the initial activity, even after five cycles of use. Approximately 3 log10 inactivation of E. coli in isotonic sodium chloride water was recorded with reproducible results. In the removal of autochthonous bacteria in real wastewater, Ce-ZnO performed better (more than 2 log values higher) than TiO2-P25. In all cases, E. coli and other coliforms, including their resistant subpopulations, were inactivated at a higher rate than P. aeruginosa. With short reaction times no evidence for enrichment of resistance was observed, yet with extended reaction times low levels of bacterial loads were not further inactivated. Overall, Ce-ZnO is an easy and cheap photocatalyst to produce and immobilise and the one that showed higher activity than the industry standard TiO2-P25 against the tested antibiotics and bacteria, including antibiotic-resistant bacteria.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationZammit, I., Vaiano, V., Ribeiro, A., Silva, A., Manaia, C., & Rizzo, L. (2019). Immobilised Cerium-Doped Zinc Oxide as a Photocatalyst for the Degradation of Antibiotics and the Inactivation of Antibiotic-Resistant Bacteria. Catalysts, 9(3), 222. https://doi.org/10.3390/catal9030222pt_PT
dc.identifier.doi10.3390/catal9030222pt_PT
dc.identifier.eid85064659314
dc.identifier.issn2073-4344
dc.identifier.urihttp://hdl.handle.net/10400.14/28416
dc.identifier.wos000465012800016
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherMDPIpt_PT
dc.relation675530
dc.relationLaboratory of Separation and Reaction Engineering
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectAntibiotic resistancept_PT
dc.subjectImmobilised photocatalystpt_PT
dc.subjectPhotocatalysispt_PT
dc.subjectTertiary treatmentpt_PT
dc.subjectWastewater disinfectionpt_PT
dc.titleImmobilised cerium-doped Zinc oxide as a photocatalyst for the degradation of antibiotics and the inactivation of antibiotic-resistant bacteriapt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleLaboratory of Separation and Reaction Engineering
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FEQU%2F50020%2F2019/PT
oaire.citation.issue3
oaire.citation.titleCatalystspt_PT
oaire.citation.volume9
oaire.fundingStream6817 - DCRRNI ID
person.familyNameZammit
person.familyNameSilva
person.familyNameManaia
person.familyNameRizzo
person.givenNameIan
person.givenNameAdrián
person.givenNameCélia
person.givenNameLuigi
person.identifier.ciencia-id1F1D-4392-B50F
person.identifier.ciencia-idC31F-553B-6365
person.identifier.orcid0000-0002-9768-6592
person.identifier.orcid0000-0001-8551-6353
person.identifier.orcid0000-0002-3674-1789
person.identifier.orcid0000-0003-1449-9116
person.identifier.ridJ-3346-2013
person.identifier.ridA-6286-2008
person.identifier.scopus-author-id56964271200
person.identifier.scopus-author-id56329177700
person.identifier.scopus-author-id6602465318
person.identifier.scopus-author-id9044416100
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicationf29cc55a-415f-4990-a590-c261ca3b31e4
relation.isAuthorOfPublicationd58964c4-acaf-41ea-ba37-78a2731b7cde
relation.isAuthorOfPublicationa5f14577-0aed-4046-97da-5f4216c7aa07
relation.isAuthorOfPublicationc1ca67d7-0f5e-4499-8017-f9b6442d5b7a
relation.isAuthorOfPublication.latestForDiscoveryc1ca67d7-0f5e-4499-8017-f9b6442d5b7a
relation.isProjectOfPublication7bdbd4bd-8763-4eaa-bf3e-2882c2f748e1
relation.isProjectOfPublication.latestForDiscovery7bdbd4bd-8763-4eaa-bf3e-2882c2f748e1

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
19527755.pdf
Size:
2.91 MB
Format:
Adobe Portable Document Format
Download

Collections

CBQF - Contribuições em Revistas Científicas / Contribution to Journals