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Photocatalytic ozonation of urban wastewater and surface water using immobilized TiO2 with LEDs: Micropollutants, antibiotic resistance genes and estrogenic activity

2016Journal article Open access
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dc.contributor.authorMoreira, Nuno F.F.
dc.contributor.authorSousa, José M.
dc.contributor.authorMacedo, Gonçalo
dc.contributor.authorRibeiro, Ana R.
dc.contributor.authorBarreiros, Luisa
dc.contributor.authorPedrosa, Marta
dc.contributor.authorFaria, Joaquim L.
dc.contributor.authorPereira, M. Fernando R.
dc.contributor.authorCastro-Silva, Sérgio
dc.contributor.authorSegundo, Marcela A.
dc.contributor.authorManaia, Célia M.
dc.contributor.authorNunes, Olga C.
dc.contributor.authorSilva, Adrián M.T.
dc.date.accessioned2017-10-13T19:16:42Z
dc.date.available2017-10-13T19:16:42Z
dc.date.issued2016
dc.description.abstractPhotocatalytic ozonation was employed for the first time in continuous mode with TiO2-coated glass Raschig rings and light emitting diodes (LEDs) to treat urban wastewater as well as surface water collected from the supply area of a drinking water treatment plant (DWTP). Different levels of contamination and types of contaminants were considered in this work, including chemical priority substances (PSs) and contaminants of emerging concern (CECs), as well as potential human opportunistic antibiotic resistant bacteria and their genes (ARB&ARG). Photocatalytic ozonation was more effective than single ozonation (or even than TiO2 catalytic ozonation) in the degradation of typical reaction by-products (such as oxalic acid), and more effective than photocatalysis to remove the parent micropollutants determined in urban wastewater. In fact, only fluoxetine, clarithromycin, erythromycin and 17-alpha-ethinylestradiol (EE2) were detected after photocatalytic ozonation, by using solid-phase extraction (SPE) pre-concentration and LC-MS/MS analysis. In surface water, this treatment allowed the removal of all determined micropollutants to levels below the limit of detection (0.01-0.20 ng L(-1)). The efficiency of this process was then assessed based on the capacity to remove different groups of cultivable microorganisms and housekeeping (16S rRNA) and antibiotic resistance or related genes (intI1, blaTEM, qnrS, sul1). Photocatalytic ozonation was observed to efficiently remove microorganisms and ARGs. Although after storage total heterotrophic and ARB (to ciprofloxacin, gentamicin, meropenem), fungi, and the genes 16S rRNA and intI1, increased to values close to the pre-treatment levels, the ARGs (blaTEM, qnrS and sul1) were reduced to levels below/close to the quantification limit even after 3-days storage of treated surface water or wastewater. Yeast estrogen screen (YES), thiazolyl blue tetrazolium reduction (MTT) and lactate dehydrogenase (LDH) assays were also performed before and after photocatalytic ozonation to evaluate the potential estrogenic activity, the cellular metabolic activity and the cell viability. Compounds with estrogenic effects and significant differences concerning cell viability were not observed in any case. A slight cytotoxicity was only detected for Caco-2 and hCMEC/D3 cell lines after treatment of the urban wastewater, but not for L929 fibroblasts.pt_PT
dc.description.versioninfo:eu-repo/semantics/acceptedVersionpt_PT
dc.identifier.citationMoreira, N. F. F. [et al.] (2016). Photocatalytic ozonation of urban wastewater and surface water using immobilized TiO2 with LEDs: Micropollutants, antibiotic resistance genes and estrogenic activity. Water Research, 94(1), 10-22pt_PT
dc.identifier.doi10.1016/j.watres.2016.02.003pt_PT
dc.identifier.eid84958952616
dc.identifier.pmid26921709
dc.identifier.urihttp://hdl.handle.net/10400.14/23093
dc.identifier.wos000374360900002
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.relationPOCI-01-0145-FEDER-006984pt_PT
dc.relationLaboratory of Separation and Reaction Engineering
dc.relationCentre for Biotechnology and Fine Chemistry
dc.relationApplied Molecular Biosciences Unit
dc.relationAdvanced wastewater treatment: organic micropollutants, human pathogens and antibiotic resistance genes
dc.relationDevelopment of a miniaturized sample preparation prototype for identification and quantification of trace pharmaceuticals in tap waters
dc.relationAUTOMATION OF BIOCHEMICAL ASSAYS USING LAB-ON-VALVE AND BEAD INJECTION TECHNIQUES
dc.relationGraphene-based catalytic membranes for water treatment
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectPhotocatalytic ozonationpt_PT
dc.subjectLEDspt_PT
dc.subjectOrganic micropollutantspt_PT
dc.subjectMicrobial inactivation and regrowthpt_PT
dc.subjectAntibiotic resistance genespt_PT
dc.subjectCytotoxicitypt_PT
dc.titlePhotocatalytic ozonation of urban wastewater and surface water using immobilized TiO2 with LEDs: Micropollutants, antibiotic resistance genes and estrogenic activitypt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleLaboratory of Separation and Reaction Engineering
oaire.awardTitleCentre for Biotechnology and Fine Chemistry
oaire.awardTitleApplied Molecular Biosciences Unit
oaire.awardTitleAdvanced wastewater treatment: organic micropollutants, human pathogens and antibiotic resistance genes
oaire.awardTitleDevelopment of a miniaturized sample preparation prototype for identification and quantification of trace pharmaceuticals in tap waters
oaire.awardTitleAUTOMATION OF BIOCHEMICAL ASSAYS USING LAB-ON-VALVE AND BEAD INJECTION TECHNIQUES
oaire.awardTitleGraphene-based catalytic membranes for water treatment
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FEQU%2F50020%2F2013/PT
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oaire.citation.endPage22
oaire.citation.startPage10
oaire.citation.titleWater Researchpt_PT
oaire.citation.volume94
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