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The effect of TiO2 nanoparticles removal on drinking water quality produced by conventional treatment C/F/S

2017-02Journal article Restricted access
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dc.contributor.authorSerrão Sousa, Vânia
dc.contributor.authorCorniciuc, Claudia
dc.contributor.authorRibau Teixeira, Margarida
dc.date.accessioned2019-11-20T15:07:51Z
dc.date.available2019-11-20T15:07:51Z
dc.date.issued2017-02
dc.description.abstractNanoparticles, namely titanium dioxide (TiO2), are emerging contaminants widely used to commercial and industrial applications, are a potential hazard and can cause damage to environment and human health due to their toxicity. Therefore, their removal from the water is urgent to minimize or eliminate the adverse environmental and human effects. This work, investigates the efficiency of conventional coagulation/flocculation/sedimentation (C/F/S) from drinking water treatment to remove TiO2 nano particles (NPs) from surface waters, and pretends to understand if the removal of TiO2 NPs affects the ability of C/F/S to remove natural organic matter (NOM) and turbidity, and consequently affects the quality of the treated water. Results show that TiO2 NPs removal is high (>90%) for all the waters studied (hydrophobic and hydrophilic waters) and the treated water quality is not compromised (turbidity, Ti and Al concentrations, pH and conductivity are below the national and international guidelines). In addition, TiO2 initial concentrations, ranging between 0.2 and 10 mg/L, have not a significant impact on NPs removal by C/F/S. Therefore, the widely used polyaluminium based coagulants are effective in the removal of TiO2 NPs by conventional C/F/S treatment, but removal is strongly influenced by the water characteristics. Hydrophobic waters need a higher coagulant dose than hydrophilic waters to achieve the same TiO2 NPs removals, as well as water with higher UV254nm values. The principal mechanism involved in TiO2 NPs removal is charge neutralisation. (C) 2016 Elsevier Ltd. All rights reserved.
dc.description.sponsorshipPortuguese Foundation of Science and Technology [SFRH/BD/100402/2014]
dc.identifier.doi10.1016/j.watres.2016.11.030
dc.identifier.issn0043-1354
dc.identifier.urihttp://hdl.handle.net/10400.1/13247
dc.language.isoeng
dc.peerreviewedyes
dc.publisherPergamon-Elsevier Science Ltd
dc.subjectNatural organic-matter
dc.subjectTitanium-dioxide nanoparticles
dc.subjectDissolved air flotation
dc.subjectSilver nanoparticles
dc.subjectCyanobacterial cells
dc.subjectOxide nanoparticles
dc.subjectIonic-strength
dc.subjectWaste-water
dc.subjectCoagulation
dc.subjectAggregation
dc.titleThe effect of TiO2 nanoparticles removal on drinking water quality produced by conventional treatment C/F/S
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage12
oaire.citation.startPage1
oaire.citation.titleWater Research
oaire.citation.volume109
person.familyNameSerrão Sousa
person.familyNameRibau Teixeira
person.givenNameVânia
person.givenNameMargarida
person.identifier.ciencia-id3D18-B03F-52FB
person.identifier.ciencia-id9111-87FB-26AA
person.identifier.orcid0000-0002-3800-1688
person.identifier.orcid0000-0002-2153-3282
person.identifier.ridB-9012-2012
person.identifier.scopus-author-id8988625600
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublication6f5ba6dd-2326-47fb-a278-85ce38b81c64
relation.isAuthorOfPublicationadfcbe65-54a7-4cce-b874-bb8e2bdc6167
relation.isAuthorOfPublication.latestForDiscovery6f5ba6dd-2326-47fb-a278-85ce38b81c64

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