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Synthesis and bactericide activity of nanofiltration composite membranes - Cellulose acetate/silver nanoparticles and cellulose acetate/silver ion exchanged zeolites

2019-02-01Journal article Restricted access
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dc.contributor.authorBeisl, Stefan
dc.contributor.authorMonteiro, Silvia
dc.contributor.authorSantos, Ricardo
dc.contributor.authorFigueiredo, Ana Sofia
dc.contributor.authorSANCHEZ-LOREDO, MARIA GUADALUPE
dc.contributor.authorLemos, Maria Amélia
dc.contributor.authorLemos, Francisco
dc.contributor.authorMinhalma, Miguel
dc.contributor.authorDe Pinho, Maria Norberta
dc.date.accessioned2019-05-08T08:48:19Z
dc.date.available2019-05-08T08:48:19Z
dc.date.issued2019-02-01
dc.description.abstractThe present work addresses the synthesis of nanofiltration composite membranes with bactericide properties. The cellulose acetate based membranes with polyvinylpyrrolidone coated silver nano particles, silver ion-exchanged beta-zeolite and beta-zeolite are casted by the phase inversion technique and subjected to an annealing post-treatment. They are characterized in terms of the nanofiltration permeation performance and antibacterial properties. The incorporation of silver nanoparticles produces a threefold increase in the membrane hydraulic permeability when compared to the silver-free membranes and the incorporation of silver ion loaded zeolite resulted in a 56.3% increase in hydraulic permeability. In contrast to the influence of silver presence, either in nanometric or in the ionic form, the presence of zeolite does not significantly influence the hydraulic permeability. The rejection coefficients to salts range from 83% to 93% for the silver ion-exchanged zeolite membrane and from 84% to 97% for the polyvinylpyrrolidone coated silver nanoparticles membrane. They are higher for sulfate salts than for chloride salts. The antibacterial properties of the membranes were evaluated against Escherichia coli. The results have shown that the silver ion-exchanged beta-zeolite membrane was effective in inactivating Escherichia coli after just 210 min of contact time. No bacterial activity was detected following 24 h of contact time with the membrane containing polyvinylpyrrolidone coated silver nanoparticles. A reduction of more than 6-log, in the number of Escherichia coli, was achieved for both membranes. The different patterns of bactericide activity are associated to the silver speciation in metallic or ionic form. The high flux nanofiltration composite membranes with bactericidal properties represent a strong asset in water treatment biofouling control.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationBEISL, Stefan; [et al] – Synthesis and bactericide activity of nanofiltration composite membranes - Cellulose acetate/silver nanoparticles and cellulose acetate/silver ion exchanged zeolites. Water Research. ISSN 0043-1354. Vol. 149 (2019), pp. 225-231pt_PT
dc.identifier.doi10.1016/j.watres.2018.10.096pt_PT
dc.identifier.issn0043-1354
dc.identifier.urihttp://hdl.handle.net/10400.21/9959
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relation.publisherversionhttps://reader.elsevier.com/reader/sd/pii/S0043135418309242?token=A28FE1729BE1130F0BA93DF2367E9770AEC82F1BA813FCEC804D6C30051E3BDFFA2BF35B324480C7C757EA30DBD3971Apt_PT
dc.subjectHigh flux nanofiltrationpt_PT
dc.subjectBiofoulingpt_PT
dc.subjectCellulose acetate composite membranespt_PT
dc.subjectPolyvinylpyrrolidone coated silver nanoparticlespt_PT
dc.subjectSilver ion exchanged zeolitespt_PT
dc.subjectBactericide activity through nanometric and/or ionic silverpt_PT
dc.titleSynthesis and bactericide activity of nanofiltration composite membranes - Cellulose acetate/silver nanoparticles and cellulose acetate/silver ion exchanged zeolitespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FCTM%2F04540%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FECI%2F04028%2F2013/PT
oaire.citation.endPage231pt_PT
oaire.citation.startPage225pt_PT
oaire.citation.titleWater Researchpt_PT
oaire.citation.volume149pt_PT
oaire.fundingStream5876
oaire.fundingStream5876
person.familyNameBeisl
person.familyNameNunes Monteiro
person.familyNameSantos
person.familyNameFigueiredo
person.familyNameSANCHEZ-LOREDO
person.familyNameLemos
person.familyNameLemos
person.familyNameMinhalma
person.familyNamede Pinho
person.givenNameStefan
person.givenNameSilvia Patricia
person.givenNameRicardo
person.givenNameAna Sofia
person.givenNameMARIA GUADALUPE
person.givenNameMaria Amélia
person.givenNameFrancisco
person.givenNameMiguel
person.givenNameMaria Norberta
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person.identifier.orcid0000-0001-9424-1558
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person.identifier.orcid0000-0002-9271-8444
person.identifier.orcid0000-0001-8317-3713
person.identifier.orcid0000-0001-8463-3267
person.identifier.orcid0000-0002-7795-1002
person.identifier.orcid0000-0002-6770-194X
person.identifier.orcid0000-0002-5339-1784
person.identifier.ridB-4010-2012
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person.identifier.scopus-author-id56533256600
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person.identifier.scopus-author-id57194262417
person.identifier.scopus-author-id6506304514
person.identifier.scopus-author-id7005561562
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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