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Numerical prediction of diffusion and electric field-induced iron nanoparticle transport

2015Journal article Restricted access
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datacite.subject.sdg11:Cidades e Comunidades Sustentáveispt_PT
dc.contributor.authorGomes, Helena I.
dc.contributor.authorRodríguez-Maroto, José Miguel
dc.contributor.authorRibeiro, Alexandra B.
dc.contributor.authorPamukcu, Sibel
dc.contributor.authorFerreira, Célia
dc.date.accessioned2023-07-03T13:42:00Z
dc.date.available2023-07-03T13:42:00Z
dc.date.issued2015
dc.description.abstractZero valent iron nanoparticles (nZVI) are considered very promising for the remediation of contaminated soils and groundwaters. However, an important issue related to their limited mobility remains unsolved. Direct current can be used to enhance the nanoparticles transport, based on the same principles of electrokinetic remediation. In this work, a generalized physicochemical model was developed and solved numerically to describe the nZVI transport through porous media under electric field, and with different electrolytes (with different ionic strengths). The model consists of the Nernst–Planck coupled system of equations, which accounts for the mass balance of ionic species in a fluid medium, when both the diffusion and electromigration of the ions are considered. The diffusion and electrophoretic transport of the negatively charged nZVI particles were also considered in the system. The contribution of electroosmotic flow to the overall mass transport was included in the model for all cases. The nZVI effective mobility values in the porous medium are very low (10 7 –10 4 cm2V 1 s 1 ), due to the counterbalance between the positive electroosmotic flow and the electrophoretic transport of the negatively charged nanoparticles. The higher the nZVI concentration is in the matrix, the higher the aggregation; therefore, low concentration of nZVI suspensions must be used for successful field application.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1016/j.electacta.2014.11.157pt_PT
dc.identifier.issn0013-4686
dc.identifier.urihttp://hdl.handle.net/10400.2/14182
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationCOUPLING ELECTROKINETICS AND IRON NANOPARTICLES FOR THE REMEDIATION OF CONTAMINATED SOILS
dc.relationNanoDC - Electrokinetic remediation of soil contaminated with persistent organic pollutants using iron nanoparticles
dc.subjectElectrokineticspt_PT
dc.subjectnZVIpt_PT
dc.subjectPorous mediapt_PT
dc.subjectElectrolytespt_PT
dc.subjectNernst–Planck equationspt_PT
dc.titleNumerical prediction of diffusion and electric field-induced iron nanoparticle transportpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleCOUPLING ELECTROKINETICS AND IRON NANOPARTICLES FOR THE REMEDIATION OF CONTAMINATED SOILS
oaire.awardTitleNanoDC - Electrokinetic remediation of soil contaminated with persistent organic pollutants using iron nanoparticles
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/OE/SFRH%2FBD%2F76070%2F2011/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876-PPCDTI/PTDC%2FAGR-AAM%2F101643%2F2008/PT
oaire.citation.endPage12pt_PT
oaire.citation.startPage5pt_PT
oaire.citation.titleElectrochimica actapt_PT
oaire.fundingStreamOE
oaire.fundingStream5876-PPCDTI
person.familyNameFerreira
person.givenNameCélia
person.identifier.ciencia-id931E-FBDE-2098
person.identifier.orcid0000-0002-7456-2538
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.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublicatione30010dd-0512-4da6-a0c9-910b47f18b4f
relation.isAuthorOfPublication.latestForDiscoverye30010dd-0512-4da6-a0c9-910b47f18b4f
relation.isProjectOfPublication6a44ebd9-c650-49e4-8e59-aca0c6eb8358
relation.isProjectOfPublicationa463c816-6254-4b42-8676-f96fcd1cdf24
relation.isProjectOfPublication.latestForDiscovery6a44ebd9-c650-49e4-8e59-aca0c6eb8358

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