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dc.contributor.authorPagès Hernando, Neus
dc.contributor.authorYaroshchuk, Andriy
dc.contributor.authorGibert Agulló, Oriol
dc.contributor.authorCortina Pallás, José Luís
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Química
dc.date.accessioned2014-01-17T11:41:48Z
dc.date.created2013-12-18
dc.date.issued2013-12-18
dc.identifier.citationPages, N. [et al.]. Rejection of trace ionic solutes in nanofiltration: Influence of aqueous phase composition. "Chemical engineering science", 18 Desembre 2013, vol. 104, p. 1107-1115.
dc.identifier.issn0009-2509
dc.identifier.urihttp://hdl.handle.net/2117/21262
dc.description.abstractThe use of nanofiltration (NF) in water treatment has been proposed to improve the quality of the produced water and extend the options of concentrate valorization, taking the benefit of its different ions selectivity patterns. However, there is a need to understand and optimize the rejection not only of major components (e.g. NaCl or MgSO4) but also of minor components specially in brackish waters. The selectivity of ion rejection by NF membranes has been studied theoretically and experimentally. Theoretical analysis has been carried out within the scope of the solution-diffusion-film model (SDFM) recently extended to electrolyte mixtures. In this study, experimental ion rejection data of typical cationic and anionic species present in surface waters at various trans-membrane pressures and cross-flow velocities have been obtained with a NF membrane (NF270). Several combinations of dominant salts (NaCl, MgCl2, MgSO4, Na2SO4) with trace ions (Na+, Cl−, Mg2+, SO42−) have been used. The rejection of ions crucially depends on their environment. The dramatic differences in the rejections can be explained by the spontaneously arising electric fields generated in the membrane phase. Their effect gives rise to negative rejections of singly charged inorganic ions present as small additions to well-rejected dominant salts. As a result of theoretical interpretation the intrinsic membrane permeabilities to ions have been estimated for different aqueous solutions compositions
dc.format.extent9 p.
dc.language.isoeng
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Enginyeria dels materials
dc.subject.lcshNanofiltration
dc.subject.lcshWater--Purification.
dc.subject.otherCross-flow
dc.subject.otherDominant salt
dc.subject.otherNanofiltration
dc.subject.otherNegative rejection
dc.subject.otherSolution-diffusion-film model
dc.subject.otherTrace ion
dc.titleRejection of trace ionic solutes in nanofiltration: Influence of aqueous phase composition
dc.typeArticle
dc.subject.lemacNanofiltració
dc.subject.lemacAigua -- Depuració
dc.subject.lemacSeparació de membranes
dc.contributor.groupUniversitat Politècnica de Catalunya. SETRI - Grup de Tècniques de Separació i Tractament de Residus Industrials
dc.identifier.doi10.1016/j.ces.2013.09.042
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttp://www.sciencedirect.com/science/article/pii/S0009250913006611
dc.rights.accessRestricted access - publisher's policy
local.identifier.drac12955828
dc.description.versionPostprint (published version)
dc.date.lift10000-01-01
local.citation.authorPages, N.; Yaroshchuk, A.; Gibert, O.; Cortina, J.
local.citation.publicationNameChemical engineering science
local.citation.volume104
local.citation.startingPage1107
local.citation.endingPage1115


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