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dc.contributor.authorZimmermann, Pauline
dc.contributor.authorTekinalp, Önder
dc.contributor.authorSolberg, Simon Birger Byremo
dc.contributor.authorWilhelmsen, Øivind
dc.contributor.authorDeng, Liyuan
dc.contributor.authorBurheim, Odne Stokke
dc.date.accessioned2023-12-19T09:39:27Z
dc.date.available2023-12-19T09:39:27Z
dc.date.created2023-04-28T11:30:06Z
dc.date.issued2023
dc.identifier.issn0011-9164
dc.identifier.urihttps://hdl.handle.net/11250/3108146
dc.description.abstractElectrodialysis is a promising technology to remove low concentrations of target ions from multi-ionic mixtures. While the synthesis of selective membranes is a prominent topic in research, few studies have been presented on selectivity-enhancing process design. This work investigates the limiting current density as a selectivity promoter in removing dilute target ions from a concentrated solution. Ambiguities and challenges in the prevailing definitions of the limiting current density are identified, and a new approach based on the Nernst equation is proposed, the boundary-layer method. Chloride and fluoride with starting concentrations of 10 mM were removed from 1 M sodium sulfate base electrolyte with varying current density levels around the limiting value. Removal rates, separation efficiencies, and energy consumption were compared. The separation efficiencies between chloride and sulfate and fluoride and sulfate had their highest values at 0.93 and 0.81, respectively, when operating at 130 A/m2. We demonstrate that increasing the ion selectivity through the ion-specific limiting current density is possible and only requires standard current-voltage data. The experimental results suggest that process optimization is an essential supplement to membrane development to enhance the selective removal of target ions by electrodialysis.en_US
dc.language.isoengen_US
dc.publisherElsevier B. V.en_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleLimiting current density as a selectivity factor in electrodialysis of multi-ionic mixturesen_US
dc.title.alternativeLimiting current density as a selectivity factor in electrodialysis of multi-ionic mixturesen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionpublishedVersionen_US
dc.source.volume558en_US
dc.source.journalDesalinationen_US
dc.identifier.doi10.1016/j.desal.2023.116613
dc.identifier.cristin2144157
dc.source.articlenumber116613en_US
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal