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Effect of the equilibria of multivalent metal sulfates on the transport through cation-exchange membranes at different current regimes

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Effect of the equilibria of multivalent metal sulfates on the transport through cation-exchange membranes at different current regimes

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dc.contributor.author Martí Calatayud, Manuel César es_ES
dc.contributor.author García Gabaldón, Montserrat es_ES
dc.contributor.author Pérez-Herranz, Valentín es_ES
dc.date.accessioned 2015-11-24T08:30:45Z
dc.date.available 2015-11-24T08:30:45Z
dc.date.issued 2013-09-15
dc.identifier.issn 0376-7388
dc.identifier.uri http://hdl.handle.net/10251/57973
dc.description.abstract The transport of trivalent metals (Cr(III) and Fe(III)) through cation-exchange membranes is studied and compared with the transport of mono- and divalent ions by means of chronopotentiometry and current-voltage characteristics. The species present in solutions of sulfate salts of multivalent metals give rise to different transport properties depending on the applied current. The detection of various transition times in the chronopotentiograms and two limiting current densities in the current-voltage curves reveals a change in the species being transported in the diffusion boundary layers and inside the membrane phase. At overlimiting current regimes, two different mass transfer mechanisms can predominate depending on the electrolyte composition. For the most concentrated solutions, gravitational convection promotes a decrease in the diffusion boundary layer thickness and the resistance of the membrane system decreases, whereas electroconvection takes place for both concentrated and weak electrolytes when a certain threshold in the membrane voltage drop is surpassed. The initial salt concentration has a significant effect on the emergence of the overlimiting conductance, since the length of the plateau of the current-voltage curves diminishes as a consequence of the size of the cations involved and the equilibrium conditions in which they take part. es_ES
dc.description.sponsorship Manuel-Cesar Marti-Calatayud wants to express his gratitude to Universitat Politecnica de Valencia for a postgraduate grant (Ref. 2010-12). This work was supported by Ministerio de Economia y Competitividad (Spain) with the project number CTQ2012-37450-C02-01/PPQ. en_EN
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation.ispartof Journal of Membrane Science es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Electrodialysis es_ES
dc.subject Metal ion es_ES
dc.subject Gravitational convection es_ES
dc.subject Electroconvection es_ES
dc.subject Limiting current density es_ES
dc.subject.classification INGENIERIA QUIMICA es_ES
dc.title Effect of the equilibria of multivalent metal sulfates on the transport through cation-exchange membranes at different current regimes es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.memsci.2013.04.058
dc.relation.projectID info:eu-repo/grantAgreement/MINECO//CTQ2012-37450-C02-01/ES/CARACTERIZACION ELECTROQUIMICA DE MEMBRANAS CERAMICAS NANOESTRUCTURADAS DE INTERCAMBIO IONICO PARA SU APLICACION EN REACTORES ELECTROQUIMICOS Y SISTEMAS ELECTRODIALITICOS/ es_ES
dc.rights.accessRights Cerrado es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Ingeniería Química y Nuclear - Departament d'Enginyeria Química i Nuclear es_ES
dc.description.bibliographicCitation Martí Calatayud, MC.; García Gabaldón, M.; Pérez-Herranz, V. (2013). Effect of the equilibria of multivalent metal sulfates on the transport through cation-exchange membranes at different current regimes. Journal of Membrane Science. 443:181-192. https://doi.org/10.1016/j.memsci.2013.04.058 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://dx.doi.org/10.1016/j.memsci.2013.04.058 es_ES
dc.description.upvformatpinicio 181 es_ES
dc.description.upvformatpfin 192 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 443 es_ES
dc.relation.senia 245992 es_ES
dc.contributor.funder Ministerio de Economía y Competitividad es_ES
dc.contributor.funder Universitat Politècnica de València es_ES


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