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Mass transfer phenomena during electrodialysis of multivalent ions: chemical equilibria and overlimiting currents

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Mass transfer phenomena during electrodialysis of multivalent ions: chemical equilibria and overlimiting currents

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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 2019-05-16T20:01:32Z
dc.date.available 2019-05-16T20:01:32Z
dc.date.issued 2018 es_ES
dc.identifier.uri http://hdl.handle.net/10251/120596
dc.description.abstract [EN] Electrodialysis is utilized for the deionization of saline streams, usually formed by strong electrolytes. Recently, interest in new applications involving the transport of weak electrolytes through ion-exchangemembranes has increased. Clear examples of such applications are the recovery of valuable metal ions from industrial effluents, such as electronic wastes or mining industries. Weak electrolytes give rise to a variety of ions with different valence, charge sign and transport properties. Moreover, development of concentration polarization under the application of an electric field promotes changes in the chemical equilibrium, thus making more complex understanding of mass transfer phenomena in such systems. This investigation presents a set of experiments conducted with salts of multivalent metals with the aim to provide better understanding on the involved mass transfer phenomena. Chronopotentiometric experiments and current-voltage characteristics confirm that shifts in chemical equilibria can take place simultaneous to the activation of overlimiting mass transfer mechanisms, that is, electroconvection and water dissociation. Electroconvection has been proven to affect the type of precipitates formed at the membrane surface thus suppressing the simultaneous dissociation of water. For some electrolytes, shifts in the chemical equilibria forced by an imposed electric field generate new charge carriers at specific current regimes, thus reducing the system resistance. es_ES
dc.description.sponsorship Manuel Cesar Marti-Calatayud acknowledges the funding received from Generalitat Valenciana (ASPOSTD/2017/059).
dc.language Inglés es_ES
dc.publisher MDPI AG es_ES
dc.relation.ispartof Applied Sciences (Basel) es_ES
dc.rights Reconocimiento (by) es_ES
dc.subject Overlimiting mass transfer es_ES
dc.subject Electroconvection es_ES
dc.subject Water dissociation es_ES
dc.subject Electrodialysis es_ES
dc.subject Ion transport es_ES
dc.subject Weak electrolytes es_ES
dc.subject Multivalent ion transport es_ES
dc.subject Electromembrane processes es_ES
dc.subject Ion-exchange membranes es_ES
dc.subject.classification INGENIERIA QUIMICA es_ES
dc.title Mass transfer phenomena during electrodialysis of multivalent ions: chemical equilibria and overlimiting currents es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.3390/app8091566 es_ES
dc.relation.projectID info:eu-repo/grantAgreement/GVA//APOSTD%2F2017%2F059/ es_ES
dc.rights.accessRights Abierto 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. (2018). Mass transfer phenomena during electrodialysis of multivalent ions: chemical equilibria and overlimiting currents. Applied Sciences (Basel). 8(9):1-13. https://doi.org/10.3390/app8091566 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://doi.org/10.3390/app8091566 es_ES
dc.description.upvformatpinicio 1 es_ES
dc.description.upvformatpfin 13 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 8 es_ES
dc.description.issue 9 es_ES
dc.identifier.eissn 2076-3417 es_ES
dc.relation.pasarela S\384657 es_ES
dc.contributor.funder Generalitat Valenciana es_ES
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