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Study of the effects of the applied current regime and the concentration of chromic acid on the transport of Ni2+ ions through Nafion 117 membranes

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Study of the effects of the applied current regime and the concentration of chromic acid on the transport of Ni2+ ions through Nafion 117 membranes

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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 2017-02-21T10:47:01Z
dc.date.available 2017-02-21T10:47:01Z
dc.date.issued 2012-12-23
dc.identifier.issn 0376-7388
dc.identifier.uri http://hdl.handle.net/10251/78103
dc.description.abstract In the present work galvanostatic experiments are conducted with an electrodialysis cell in order to study the passage of Ni 2+ ions present in chromic acid solutions through a Nafion cation-exchange membrane. The competing transport between H + and Ni 2+ ions through the membranes has been studied under the imposition of under- and overlimiting currents. Results show an increasing competence between both ions when the concentration of protons exceeds that of the Ni 2+ ions. Increased nickel removal rates and current efficiency values were achieved with intensive current regimes due to the onset of electroconvection. However, at low values of the [Ni 2+]/[H +] ratio, this improved transfer through the membrane implies high values of specific energy consumption due to increased membrane voltage drops, thus decreasing the convenience of applying overlimiting currents. The obtained results are related to the values of plateau length calculated from the polarization curves of this membrane/electrolyte system and prove that Ni 2+ ions promote the arising of electroconvective vortices, whereas H + ions hamper electroconvection. © 2011 Elsevier B.V. es_ES
dc.description.sponsorship The authors of this work would like to express their gratitude to Ministerio de Ciencia e Innovacion (Spain) for their financial support (CTQ2008-06750-C02-01/PPQ) and to Universitat Politecnica de Valencia for a postgraduate grant (Ref. 2010-12). 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 Cr(VI) es_ES
dc.subject Electroconvection es_ES
dc.subject Electrodialysis es_ES
dc.subject Limiting current density es_ES
dc.subject Ni(II) es_ES
dc.subject Applied current es_ES
dc.subject Cation exchange membranes es_ES
dc.subject Chromic acid es_ES
dc.subject Chromic acid solutions es_ES
dc.subject Current efficiency es_ES
dc.subject Galvanostatics es_ES
dc.subject Membrane voltage es_ES
dc.subject Nafion 117 membranes es_ES
dc.subject Nickel removal es_ES
dc.subject Polarization curves es_ES
dc.subject Specific energy consumption es_ES
dc.subject Chromium compounds es_ES
dc.subject Drops es_ES
dc.subject Energy utilization es_ES
dc.subject Membranes es_ES
dc.subject Ions es_ES
dc.subject Electrolyte es_ES
dc.subject Ion es_ES
dc.subject Nickel es_ES
dc.subject Proton es_ES
dc.subject Article es_ES
dc.subject Chemical composition es_ES
dc.subject Concentration (parameters) es_ES
dc.subject Controlled study es_ES
dc.subject Density gradient es_ES
dc.subject Electric potential es_ES
dc.subject Electrostimulation es_ES
dc.subject Energy consumption es_ES
dc.subject Ion transport es_ES
dc.subject Membrane es_ES
dc.subject Membrane current es_ES
dc.subject Membrane depolarization es_ES
dc.subject Molecule es_ES
dc.subject Nafion cation exchange membrane es_ES
dc.subject Priority journal es_ES
dc.subject Thermodynamics es_ES
dc.subject Waste component removal es_ES
dc.subject Water contamination es_ES
dc.subject.classification INGENIERIA QUIMICA es_ES
dc.title Study of the effects of the applied current regime and the concentration of chromic acid on the transport of Ni2+ ions through Nafion 117 membranes es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.memsci.2011.12.012
dc.relation.projectID info:eu-repo/grantAgreement/MICINN//CTQ2008-06750-C02-01/ES/ESTUDIO DE LA RECUPERACION DE CROMO HEXAVALENTE DE LOS EFLUENTES DE LAS INDUSTRIAS DE TRATAMIENTO DE SUPERFICIES MEDIANTE NUEVOS REACTORES ELECTROQUIMICOS/ es_ES
dc.rights.accessRights Cerrado es_ES
dc.contributor.affiliation Universitat Politècnica de València. Escuela Técnica Superior de Ingenieros Industriales - Escola Tècnica Superior d'Enginyers Industrials 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. (2012). Study of the effects of the applied current regime and the concentration of chromic acid on the transport of Ni2+ ions through Nafion 117 membranes. Journal of Membrane Science. 392-393:137-149. https://doi.org/10.1016/j.memsci.2011.12.012 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://dx.doi.org/10.1016/j.memsci.2011.12.012 es_ES
dc.description.upvformatpinicio 137 es_ES
dc.description.upvformatpfin 149 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 392-393 es_ES
dc.relation.senia 207514 es_ES
dc.contributor.funder Ministerio de Ciencia e Innovación es_ES
dc.contributor.funder Universitat Politècnica de València es_ES


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