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Listar por palabra clave "Electroconvection"

Mostrando ítems 1-8 de 8

Chronopotentiometric study on the simultaneous transport of EDTA ionic species and hydroxyl ions through an anion-exchange membrane for electrodialysis applications

Santana Barros, Kayo; Martí Calatayud, Manuel César; Ortega Navarro, Emma María; Pérez-Herranz, Valentín; Espinosa, Denise Crocce Romano (Elsevier, 2020-12-15)

[EN] The use of EDTA as a complexing agent in electrodialysis has gained increasing attention in several industrial applications. Variations in pH at the membrane surface are known to alter the chemical equilibrium of EDTA ...
Determination of transport properties of Ni(II) through a Nafion cation-exchange membrane in chromic acid solutions

Martí Calatayud, Manuel César; García Gabaldón, Montserrat; Pérez-Herranz, Valentín; Ortega Navarro, Emma María (Elsevier, 2011-07-07)

The transport properties of a cation-exchange membrane in the presence of nickel sulphate solutions were investigated by means of chronopotentiometry. The interest of this study relies on the application to the treatment ...
Effect of the equilibria of multivalent metal sulfates on the transport through cation-exchange membranes at different current regimes

Martí Calatayud, Manuel César; García Gabaldón, Montserrat; Pérez-Herranz, Valentín (Elsevier, 2013-09-15)

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. ...
Interplay between Forced Convection and Electroconvection during the Overlimiting Ion Transport through Anion-Exchange Membranes: A Fourier Transform Analysis of Membrane Voltage Drops

Hernández-Pérez, Lorena; Martí Calatayud, Manuel César; Montañés, Maria-Teresa; Pérez-Herranz, Valentín (MDPI AG, 2023-03)

[EN] Electrodialysis (ED) applications have expanded in recent years and new modes of operation are being investigated. Operation at overlimiting currents involves the phenomenon of electroconvection, which is associated ...
Investigation of ion-exchange membranes by means of chronopotentiometry: A comprehensive review on this highly informative and multipurpose technique

Santana Barros, Kayo; Martí Calatayud, Manuel César; Scarazzato, Tatiana; Moura Bernardes, Andréa; Espinosa, Denise Crocce Romano; Pérez-Herranz, Valentín (Elsevier, 2021-07)

[EN] Electrodialysis is mostly used for drinking water production but it has gained applicability in different new fields in recent decades. Membrane characteristics and ion transport properties strongly influence the ...
Mass transfer phenomena during electrodialysis of multivalent ions: chemical equilibria and overlimiting currents

Martí Calatayud, Manuel César; García Gabaldón, Montserrat; Pérez-Herranz, Valentín (MDPI AG, 2018)

[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 ...
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

Martí Calatayud, Manuel César; García Gabaldón, Montserrat; Pérez-Herranz, Valentín (Elsevier, 2012-12-23)

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 ...
STUDY OF THE TRANSPORT OF HEAVY METAL IONS THROUGH CATION-EXCHANGE MEMBRANES APPLIED TO THE TREATMENT OF INDUSTRIAL EFFLUENTS

Martí Calatayud, Manuel César (Universitat Politècnica de València, 2015-01-12)

La presente Tesis Doctoral consiste en la determinación de las propiedades de transporte de diferentes especies catiónicas a través de membranas de intercambio catiónico. Las membranas de intercambio iónico son un componente ...