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Listar por palabra clave "Chronopotentiometry"

Mostrando ítems 1-15 de 15

A three-stage chemical cleaning of ion-exchange membranes used in the treatment by electrodialysis of wastewaters generated in brass electroplating industries

Santana Barros, Kayo; Martí Calatayud, Manuel César; Pérez-Herranz, Valentín; Espinosa, Denise Crocce Romano (Elsevier, 2020-10-15)

[EN] After long-term electrodialysis, cleaning the membranes is crucial to extend their lifetime. In this work, we evaluate the effects of a three-stage chemical cleaning on electrochemical and structural properties of ...
Anion transport through ceramic electrodialysis membranes made with hydrated cerium dioxide

Mora-Gómez, Julia; García Gabaldón, Montserrat; Martí Calatayud, Manuel César; Mestre, Sergio; Pérez-Herranz, Valentín (Blackwell Publishing, 2017)

[EN] In this research, low-cost ceramic anion-exchange membranes have been developed from porous supports manufactured, using a chamotte as a pore former. An inorganic anion-exchanger (hydrated cerium dioxide) has been ...
Chronopotentiometric study of ceramic cation-exchange membranes based on zirconium phosphate in contact with nickel sulfate solutions

Martí Calatayud, Manuel César; García Gabaldón, Montserrat; Pérez-Herranz, Valentín; Sales, Sonia; Mestre, Sergio (Taylor & Francis, 2013-01)

In this article, the innovative cation-exchange membranes obtained from ceramic materials are presented. Different microporous ceramic supports were obtained from an initial mixture of alumina and kaolin, to which a ...
Chronopotentiometric study of the transport of phosphoric acid anions through an anion-exchange membrane under different pH values

Gally, C.; García Gabaldón, Montserrat; Ortega Navarro, Emma María; Bernardes, A.M.; Pérez-Herranz, Valentín (Elsevier, 2020-05-01)

[EN] Phosphate is the main cause of eutrophication in many water bodies. Its presence in waters is associated to the fact that is not completely removed in conventional wastewater treatment plants. On the other side, ...
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 ...
Estudio de la dinámica del transporte en sistemas de electrodiálisis de aniones orgánicos obtenidos a partir de recursos renovables

Balseviciute, Adele (Universitat Politècnica de València, 2020-10-13)

[ES] En este trabajo se estudiará la dinámica del transporte de aniones orgánicos obtenidos a partir de recursos renovables y concentradas mediante electrodiálisis. Dicho transporte tiene lugar a través de membranas de ...
Evaluation of mass transfer behaviour of sulfamethoxazole species at ion-exchange membranes by chronopotentiometry for electrodialytic processes

Santana-Barros, Kayo; Giacobbo, Alexandre; Agnol, Gustavo Dall; Pérez-Herranz, Valentín; Velizarov, Svetlozar; Moura Bernardes, Andrea (Elsevier, 2023-02-15)

[EN] In recent years, electrodialysis has been often considered as an appropriate method to treat industrial and/or municipal wastewater containing pharmaceutically active compounds. However, the scarcity of information ...
Evaluation of the transport properties of copper ions through a heterogeneous ion-exchange membrane in etidronic acid solutions by chronopotentiometry

Scarazzato, T.; Panossian, Z.; García Gabaldón, Montserrat; Ortega Navarro, Emma María; Tenório, J.A.S.; Pérez-Herranz, Valentín; Espinosa, D.C.R. (Elsevier, 2017-08-01)

[EN] The transport properties of copper chelates across an anion-exchange membrane were investigated by means of chronopotentiometry. Several solutions containing etidronic acid, copper sulfate and potassium chloride were ...
Evaluation of two ion-exchange membranes for the transport of tin in the presence of hydrochloric acid

García Gabaldón, Montserrat; Pérez-Herranz, Valentín; Ortega Navarro, Emma María (Elsevier, 2011-01-19)

The transport properties of two ion-exchange membranes in the presence of tin, as Sn(II) and Sn(IV), were investigated by chronopotentiometry and current-voltage curves. Since tin forms positively or negatively charged ...
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 ...
Pentacene thin films on ferromagnetic oxide: Growth mechanism and spintronic devices

Graziosi, Patrizio; Riminucci, A.; Prezioso, M.; Newby, C.; Brunel, Daniel; Bergenti, I.; Pullini, Daniele; Busquets Mataix, David Jerónimo; Ghidini, M.; Dediu, V.A. (American Institute of Physics (AIP), 2014-07)

[EN] Cation-exchange membranes made exclusively from ceramic materials have been synthesized by means of the impregnation of microporous ceramic supports with zirconium phosphate. Changes in the pore size distribution and ...
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 ...
Synthesis and electrochemical behavior of ceramic cation-exchange membranes based on zirconium phosphate

Martí Calatayud, Manuel César; García Gabaldón, Montserrat; Pérez-Herranz, Valentín; Sales, S.; Mestre, Sergio (Elsevier, 2013-05)

Cation-exchange membranes made exclusively from ceramic materials have been synthesized by means of the impregnation of microporous ceramic supports with zirconium phosphate. Changes in the pore size distribution and total ...
Treatment of Cyanide-Free Wastewater from Brass Electrodeposition with EDTA by Electrodialysis: Evaluation of Underlimiting and Overlimiting Operations

Santana Barros, Kayo; Scarazzato, Tatiana; Pérez-Herranz, Valentín; Espinosa, Denise Crocce Romano (MDPI AG, 2020-04)

[EN] Growing environmental concerns have led to the development of cleaner processes, such as the substitution of cyanide in electroplating industries and changes in the treatment of wastewaters. Hence, we evaluated the ...