Impedance spectroscopy and membrane potential analysis of microfiltration membranes. The influence of surface fractality

Autores
Díaz, Darío Ramón; Carmona, Francisco Javier; Palacio, Laura; Ochoa, Nelio Ariel; Hernández, Antonio; Pradanos del Pico, Pedro
Año de publicación
2018
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
In this work, the proper charge density of a microfiltration membrane has been determined by using two different methods. Firstly, the ionic transport of a KCl solution has been investigated by simultaneous measurements of saline flux and membrane potential (MP) resulting from a concentration gradient through the membrane. A simple model, including all the relevant contributions to the global electrical potential drop, allowed a calculation of transport numbers and membrane charge density. The response of ions inside the membrane to an oscillating electrical potential has been analyzed by impedance spectroscopy (or electrical impedance spectroscopy EIS). A quite simple experimental EIS design allowed, by taking into account MP measurements too, an easy assignation of an equivalent circuit. After a careful analysis of EIS results, it was possible to evaluate the electrical conductivity inside the pores and the charge density. Both were found to be quite similar to the values obtained from MP alone. This agreement of EIS results with the MP ones, that are much simpler to deal with, confirms the accuracy of EIS to study the electrical properties of microfiltration membranes. The influence of electrode roughness and, in our EIS cell, the membrane roughness, on the constant phase element (CPE) of the equivalent circuit has been proved. Within this frame, the roughness fractal dimension of the membrane surface could be determined from EIS measurements. It resulted in fair agreement with the atomic force microscopy (AFM) determination.
Fil: Díaz, Darío Ramón. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich". Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich"; Argentina
Fil: Carmona, Francisco Javier. Universidad de Extremadura; España
Fil: Palacio, Laura. Universidad de Valladolid; España
Fil: Ochoa, Nelio Ariel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich". Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich"; Argentina
Fil: Hernández, Antonio. Universidad de Valladolid; España
Fil: Pradanos del Pico, Pedro. Universidad de Valladolid; España
Materia
ELECTRICAL IMPEDANCE SPECTROSCOPY
MEMBRANE POTENTIAL
MEMBRANE ROUGHNESS FRACTAL DIMENSION
MEMBRANE SURFACE CHARGE DENSITY
TRANSPORT NUMBERS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/86678
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/86678
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Impedance spectroscopy and membrane potential analysis of microfiltration membranes. The influence of surface fractalityDíaz, Darío RamónCarmona, Francisco JavierPalacio, LauraOchoa, Nelio ArielHernández, AntonioPradanos del Pico, PedroELECTRICAL IMPEDANCE SPECTROSCOPYMEMBRANE POTENTIALMEMBRANE ROUGHNESS FRACTAL DIMENSIONMEMBRANE SURFACE CHARGE DENSITYTRANSPORT NUMBERShttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1In this work, the proper charge density of a microfiltration membrane has been determined by using two different methods. Firstly, the ionic transport of a KCl solution has been investigated by simultaneous measurements of saline flux and membrane potential (MP) resulting from a concentration gradient through the membrane. A simple model, including all the relevant contributions to the global electrical potential drop, allowed a calculation of transport numbers and membrane charge density. The response of ions inside the membrane to an oscillating electrical potential has been analyzed by impedance spectroscopy (or electrical impedance spectroscopy EIS). A quite simple experimental EIS design allowed, by taking into account MP measurements too, an easy assignation of an equivalent circuit. After a careful analysis of EIS results, it was possible to evaluate the electrical conductivity inside the pores and the charge density. Both were found to be quite similar to the values obtained from MP alone. This agreement of EIS results with the MP ones, that are much simpler to deal with, confirms the accuracy of EIS to study the electrical properties of microfiltration membranes. The influence of electrode roughness and, in our EIS cell, the membrane roughness, on the constant phase element (CPE) of the equivalent circuit has been proved. Within this frame, the roughness fractal dimension of the membrane surface could be determined from EIS measurements. It resulted in fair agreement with the atomic force microscopy (AFM) determination.Fil: Díaz, Darío Ramón. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich". Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich"; ArgentinaFil: Carmona, Francisco Javier. Universidad de Extremadura; EspañaFil: Palacio, Laura. Universidad de Valladolid; EspañaFil: Ochoa, Nelio Ariel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich". Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich"; ArgentinaFil: Hernández, Antonio. Universidad de Valladolid; EspañaFil: Pradanos del Pico, Pedro. Universidad de Valladolid; EspañaPergamon-Elsevier Science Ltd2018-03info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/86678Díaz, Darío Ramón; Carmona, Francisco Javier; Palacio, Laura; Ochoa, Nelio Ariel; Hernández, Antonio; et al.; Impedance spectroscopy and membrane potential analysis of microfiltration membranes. The influence of surface fractality; Pergamon-Elsevier Science Ltd; Chemical Engineering Science; 178; 3-2018; 27-380009-2509CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.ces.2017.12.027info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0009250917307649info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:45:09Zoai:ri.conicet.gov.ar:11336/86678instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:45:09.523CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Impedance spectroscopy and membrane potential analysis of microfiltration membranes. The influence of surface fractality
title Impedance spectroscopy and membrane potential analysis of microfiltration membranes. The influence of surface fractality
spellingShingle Impedance spectroscopy and membrane potential analysis of microfiltration membranes. The influence of surface fractality
Díaz, Darío Ramón
ELECTRICAL IMPEDANCE SPECTROSCOPY
MEMBRANE POTENTIAL
MEMBRANE ROUGHNESS FRACTAL DIMENSION
MEMBRANE SURFACE CHARGE DENSITY
TRANSPORT NUMBERS
title_short Impedance spectroscopy and membrane potential analysis of microfiltration membranes. The influence of surface fractality
title_full Impedance spectroscopy and membrane potential analysis of microfiltration membranes. The influence of surface fractality
title_fullStr Impedance spectroscopy and membrane potential analysis of microfiltration membranes. The influence of surface fractality
title_full_unstemmed Impedance spectroscopy and membrane potential analysis of microfiltration membranes. The influence of surface fractality
title_sort Impedance spectroscopy and membrane potential analysis of microfiltration membranes. The influence of surface fractality
dc.creator.none.fl_str_mv Díaz, Darío Ramón
Carmona, Francisco Javier
Palacio, Laura
Ochoa, Nelio Ariel
Hernández, Antonio
Pradanos del Pico, Pedro
author Díaz, Darío Ramón
author_facet Díaz, Darío Ramón
Carmona, Francisco Javier
Palacio, Laura
Ochoa, Nelio Ariel
Hernández, Antonio
Pradanos del Pico, Pedro
author_role author
author2 Carmona, Francisco Javier
Palacio, Laura
Ochoa, Nelio Ariel
Hernández, Antonio
Pradanos del Pico, Pedro
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv ELECTRICAL IMPEDANCE SPECTROSCOPY
MEMBRANE POTENTIAL
MEMBRANE ROUGHNESS FRACTAL DIMENSION
MEMBRANE SURFACE CHARGE DENSITY
TRANSPORT NUMBERS
topic ELECTRICAL IMPEDANCE SPECTROSCOPY
MEMBRANE POTENTIAL
MEMBRANE ROUGHNESS FRACTAL DIMENSION
MEMBRANE SURFACE CHARGE DENSITY
TRANSPORT NUMBERS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv In this work, the proper charge density of a microfiltration membrane has been determined by using two different methods. Firstly, the ionic transport of a KCl solution has been investigated by simultaneous measurements of saline flux and membrane potential (MP) resulting from a concentration gradient through the membrane. A simple model, including all the relevant contributions to the global electrical potential drop, allowed a calculation of transport numbers and membrane charge density. The response of ions inside the membrane to an oscillating electrical potential has been analyzed by impedance spectroscopy (or electrical impedance spectroscopy EIS). A quite simple experimental EIS design allowed, by taking into account MP measurements too, an easy assignation of an equivalent circuit. After a careful analysis of EIS results, it was possible to evaluate the electrical conductivity inside the pores and the charge density. Both were found to be quite similar to the values obtained from MP alone. This agreement of EIS results with the MP ones, that are much simpler to deal with, confirms the accuracy of EIS to study the electrical properties of microfiltration membranes. The influence of electrode roughness and, in our EIS cell, the membrane roughness, on the constant phase element (CPE) of the equivalent circuit has been proved. Within this frame, the roughness fractal dimension of the membrane surface could be determined from EIS measurements. It resulted in fair agreement with the atomic force microscopy (AFM) determination.
Fil: Díaz, Darío Ramón. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich". Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich"; Argentina
Fil: Carmona, Francisco Javier. Universidad de Extremadura; España
Fil: Palacio, Laura. Universidad de Valladolid; España
Fil: Ochoa, Nelio Ariel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Luis. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich". Universidad Nacional de San Luis. Facultad de Ciencias Físico Matemáticas y Naturales. Instituto de Física Aplicada "Dr. Jorge Andrés Zgrablich"; Argentina
Fil: Hernández, Antonio. Universidad de Valladolid; España
Fil: Pradanos del Pico, Pedro. Universidad de Valladolid; España
description In this work, the proper charge density of a microfiltration membrane has been determined by using two different methods. Firstly, the ionic transport of a KCl solution has been investigated by simultaneous measurements of saline flux and membrane potential (MP) resulting from a concentration gradient through the membrane. A simple model, including all the relevant contributions to the global electrical potential drop, allowed a calculation of transport numbers and membrane charge density. The response of ions inside the membrane to an oscillating electrical potential has been analyzed by impedance spectroscopy (or electrical impedance spectroscopy EIS). A quite simple experimental EIS design allowed, by taking into account MP measurements too, an easy assignation of an equivalent circuit. After a careful analysis of EIS results, it was possible to evaluate the electrical conductivity inside the pores and the charge density. Both were found to be quite similar to the values obtained from MP alone. This agreement of EIS results with the MP ones, that are much simpler to deal with, confirms the accuracy of EIS to study the electrical properties of microfiltration membranes. The influence of electrode roughness and, in our EIS cell, the membrane roughness, on the constant phase element (CPE) of the equivalent circuit has been proved. Within this frame, the roughness fractal dimension of the membrane surface could be determined from EIS measurements. It resulted in fair agreement with the atomic force microscopy (AFM) determination.
publishDate 2018
dc.date.none.fl_str_mv 2018-03
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/86678
Díaz, Darío Ramón; Carmona, Francisco Javier; Palacio, Laura; Ochoa, Nelio Ariel; Hernández, Antonio; et al.; Impedance spectroscopy and membrane potential analysis of microfiltration membranes. The influence of surface fractality; Pergamon-Elsevier Science Ltd; Chemical Engineering Science; 178; 3-2018; 27-38
0009-2509
CONICET Digital
CONICET
url http://hdl.handle.net/11336/86678
identifier_str_mv Díaz, Darío Ramón; Carmona, Francisco Javier; Palacio, Laura; Ochoa, Nelio Ariel; Hernández, Antonio; et al.; Impedance spectroscopy and membrane potential analysis of microfiltration membranes. The influence of surface fractality; Pergamon-Elsevier Science Ltd; Chemical Engineering Science; 178; 3-2018; 27-38
0009-2509
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.ces.2017.12.027
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0009250917307649
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
publisher.none.fl_str_mv Pergamon-Elsevier Science Ltd
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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