Characterization of poly(acrylic) acid-modified heterogenous anion exchange membranes with improved monovalent permselectivity for RED

The performance of anion-exchange membranes (AEMs) in Reverse Electrodialysis is hampered by both presence of multivalent ions and fouling phenomena, thus leading to reduced net power density. Therefore, we propose a monolayer surface modification procedure to functionalize Ralex-AEMs with poly(acry...

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Detalles Bibliográficos
Autores: Merino García, Iván, Kotoka, Francis, Portugal, Carla Alexandra Moreira, Crespo, João P. S. Goulão, Velizarov, Svetlozar Gueorguiev
Tipo de recurso: artículo
Fecha de publicación:2020
País:España
Institución:Universidad de Cantabria (UC)
Repositorio:UCrea Repositorio Abierto de la Universidad de Cantabria
Idioma:inglés
OAI Identifier:oai:repositorio.unican.es:10902/22784
Acceso en línea:http://hdl.handle.net/10902/22784
Access Level:acceso abierto
Palabra clave:Anion exchange membranes
Poly(acrylic) acid modification
Monovalent permselective membranes
Antifouling strategies
Reverse electrodialysis
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spelling Characterization of poly(acrylic) acid-modified heterogenous anion exchange membranes with improved monovalent permselectivity for REDMerino García, IvánKotoka, FrancisPortugal, Carla Alexandra MoreiraCrespo, João P. S. GoulãoVelizarov, Svetlozar GueorguievAnion exchange membranesPoly(acrylic) acid modificationMonovalent permselective membranesAntifouling strategiesReverse electrodialysisThe performance of anion-exchange membranes (AEMs) in Reverse Electrodialysis is hampered by both presence of multivalent ions and fouling phenomena, thus leading to reduced net power density. Therefore, we propose a monolayer surface modification procedure to functionalize Ralex-AEMs with poly(acrylic) acid (PAA) in order to (i) render a monovalent permselectivity, and (ii) minimize organic fouling. Membrane surface modification was carried out by putting heterogeneous AEMs in contact with a PAA-based aqueous solution for 24 h. The resulting modified membranes were firstly characterized by contact angle, water uptake, ion exchange capacity, fixed charge density, and swelling degree measurements, whereas their electrochemical responses were evaluated through cyclic voltammetry. Besides, their membrane electro-resistance was also studied via electrochemical impedance spectroscopy analyses. Finally, membrane permselectivity and fouling behavior in the presence of humic acid were evaluated through mass transport experiments using model NaCl containing solutions. The use of modified PAA-AEMs resulted in a significantly enhanced monovalent permselectivity (sulfate rejection improved by >35%) and membrane hydrophilicity (contact angle decreased by >15%) in comparison with the behavior of unmodified Ralex-AEMs, without compromising the membrane electro-resistance after modification, thus demonstrating the technical feasibility of the proposed membrane modification procedure. This study may therefore provide a feasible way for achieving an improved Reverse Electrodialysis process efficiency.This research was funded by “Programa Operacional Regional de Lisboa, na componente FEDER” and “Fundação para a Ciência e Tecnologia, I.P.”. (FCT) through research project PTDC/EQU-EPQ/29579/2017. This work was also supported by the Associate Laboratory for Green Chemistry-LAQV, which is financed by national funds from FCT/MCTES (UID/QUI/50006/2019).MDPIUniversidad de Cantabria20202020-06-26journal articlehttp://purl.org/coar/resource_type/c_6501NAhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43info:eu-repo/semantics/articlehttp://hdl.handle.net/10902/22784Membranes, 2020, 10(6), 134reponame:UCrea Repositorio Abierto de la Universidad de Cantabriainstname:Universidad de Cantabria (UC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:repositorio.unican.es:10902/227842026-06-02T12:39:31Z
dc.title.none.fl_str_mv Characterization of poly(acrylic) acid-modified heterogenous anion exchange membranes with improved monovalent permselectivity for RED
title Characterization of poly(acrylic) acid-modified heterogenous anion exchange membranes with improved monovalent permselectivity for RED
spellingShingle Characterization of poly(acrylic) acid-modified heterogenous anion exchange membranes with improved monovalent permselectivity for RED
Merino García, Iván
Anion exchange membranes
Poly(acrylic) acid modification
Monovalent permselective membranes
Antifouling strategies
Reverse electrodialysis
title_short Characterization of poly(acrylic) acid-modified heterogenous anion exchange membranes with improved monovalent permselectivity for RED
title_full Characterization of poly(acrylic) acid-modified heterogenous anion exchange membranes with improved monovalent permselectivity for RED
title_fullStr Characterization of poly(acrylic) acid-modified heterogenous anion exchange membranes with improved monovalent permselectivity for RED
title_full_unstemmed Characterization of poly(acrylic) acid-modified heterogenous anion exchange membranes with improved monovalent permselectivity for RED
title_sort Characterization of poly(acrylic) acid-modified heterogenous anion exchange membranes with improved monovalent permselectivity for RED
dc.creator.none.fl_str_mv Merino García, Iván
Kotoka, Francis
Portugal, Carla Alexandra Moreira
Crespo, João P. S. Goulão
Velizarov, Svetlozar Gueorguiev
author Merino García, Iván
author_facet Merino García, Iván
Kotoka, Francis
Portugal, Carla Alexandra Moreira
Crespo, João P. S. Goulão
Velizarov, Svetlozar Gueorguiev
author_role author
author2 Kotoka, Francis
Portugal, Carla Alexandra Moreira
Crespo, João P. S. Goulão
Velizarov, Svetlozar Gueorguiev
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Universidad de Cantabria
dc.subject.none.fl_str_mv Anion exchange membranes
Poly(acrylic) acid modification
Monovalent permselective membranes
Antifouling strategies
Reverse electrodialysis
topic Anion exchange membranes
Poly(acrylic) acid modification
Monovalent permselective membranes
Antifouling strategies
Reverse electrodialysis
description The performance of anion-exchange membranes (AEMs) in Reverse Electrodialysis is hampered by both presence of multivalent ions and fouling phenomena, thus leading to reduced net power density. Therefore, we propose a monolayer surface modification procedure to functionalize Ralex-AEMs with poly(acrylic) acid (PAA) in order to (i) render a monovalent permselectivity, and (ii) minimize organic fouling. Membrane surface modification was carried out by putting heterogeneous AEMs in contact with a PAA-based aqueous solution for 24 h. The resulting modified membranes were firstly characterized by contact angle, water uptake, ion exchange capacity, fixed charge density, and swelling degree measurements, whereas their electrochemical responses were evaluated through cyclic voltammetry. Besides, their membrane electro-resistance was also studied via electrochemical impedance spectroscopy analyses. Finally, membrane permselectivity and fouling behavior in the presence of humic acid were evaluated through mass transport experiments using model NaCl containing solutions. The use of modified PAA-AEMs resulted in a significantly enhanced monovalent permselectivity (sulfate rejection improved by >35%) and membrane hydrophilicity (contact angle decreased by >15%) in comparison with the behavior of unmodified Ralex-AEMs, without compromising the membrane electro-resistance after modification, thus demonstrating the technical feasibility of the proposed membrane modification procedure. This study may therefore provide a feasible way for achieving an improved Reverse Electrodialysis process efficiency.
publishDate 2020
dc.date.none.fl_str_mv 2020
2020-06-26
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
NA
http://purl.org/coar/version/c_be7fb7dd8ff6fe43
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10902/22784
url http://hdl.handle.net/10902/22784
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv Membranes, 2020, 10(6), 134
reponame:UCrea Repositorio Abierto de la Universidad de Cantabria
instname:Universidad de Cantabria (UC)
instname_str Universidad de Cantabria (UC)
reponame_str UCrea Repositorio Abierto de la Universidad de Cantabria
collection UCrea Repositorio Abierto de la Universidad de Cantabria
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869417859488153600
score 15,301603

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