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Functional stability of novel homogeneous and heterogeneous cation exchange membranes for abiotic and microbial electrochemical technologies
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SYSNO ASEP 0558514 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Functional stability of novel homogeneous and heterogeneous cation exchange membranes for abiotic and microbial electrochemical technologies Author(s) Koók, L. (HU)
Rosa, L. F. M. (DE)
Harnisch, F. (DE)
Žitka, Jan (UMCH-V) RID
Otmar, Miroslav (UMCH-V) RID, ORCID
Nemestóthy, N. (HU)
Bakonyi, P. (HU)
Kretzschmar, J. (DE)Article number 120705 Source Title Journal of Membrane Science. - : Elsevier - ISSN 0376-7388
Roč. 658, 15 September (2022)Number of pages 18 s. Language eng - English Country NL - Netherlands Keywords cation exchange membrane ; functional stability ; microbial electrolysis cell Subject RIV CD - Macromolecular Chemistry OECD category Polymer science Method of publishing Limited access Institutional support UMCH-V - RVO:61389013 UT WOS 000822729700002 EID SCOPUS 85132534294 DOI 10.1016/j.memsci.2022.120705 Annotation Two novel cation exchange membranes (CEM) denoted as PSEBS SU and CF22R14 were examined for two electrochemical applications, and compared to a commercial membrane (Fumasep FKE). Application in microbial electrolysis cells (MEC) and abiotic electrochemical cells (EC) were selected as low and high current density systems (∼1 A m−2 and 50 A m−2, respectively). Hydration number (λ), ion exchange capacity (IEC) and ionic conductivity (σ), as well as changes in these parameters during 10 days of operation were studied. λ was stable after MEC operation, however EC mode caused remarkable changes and a decrease of λ (by −8.2 ± 0.3, −13.8 ± 0.8 and −39.3 ± 8.8% for FKE, PSEBS SU and CF22R14, respectively). The decrease of IEC was significant for each membrane regardless of the operation mode. However, only MEC operation led to reversible functionality losses, whereas EC mode caused permanent decrease of IEC (87.9 ± 2.8, 85.3 ± 3.8 and 46.6 ± 4.4% re-activation efficiency for FKE, PSEBS SU and CF22R14, respectively). The EC operation resulted in more severe loss of σ for each CEM, among which PSEBS SU showed the best re-activation efficiency (74.9 ± 8.1%). In general, the membrane properties were much more impaired during EC operation due to higher current densities. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2023 Electronic address https://www.sciencedirect.com/science/article/pii/S0376738822004501?via%3Dihub
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