Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/161959
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dc.contributor.authorLiu, Hongen_US
dc.contributor.authorShe, Qianhongen_US
dc.date.accessioned2022-09-27T06:53:20Z-
dc.date.available2022-09-27T06:53:20Z-
dc.date.issued2022-
dc.identifier.citationLiu, H. & She, Q. (2022). Influence of membrane structure-dependent water transport on conductivity-permselectivity trade-off and salt/water selectivity in electrodialysis: implications for osmotic electrodialysis using porous ion exchange membranes. Journal of Membrane Science, 650, 120398-. https://dx.doi.org/10.1016/j.memsci.2022.120398en_US
dc.identifier.issn0376-7388en_US
dc.identifier.urihttps://hdl.handle.net/10356/161959-
dc.description.abstractWater transport, including osmosis and electroosmosis, is an important phenomenon in electrodialysis (ED) but is generally ignored in many studies on the analysis of ion transport. Having a fundamental understanding of the influence of water transport on ion transport during ED is of particular help for the optimization of the design of ion exchange membranes (IEMs) and the development of novel ED-related processes. In this study we systematically investigated the effect of membrane structure-dependent water transport on ED performance and explored the potential of using porous IEMs in ED. A 1-D model, which is based on the extended Nernst–Planck equation and duly considers the membrane structure-dependent water flux, was developed to analyze mass (ion and water) transport in IEMs during ED. Results show that the electroosmotic flux increased with increasing the water volume fraction and the pore size of IEMs and decreasing the thickness of IEMs, which further leads to the increase in counterion flux and the decrease in co-ion flux. Osmotic water flux exhibited a similar trend to electroosmotic flux with changing membrane structural properties. The existence of osmotic water transport further enhanced the change of counterion and co-ion fluxes, which leads to the increase in both membrane conductivity and permselectivity. This suggests that osmotic water transport can break the trade-off between conductivity and permselectivity of IEMs during ED. On the other hand, osmotic water transport leads to the decrease in specific salt flux (i.e., the ratio of salt flux over water flux) despite the increase in salt flux, suggesting the decrease in salt/water selectivity. The effect of osmotic water transport is more significant for porous IEMs due to higher osmotic water flux compared to dense IEMs. This work provides new insights into the use of porous IEMs in osmotic electrodialysis for potential applications.en_US
dc.description.sponsorshipMinistry of Education (MOE)en_US
dc.language.isoenen_US
dc.relationRG84/19en_US
dc.relation.ispartofJournal of Membrane Scienceen_US
dc.rights© 2022 Elsevier B.V. All rights reserved.en_US
dc.subjectEngineering::Environmental engineeringen_US
dc.titleInfluence of membrane structure-dependent water transport on conductivity-permselectivity trade-off and salt/water selectivity in electrodialysis: implications for osmotic electrodialysis using porous ion exchange membranesen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Civil and Environmental Engineeringen_US
dc.contributor.researchNanyang Environment and Water Research Instituteen_US
dc.contributor.researchSingapore Membrane Technology Centreen_US
dc.identifier.doi10.1016/j.memsci.2022.120398-
dc.identifier.scopus2-s2.0-85125655086-
dc.identifier.volume650en_US
dc.identifier.spage120398en_US
dc.subject.keywordsIon-Exchange Membraneen_US
dc.subject.keywordsElectrodialysisen_US
dc.description.acknowledgementThis research was supported by the Ministry of Education, Singapore, under the Academic Research Fund Tier 1 (RG84/19).en_US
item.grantfulltextnone-
item.fulltextNo Fulltext-
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