Precise Cation Separations with Composite Cation-Exchange Membranes: Role of Base Layer Properties

Simple item page
dc.citation.firstpage6331
dc.citation.issueNumber15
dc.citation.journalTitleEnvironmental Science & Technology
dc.citation.lastpage6341
dc.citation.volumeNumber57
dc.contributor.authorDuChanois, Ryan M.
dc.contributor.authorMazurowski, Lauren
dc.contributor.authorFan, Hanqing
dc.contributor.authorVerduzco, Rafael
dc.contributor.authorNir, Oded
dc.contributor.authorElimelech, Menachem
dc.contributor.orgNanosystems Engineering Research Center for Nanotechnology-Enabled Water Treatment (NEWT)
dc.date.accessioned2023-05-02T18:37:01Z
dc.date.available2023-05-02T18:37:01Z
dc.date.issued2023
dc.description.abstractSeparation of specific ions from water could enable recovery and reuse of essential metals and nutrients, but established membrane technologies lack the high-precision selectivity needed to facilitate a circular resource economy. In this work, we investigate whether the cation/cation selectivity of a composite cation-exchange membrane (CEM), or a thin polymer selective layer on top of a CEM, may be limited by the mass transfer resistance of the underlying CEM. In our analysis, we utilize a layer-by-layer technique to modify CEMs with a thin polymer selective layer (∼50 nm) that has previously shown high selectivity toward copper over similarly sized metals. While these composite membranes have a CuCl2/MgCl2 selectivity up to 33 times larger than unmodified CEMs in diffusion dialysis, our estimates suggest that eliminating resistance from the underlying CEM could further increase selectivity twofold. In contrast, the CEM base layer has a smaller effect on the selectivity of these composite membranes in electrodialysis, although these effects could become more pronounced for ultrathin or highly conductive selective layers. Our results highlight that base layer resistance prevents selectivity factors from being comparable across diffusion dialysis and electrodialysis, and CEMs with low resistance are necessary for providing highly precise separations with composite CEMs.
dc.identifier.citationDuChanois, Ryan M., Mazurowski, Lauren, Fan, Hanqing, et al.. "Precise Cation Separations with Composite Cation-Exchange Membranes: Role of Base Layer Properties." <i>Environmental Science & Technology,</i> 57, no. 15 (2023) American Chemical Society: 6331-6341. https://doi.org/10.1021/acs.est.3c00445.
dc.identifier.doihttps://doi.org/10.1021/acs.est.3c00445
dc.identifier.urihttps://hdl.handle.net/1911/114869
dc.language.isoeng
dc.publisherAmerican Chemical Society
dc.rightsThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by the American Chemical Society.
dc.titlePrecise Cation Separations with Composite Cation-Exchange Membranes: Role of Base Layer Properties
dc.typeJournal article
dc.type.dcmiText
dc.type.publicationpost-print
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Manuscript_Draft_11-22-2022.pdf
Size:
816.78 KB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Faculty Publications
Chemical and Biomolecular Engineering Publications
Materials Science and NanoEngineering Publications