Transport of Rhodium(III) from Chloride Media across a Polymer Inclusion Membrane Containing an Ionic Liquid Metal Ion Carrier
AuthorHanada, T; Firmansyah, ML; Yoshida, W; Kubota, F; Kolev, SD; Goto, M
Source TitleACS Omega
PublisherAMER CHEMICAL SOC
University of Melbourne Author/sKolev, Spas
AffiliationSchool of Chemistry
Document TypeJournal Article
CitationsHanada, T., Firmansyah, M. L., Yoshida, W., Kubota, F., Kolev, S. D. & Goto, M. (2020). Transport of Rhodium(III) from Chloride Media across a Polymer Inclusion Membrane Containing an Ionic Liquid Metal Ion Carrier. ACS OMEGA, 5 (22), pp.12989-12995. https://doi.org/10.1021/acsomega.0c00867.
Access StatusAccess this item via the Open Access location
Open Access URLPublished version
Efficient and selective transport of rhodium(III) across a polymer inclusion membrane (PIM) from a 0.1 mol dm-3 HCl feed solution, also containing iron(III), to a receiving solution containing 0.1 mol dm-3 HCl and 4.9 mol dm-3 NH4Cl was achieved using a phosphonium-type ionic liquid, trioctyl(dodecyl)phosphonium chloride (P88812Cl), as the metal ion carrier. The optimum PIM composition for the Rh(III) transport was 50 wt % poly(vinylidene-co-hexafluoropropylene) (PVDF-HFP), 30 wt % P88812Cl, and 20 wt % plasticizer 2-nitrophenyl octyl ether (2NPOE). The driving force for the Rh(III) transport was suggested to be the concentration difference of the chloride ion between the feed and the receiving solutions. More than 70% rhodium(III) could be recovered from the receiving solution, and no transport of iron(III) was observed; however, the two metal ions cannot be separated by liquid-liquid extraction. This is the first report of selective transport of rhodium(III) across a polymer inclusion membrane.
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