Selective transport of scandium(III) across polymer inclusion membranes with improved stability which contain an amic acid carrier

Wataru Yoshida, Yuzo Baba, Fukiko Kubota, Spas D. Kolev, Masahiro Goto

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    23 Citations (Scopus)

    Abstract

    This paper reports on the development of a polymer inclusion membrane (PIM) for the selective separation of Sc(III) from other REM ions. A comparison is made of the performance of cellulose triacetate (CTA) based PIMs containing 2-thenoyltrifluoroacetone (HTTA), 2-ethylhexylphosphoric acid mono-2-ethylhexyl ester (PC-88A), N-[N,N-di(2-ethylhexyl) aminocarbonylmethyl]glycine (D2EHAG) or N-[N,N-di(2-ethylhexyl)aminocarbonylmethyl]phenylalanine (D2EHAF) as the carrier in the extraction of Sc(III) from its sulfuric acid/ammonium sulfate buffer solutions. The potential of the PIM containing D2EHAF for the selective separation of Sc(III) from a feed solution containing similar concentrations of Y(III), La(III), Nd(III), and Dy(III) into a 0.5 mol L−1 sulfuric acid receiving solution has been demonstrated. In addition, the newly developed PIM containing D2EHAF exhibited excellent stability in 5 cycles of extraction and back-extraction of Sc(III) with insignificant deterioration in its performance. The results obtained in this study indicate that the molecular structure of the carrier has a strong influence on membrane stability, and that the introduction of a phenyl group into the carrier molecule results in a significant stability improvement.

    Original languageEnglish
    Pages (from-to)291-299
    Number of pages9
    JournalJournal of Membrane Science
    Volume572
    DOIs
    Publication statusPublished - Feb 15 2019

    All Science Journal Classification (ASJC) codes

    • Biochemistry
    • Materials Science(all)
    • Physical and Theoretical Chemistry
    • Filtration and Separation

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