Separation of cobalt and nickel by liquid surfactant membranes containing a synthesized cationic surfactant

Takahiko Kakoi, Tsuyoshi Ura, Henry Kasaini, Masahiro Goto, Fumiyuki Nakashio

    研究成果: Contribution to journalArticle査読

    17 被引用数 (Scopus)

    抄録

    Separation of cobalt(II) and nickel(II) by using a hydroxyoxime extractant has been investigated both in liquid-liquid extraction and in a liquid surfactant membrane (LSM) system. In the liquid-liquid equilibrium extraction studies, hydroxyoximes showed significant extractability for nickel ions, although LIX 84 was found to have exceptional chelating affinity for nickel ions. In the LSM system functionalized by hydroxyoxime, the cobalt ions were efficiently separated from nickel ions as a result of slower permeation of nickel chelates across the emulsion membrane. More complete cobalt recovery was achieved in the LSMs does with LIX 860 than when the same carrier was applied to the liquid-liquid extraction system. Furthermore, cobalt permeation rate was enhanced threefold when a quaternary ammonium type of cationic surfactant was used as an emulsifier due to carrier interaction with surfactant at the reaction interface. The permeation mechanism of ions in LSMs was elucidated by an interfacial reaction model which took into account the adsorption of the carrier and surfactant at the reaction interface.

    本文言語英語
    ページ(範囲)1163-1180
    ページ数18
    ジャーナルSeparation Science and Technology
    33
    8
    DOI
    出版ステータス出版済み - 1998

    All Science Journal Classification (ASJC) codes

    • 化学 (全般)
    • 化学工学(全般)
    • プロセス化学およびプロセス工学
    • ろ過および分離

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