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A further understanding of the cation exchange mechanism for the extraction of Sr2+ and Cs+ by ionic liquid

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Abstract

The cation exchange mechanism was further investigated during the extraction of Sr2+ and Cs+ using the extractant dicyclohexano-18-crown-6 (DCH18C6) in an ionic liquid (IL) 1-ethyl-3-methyimidazolium bis[(trifluoromethyl)sulfonyl]imide (C2mimNTf2). The concentrations of both the cation C2mim+ and the anion NTf2 − in aqueous phase were detected. The concentration of NTf2 − in the aqueous phase decreased as Sr2+ or Cs+ exchanged into the IL phase. Addition of C2mim+ or NTf2 − as well as the variation of the solubility of C2mimNTf2 influenced the extraction efficiency of Sr2+ or Cs+.

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Authors and Affiliations

  1. Beijing National Laboratory for Molecular Sciences (BNLMS), Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, China

    TaoXiang Sun, XingHai Shen & QingDe Chen

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  1. TaoXiang Sun
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  2. XingHai Shen
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Correspondence to XingHai Shen.

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Sun, T., Shen, X. & Chen, Q. A further understanding of the cation exchange mechanism for the extraction of Sr2+ and Cs+ by ionic liquid. Sci. China Chem. 56, 782–788 (2013). https://doi.org/10.1007/s11426-013-4859-z

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  • DOI: https://doi.org/10.1007/s11426-013-4859-z

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