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Investigation on the extraction of strontium ions from aqueous phase using crown ether-ionic liquid systems

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Abstract

The extraction of strontium ions using DCH18C6 as the extractant and various ionic liquids (ILs) as solvents has been investigated. The distribution ratio of Sr2+ can reach as high as 103 under certain conditions, much larger than that in DCH18C6/n-octanol system. The extraction capacity depends greatly on the structure of ionic liquids. In IIs-based extraction systems, the extraction efficiency of strontium ions is reduced by increasing the concentration of nitric acid and can also be influenced directly by the presence of Na+ and K+ in the aqueous phase. It is confirmed that the extraction proceeds mainly via a cation-exchange mechanism.

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Authors and Affiliations

  1. Department of Applied Chemistry, College of Chemistry and Molecular Engineering, Beijing National Laboratory for Molecular Sciences (BNLMS), Peking University, Beijing, 100871, China

    Chao Xu, XingHai Shen, QingDe Chen & HongCheng Gao

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  1. Chao Xu
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  2. XingHai Shen
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  3. QingDe Chen
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  4. HongCheng Gao
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Correspondence to XingHai Shen.

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Supported by the National Natural Science Foundation of China (Grant No. 20871009).

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Xu, C., Shen, X., Chen, Q. et al. Investigation on the extraction of strontium ions from aqueous phase using crown ether-ionic liquid systems. Sci. China Ser. B-Chem. 52, 1858–1864 (2009). https://doi.org/10.1007/s11426-009-0268-8

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  • DOI: https://doi.org/10.1007/s11426-009-0268-8

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