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Synthesis of task-specific ionic liquids with grafted diglycolamide moiety. Complexation and stripping of lanthanides

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Abstract

Task-specific ionic liquids (TSILs) of a novel class, with the diglycolamide moietity grafted in the alkyl chain of imidazolium cation, were synthesized and characterized. Lanthanide complexation capabilities of TSILs as active components of solid phase extractants were evaluated by studies on the adsorption of lanthanides from aqueous solutions. The TSIL-based solid adsorbents prepared by immobilization of long-alkyl-chain TSILs in siliceous mesostructured cellular foams adsorb trivalent lanthanides. No extraction of lanthanides from aqueous solution into 1-hexyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([C6mim][Nf2T]) was observed at any acidity in the presence of these TSILs in the aqueous phase. This implies that TSILs suppress the extraction of lanthanides by formation of water-soluble complexes. The TSILs added to solvent extraction systems consisting of N,N,N′,N′-tetraoctyl-3-oxapentanediamide (TODGA) in [C6mim][Nf2T] and aqueous HNO3 solutions show very good stripping properties for lanthanides.

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Acknowledgments

This research was supported by the Basic Energy Science Program of the Office of Science, U.S. Department of Energy, under Contract DE-AC05-0096OR22725 with Oak Ridge National Laboratory, managed by UT-Battelle and by the Ph.D. Programs Foundation of Ministry of Education of China (20090211120026).

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Authors and Affiliations

  1. Radiochemistry Laboratory, Lanzhou University, Lanzhou, 730000, People’s Republic of China

    Zhang Youwen, Fan Fuyou, Hu Peizhuo & Shen Yinglin

  2. Energy and Transportation Science Division, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA

    Luo Huimin

  3. Northwest University for Nationalities, Lanzhou, 730000, People’s Republic of China

    Wu Yun

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  1. Wu Yun
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  2. Zhang Youwen
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  3. Fan Fuyou
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  4. Luo Huimin
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  5. Hu Peizhuo
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Correspondence to Shen Yinglin.

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Yun, W., Youwen, Z., Fuyou, F. et al. Synthesis of task-specific ionic liquids with grafted diglycolamide moiety. Complexation and stripping of lanthanides. J Radioanal Nucl Chem 299, 1213–1218 (2014). https://doi.org/10.1007/s10967-013-2878-z

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  • DOI: https://doi.org/10.1007/s10967-013-2878-z

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