Selective extraction of Cs(I) using 1,3-[(2,4-diethylheptylethoxy)oxy]-2,4-crown-6-calix[4]arene in ionic liquid solvents and its application to the treatment of high-level liquid waste

Tadayuki Takahashi; Tatsuya Ito; Seong Yun Kim

doi:10.1007/s10967-018-5876-3

Selective extraction of Cs(I) using 1,3-[(2,4-diethylheptylethoxy)oxy]-2,4-crown-6-calix[4]arene in ionic liquid solvents and its application to the treatment of high-level liquid waste

Tadayuki Takahashi, Tatsuya Ito, Seong Yun Kim

ENG - Quantum Science and Energy Engineering

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

To separate heat-generating Cs from high-level liquid waste (HLLW), the extraction of Cs(I) using 1,3-[(2,4-diethylheptylethoxy)oxy]-2,4-crown-6-calix[4]arene (calix[4]arene-R14) in combination with 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide) ionic liquids ([C_nmim][NTf₂], where n = 2, 4, and 6) was investigated. Under moderately acidic conditions, the calix[4]arene-R14/[C_nmim][NTf₂] system showed a higher extraction efficiency (E_Cs) than that exhibited by the conventional calix[4]arene-R14/dichloromethane system. All extraction processes reached equilibrium within 5 min. Slope analysis revealed that the Cs:calix[4]arene-R14 inclusion complex has a 1:1 stoichiometry. The extraction was found to be exothermic and influenced by the presence of Na(I). These extraction systems exhibited high efficiency and selectivity for Cs(I) in simulated HLLW.

Original language	English
Pages (from-to)	1067-1073
Number of pages	7
Journal	Journal of Radioanalytical and Nuclear Chemistry
Volume	316
Issue number	3
DOIs	https://doi.org/10.1007/s10967-018-5876-3
Publication status	Published - 2018 Jun 1

Keywords

Calix-crown
Cesium
High-level liquid waste
Ionic liquid
Solvent extraction

ASJC Scopus subject areas

Analytical Chemistry
Nuclear Energy and Engineering
Radiology Nuclear Medicine and imaging
Pollution
Spectroscopy
Public Health, Environmental and Occupational Health
Health, Toxicology and Mutagenesis

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1007/s10967-018-5876-3

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Selective extraction of Cs(I) using 1,3-[(2,4-diethylheptylethoxy)oxy]-2,4-crown-6-calix[4]arene in ionic liquid solvents and its application to the treatment of high-level liquid waste. / Takahashi, Tadayuki; Ito, Tatsuya; Kim, Seong Yun.

In: Journal of Radioanalytical and Nuclear Chemistry, Vol. 316, No. 3, 01.06.2018, p. 1067-1073.

Research output: Contribution to journal › Article › peer-review

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title = "Selective extraction of Cs(I) using 1,3-[(2,4-diethylheptylethoxy)oxy]-2,4-crown-6-calix[4]arene in ionic liquid solvents and its application to the treatment of high-level liquid waste",

abstract = "To separate heat-generating Cs from high-level liquid waste (HLLW), the extraction of Cs(I) using 1,3-[(2,4-diethylheptylethoxy)oxy]-2,4-crown-6-calix[4]arene (calix[4]arene-R14) in combination with 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide) ionic liquids ([Cnmim][NTf2], where n = 2, 4, and 6) was investigated. Under moderately acidic conditions, the calix[4]arene-R14/[Cnmim][NTf2] system showed a higher extraction efficiency (ECs) than that exhibited by the conventional calix[4]arene-R14/dichloromethane system. All extraction processes reached equilibrium within 5 min. Slope analysis revealed that the Cs:calix[4]arene-R14 inclusion complex has a 1:1 stoichiometry. The extraction was found to be exothermic and influenced by the presence of Na(I). These extraction systems exhibited high efficiency and selectivity for Cs(I) in simulated HLLW.",

keywords = "Calix-crown, Cesium, High-level liquid waste, Ionic liquid, Solvent extraction",

author = "Tadayuki Takahashi and Tatsuya Ito and Kim, {Seong Yun}",

note = "Funding Information: Acknowledgements This work was supported by JSPS KAKENHI Grant Number 16H02444. Publisher Copyright: {\textcopyright} 2018, Akad{\'e}miai Kiad{\'o}, Budapest, Hungary.",

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AU - Kim, Seong Yun

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AB - To separate heat-generating Cs from high-level liquid waste (HLLW), the extraction of Cs(I) using 1,3-[(2,4-diethylheptylethoxy)oxy]-2,4-crown-6-calix[4]arene (calix[4]arene-R14) in combination with 1-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide) ionic liquids ([Cnmim][NTf2], where n = 2, 4, and 6) was investigated. Under moderately acidic conditions, the calix[4]arene-R14/[Cnmim][NTf2] system showed a higher extraction efficiency (ECs) than that exhibited by the conventional calix[4]arene-R14/dichloromethane system. All extraction processes reached equilibrium within 5 min. Slope analysis revealed that the Cs:calix[4]arene-R14 inclusion complex has a 1:1 stoichiometry. The extraction was found to be exothermic and influenced by the presence of Na(I). These extraction systems exhibited high efficiency and selectivity for Cs(I) in simulated HLLW.

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Selective extraction of Cs(I) using 1,3-[(2,4-diethylheptylethoxy)oxy]-2,4-crown-6-calix[4]arene in ionic liquid solvents and its application to the treatment of high-level liquid waste

Abstract

Keywords

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