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Adsorption and separation behavior of strontium and yttrium using a silica-based CMPO adsorbent

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Abstract

To separate Y(III) from a Sr(II)–Y(II) mixture, two silica-based adsorbents, CMPO/SiO2-P and (CMPO + Dodec)/SiO2-P were prepared by impregnating octyl(phenyl)-N,N-diisobutylcarbamoyl methylphosphine oxide (CMPO) extractant and a molecule modifier (1-Dodecanol) into macroporous silica/polymer composite support (SiO2-P). The Adsorbents showed high adsorption affinity to Y(III) and weak adsorption affinity to Sr(II) in HNO3 solution. The amount of adsorbed Y(III) increased with the HNO3 in the solution. The amount of adsorbed Y(III) increased with contact time and reached equilibrium within 30 min. The results showed that a pseudo-second-order kinetic model with a high correlation coefficient described the adsorption process better than other kinetic models. Successful Y(III) separation from Sr(II)–Y(III) mixture in HNO3 solution was achieved.

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Acknowledgements

This work was supported by JSPS KAKENHI Grant Number 16H02444.

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Authors and Affiliations

  1. Department of Quantum Science and Energy Engineering, Graduate School of Engineering, Tohoku University, 6-6-01-2 Aza-Aoba-Aramaki, Aoba-ku, Sendai, Miyagi, 980-8579, Japan

    Taiga Kawamura, Tatsuya Ito & Seong-Yun Kim

  2. Japan Nuclear Fuel Limited, 4-108 Aza-Okitsuke, Oaza Obuchi, Rokkasho-mura, Kamikita-gun, Aomori, 039-3212, Japan

    Taiga Kawamura

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  1. Taiga Kawamura
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  2. Tatsuya Ito
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  3. Seong-Yun Kim
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Correspondence to Seong-Yun Kim.

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Kawamura, T., Ito, T. & Kim, SY. Adsorption and separation behavior of strontium and yttrium using a silica-based CMPO adsorbent. J Radioanal Nucl Chem 320, 9–14 (2019). https://doi.org/10.1007/s10967-019-06446-4

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  • DOI: https://doi.org/10.1007/s10967-019-06446-4

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