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Solvent Extraction of Technetium(VII) and Rhenium(VII) Using a Hexaoctylnitrilotriacetamide Extractant

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Abstract

Liquid-liquid extraction for the removal of pertechnetate (99TcO4–) and perrhenate (ReO4–) is reported based on using the tripodal extractant N,NN’,N’,N“,N”-hexa-n-octylnitrilotriacetamide (HONTA) composed of three amide groups and a tertiary amine. The extraction behaviors were compared with those using alkyldiamideamines (ADAAM(Oct) and ADAAM(EH)), and the commercial amine-type extractant, trioctylamine (TOA). HONTA quantitatively extracted 99TcO4- and ReO4–in the pH range from 1.0 to 2.5 by the co-extraction of protons. The extraction performance of the extractants was improved in the order of HONTA > ADAAM(Oct) > ADAAM(EH) > TOA. 99TcO4–and ReO4–in the extracting phase were successfully stripped using neutral aqueous solutions as the receiving phase, and the extraction ability of HONTA was maintained after five repeated uses.

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Acknowledgements

This work was supported by the Japan Society for the Promotion of Science (JSPS) KAKENHI Grant Number JP19K05340 (to K. S.). We thank Enago (https://www.enago.com/) for providing language-editing services.

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Authors and Affiliations

  1. Materials Sciences Research Center, Japan Atomic Energy Agency (JAEA), 1-1-1 Koto, Sayo-cho, Sayo-gun, Hyogo, 679-5148, Japan

    Kojiro Shimojo, Keiichi Yokoyama & Tsuyoshi Yaita

  2. Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Bautzner Landstraße 400, Dresden, 01328, Germany

    Kojiro Shimojo & Atsushi Ikeda-Ohno

  3. Nuclear Science and Engineering Center, Japan Atomic Energy Agency (JAEA), 2-4 Shirakata, Tokai-mura, Ibaraki, 319-1195, Japan

    Hideya Suzuki

Authors
  1. Kojiro Shimojo
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  2. Hideya Suzuki
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  3. Keiichi Yokoyama
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  4. Tsuyoshi Yaita
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  5. Atsushi Ikeda-Ohno
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Correspondence to Kojiro Shimojo.

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Shimojo, K., Suzuki, H., Yokoyama, K. et al. Solvent Extraction of Technetium(VII) and Rhenium(VII) Using a Hexaoctylnitrilotriacetamide Extractant. ANAL. SCI. 36, 1435–1437 (2020). https://doi.org/10.2116/analsci.20C014

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  • DOI: https://doi.org/10.2116/analsci.20C014

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