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Cs Extraction from Chloride Media by Calixarene Crown-Ethers

Author

Listed:
  • Marie Simonnet

    (Japan Atomic Energy Agency, Materials Sciences Research Center, Tokai-mura 319-1195, Ibaraki-ken, Japan)

  • Thomas Sittel

    (Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), 76021 Karlsruhe, Germany)

  • Patrik Weßling

    (Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), 76021 Karlsruhe, Germany
    Heidelberg University, Institute for Physical Chemistry, 69120 Heidelberg, Germany)

  • Andreas Geist

    (Karlsruhe Institute of Technology (KIT), Institute for Nuclear Waste Disposal (INE), 76021 Karlsruhe, Germany)

Abstract

Asse II salt mine, in Germany, contains low and intermediate-level radioactive waste that must be retrieved in the upcoming years. Potentially contaminated salts and brines will require treatment, with 137 Cs being the main contaminant. Cs + is problematic to selectively recover due to its chemical similarity with Na + and K + which are present in high quantities in a salt mine. This paper offers a novel solution for Cs + separation from concentrated chloride salt media by solvent extraction with calixarene-crown-ether extractants in an alcoholic diluent. The proposed solvent extracts Cs + at elevated chloride concentrations (3–4 M) while back-extraction is achieved by contacting the solvent with dilute (0.01 M) hydrochloric acid.

Suggested Citation

  • Marie Simonnet & Thomas Sittel & Patrik Weßling & Andreas Geist, 2022. "Cs Extraction from Chloride Media by Calixarene Crown-Ethers," Energies, MDPI, vol. 15(20), pages 1-10, October.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:20:p:7724-:d:947118
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