Cs extraction from chloride media by calixarene crown-ethers

• Verfasst von: Simonnet, Marie [VerfasserIn]
• Verfasst von: Sittel, Thomas [VerfasserIn]
• Verfasst von: Weßling, Patrik [VerfasserIn]
• Verfasst von: Geist, Andreas [VerfasserIn]
• Titel: Cs extraction from chloride media by calixarene crown-ethers
• Verf.angabe: Marie Simonnet, Thomas Sittel, Patrik Weßling and Andreas Geist
• E-Jahr: 2022
• Jahr: 19 October 2022
• Umfang: 10 S.
• Fussnoten: Gesehen am 13.01.2023
• Titel Quelle: Enthalten in: Energies
• Ort Quelle: Basel : MDPI, 2008
• Jahr Quelle: 2022
• Band/Heft Quelle: 15(2022), 20, Artikel-ID 7724, Seite 1-10
• ISSN Quelle: 1996-1073
• DOI: doi:10.3390/en15207724
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Asse II salt mine
• Sach-SW: calixarene-crown-ether
• Sach-SW: cesium
• Sach-SW: chloride media
• Sach-SW: decontamination
• Sach-SW: extraction
• Sach-SW: radioactive waste
• K10plus-PPN: 1831057824

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 137Cs 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.