Application of fluorinated solvents for cesium ion extraction from aqueous solution by D2EHPA. Issue 18 (11th December 2020)

• Record Type: Journal Article
• Authors: Tajima, Hideo; Ui, Hiroki; Minagawa, Mai; Suzuki, Motoshi; Kikuchi, Aoi; Nanba, Shou-ichi; Taguchi, Youji
• Is Part Of: Separation science and technology. Volume 55:Issue 18(2020)
• Page Start: 3386
• Page End: 3401
• Publication Date: 2020-12-11
• Subjects: Fluorinated solvent -- extraction -- cesium removal -- D2EHPA; Separation (Technology) -- Periodicals; 660.284205
• DOI: 10.1080/01496395.2019.1705345
• Languages: English
• ISSNs: 0149-6395

Abstract

ABSTRACT: This study focuses on the application of fluorinated solvents, HCFC-225 and HFE347pc-f, for cesium removal and volume reduction of cesium-containing solutions in solvent extraction. The fluorinated solvents extracted cesium ions very well with Bis(2-ethylhexyl) phosphoric acid (D2EHPA) in comparison with a conventional solvent, cyclohexane. The extraction mechanism corresponded to the well-known metal ion extraction process of D2EHPA. By optimizing the solution volume ratio of D2EHPA–containing fluorinated solvent to aqueous solution and performing multiple extractions, over 90% cesium removal was achieved. Because fluorinated solvents can be distilled easily, cesium removal and volume reduction of cesium-containing materials can be achieved simultaneously.