Solvent extraction of selenium in nitric acid: evaluation of multiple extractants and proposal of a novel separation process

Solvent extraction behaviors of Se (VI) from nitric acid solutions were investigated with multiple extractants used for uranium, plutonium, minor actinides, and rare earth elements separation processes from high-level liquid waste. During the processes, Se remained in the residual aqueous solutions,...

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Published inJournal of radioanalytical and nuclear chemistry Vol. 333; no. 10; pp. 5183 - 5189
Main Authors Ito, K. T. M., Kawakami, T., Kato, C., Fukutani, S., Matsumura, T., Fujii, T.
Format Journal Article
LanguageEnglish
Published Cham Springer International Publishing 01.10.2024
Springer Nature B.V
Subjects
Actinides
Aqueous solutions
Chemistry
Chemistry and Materials Science
Diagnostic Radiology
Hadrons
Heavy Ions
Inorganic Chemistry
Liquid wastes
Nitric acid
Nuclear Chemistry
Nuclear Physics
Octanol
Phenylenediamine
Physical Chemistry
Plutonium
Rare earth elements
Selenium
Separation
Solvent extraction
Phenylenediamine
Selenium-79
Selenium
Solvent extraction
Octanol
Nitric acid
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Summary:Solvent extraction behaviors of Se (VI) from nitric acid solutions were investigated with multiple extractants used for uranium, plutonium, minor actinides, and rare earth elements separation processes from high-level liquid waste. During the processes, Se remained in the residual aqueous solutions, as all extractants showed distribution ratios < 1. In contrast, Se showed distribution ratios > 1 with o -phenylenediamine in dilute nitric acid (< 2 M HNO 3 ), octanol as the organic phase, and concentrated nitric acid (8 M HNO 3 ) for back extraction, suggesting a potential new single separation process and recovery of Se.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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ISSN:0236-5731
1588-2780
DOI:10.1007/s10967-024-09681-6