Removal of rare earth fission products from LiCl–KCl molten salt by sulfide precipitation

The precipitation reaction of rare earth was investigated by potassium sulfide (K 2 S), or sodium sulfide hydrate (Na 2 S·xH 2 O) in LiCl–KCl melts. The characteristics of precipitates were determined and the removal ratios of rare earth were compared under different conditions. For both precipitant...

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Bibliographic Details
Published inJournal of radioanalytical and nuclear chemistry Vol. 331; no. 9; pp. 4011 - 4019
Main Authors Qu, Yaxin, Cheng, Ming, Luo, Yan, Niu, Yongsheng, Fu, Haiying, Dou, Qiang
Format Journal Article
LanguageEnglish
Published Cham Springer International Publishing 01.09.2022
Springer
Springer Nature B.V
Subjects
Chemical precipitation
Chemistry
Chemistry and Materials Science
Diagnostic Radiology
Earth
Energy minerals
Fission products
Fossil fuels
Hadrons
Halides
Heavy Ions
Inorganic Chemistry
Lithium chloride
Molten salts
Nuclear Chemistry
Nuclear energy
Nuclear industry
Nuclear Physics
Physical Chemistry
Potassium chloride
Precipitates
Sodium sulfide
Spent reactor fuels
Sulfides
Synergistic effect
Removal
Precipitation
Rare earth
Chloride molten salt
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Summary:The precipitation reaction of rare earth was investigated by potassium sulfide (K 2 S), or sodium sulfide hydrate (Na 2 S·xH 2 O) in LiCl–KCl melts. The characteristics of precipitates were determined and the removal ratios of rare earth were compared under different conditions. For both precipitants, the rare earth removal ratios were up to 90%. Rare earth sulfides were mainly observed in K 2 S precipitation reaction, while some oxysulfide species were identified for Na 2 S·xH 2 O, which showed the synergistic effect of S and O on the removal efficiency. The research results suggested that sulfide precipitation was feasible to separate rare earth products from waste salts.
ISSN:0236-5731
1588-2780
DOI:10.1007/s10967-022-08436-5