Experimental Modeling of Technetium(VII) Recovery from Raffinates after Extractive Reprocessing of Spent Nuclear Fuel
| Autor: | K. N. Dvoeglazov, A. M. Safiulina, A. V. Lizunov, A. V. Anan’ev, M. V. Logunov, M. Tuiza |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Materials science Aqueous solution Materials Science (miscellaneous) Extraction (chemistry) Analytical chemistry Raffinate Diluent Inorganic Chemistry Hydrocarbon chemistry Product (mathematics) Phase (matter) Content (measure theory) Physical and Theoretical Chemistry |
| Zdroj: | Russian Journal of Inorganic Chemistry. 65:1928-1934 |
| ISSN: | 1531-8613 0036-0236 |
| DOI: | 10.1134/s0036023620120141 |
| Popis: | Experimental justification has been provided for the possibility of extractive isolation of technetium from raffinate of technical process of affinage of uranium–plutonium product resulting from hydrometallurgical reprocessing of spent nuclear fuel (SNF). Technetium (VII) from aqueous solution of Zr(IV) (10 g/L) and 4 mol/L HNO3 with small content of ZrOb+ and $${\text{Z}}{{{\text{r}}}_{{\text{2}}}}{\text{O}}_{{\text{3}}}^{{b + }}$$ oxocations is recovered by 80% in 30% TBP in hydrocarbon diluent over seven stages of counter-current continuous cascade at ratio O : A = 1 : 1. Variation in phase flow ratio for cascade part leads to virtually complete Tc(VII) extraction in organic phase over ten stages. Technetium(VII) is selectively back extracted from loaded organic phase with water virtually completely over eleven stages of counter-current continuous cascade. Technological extraction scheme for technetium isolation from SNF solutions has been proposed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink