| Autor: |
Wilden, Andreas, Modolo, Giuseppe, Kreft, Fabian, Schneider, Dimitri, Paparigas, Zaina, Lumetta, Gregg J., Gelis, Artem V., Law, Jack D., Geist, Andreas |
| Jazyk: |
angličtina |
| Rok vydání: |
2021 |
| Zdroj: |
Actinide Separations Conference 2021, ASC2021, Online, USA, 2021-05-18-2021-05-20 |
| Popis: |
An ALSEP process demonstration test for the separation of trivalent actinides from spikedsimulated high active raffinate solution was run in a 32-stage 1 cm annular centrifugalcontactor setup. The solvent consisted of 0.5 mol L−1 HEH[EHP] and 0.05 mol L−1 T2EHDGAin n-dodecane. A flow sheet was calculated with the AMUSE code using single stage distributiondata, taking into account the constraint of the available number of 16 centrifugalcontactors. The co-extraction of Zr(IV) and Pd(II) was efficiently prevented using 0.05 molL−1 CDTA as a masking agent. Co-extracted Mo was scrubbed using 0.75 mol L−1 AHA and0.175 mol L−1 ammonium citrate at pH 3. The separation of An(III) from Ln(III) was achievedusing 0.015 mol L−1 DTPA and 0.2 mol L−1 ammonium citrate at pH 2. Finally, Ln(III) wereefficiently back extracted using 0.2 mol L−1 TEDGA in 0.5 mol L−1 HNO3.A fairly clean An(III) product was obtained with a recovery of 95% Am(III) + Cm (III). TheLn(III) were efficiently stripped by the hydrophilic TEDGA complexant, but the Ln(III)product contained 5% of co-stripped An(III). The carryover of An(III) into the Ln(III)product is attributed to too few actinide stripping stages, which was constrained by theavailable number of contactors.The results of the demonstration test will be presented and discussed. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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