TY  - JOUR
AU  - Wilden, Andreas
AU  - Schneider, Dimitri
AU  - Paparigas, Zaina
AU  - Henkes, Maximilian
AU  - Kreft, Fabian
AU  - Geist, Andreas
AU  - Mossini, Eros
AU  - Macerata, Elena
AU  - Mariani, Mario
AU  - Gullo, Maria Chiara
AU  - Casnati, Alessandro
AU  - Modolo, Giuseppe
TI  - Selective actinide(III) separation using 2,6-bis[1-(propan-1-ol)-1,2,3-triazol-4-yl]pyridine (PyTri-Diol) in the innovative-SANEX process: laboratory scale counter current centrifugal contactor demonstration
JO  - Radiochimica acta
VL  -  
SN  - 0033-8230
CY  - Berlin
PB  - ˜Deœ Gruyter
M1  - FZJ-2022-01349
SP  - 21 p.
PY  - 2022
AB  - An innovative-SANEX process for the selective separation of the trivalent actinides americium and curium from a simulated PUREX raffinate solution was successfully demonstrated on the laboratory scale using a 16-stage 1 cm annular centrifugal contactor setup. The solvent was composed of 0.2 mol L−1 N,N,N',N'-tetra-n-octyl-diglycolamide (TODGA) and 5% v/v 1-octanol in a kerosene diluent. Zr(IV) and Pd(II) co-extraction was prevented using trans-1,2-diaminocyclohexane-N,N,N',N'-tetraacetic acid (CDTA) as a masking agent in the feed. The actinide(III) selective back-extraction was achieved using 2,6-bis[1-(propan-1-ol)-1,2,3-triazol-4-yl]pyridine (PyTri-Diol) in 0.45 mol L−1 HNO3 as a CHON alternative to the sulfur-containing stripping agent used in a previous version of the innovative-SANEX process. The new process described in this paper showed excellent performance for the recovery of An(III). An An(III) product with a quasi-quantitative recovery of americium and curium (≥99.9%) and very good separation from fission and activation products was obtained (decontamination factors ≥4,000). Only a slight contamination with Zr and Ru was observed. This test demonstrates the successful use of molecules containing only carbon, hydrogen, oxygen, and nitrogen atoms (so-called CHON molecules) for the selective separation of An(III) from a simulated PUREX raffinate solution. By avoiding sulfur- or phosphorous-containing molecules, the generation of secondary radioactive waste during process operation can be reduced drastically.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000784344500001
DO  - DOI:10.1515/ract-2022-0014
UR  - https://juser.fz-juelich.de/record/906294
ER  -