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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

Wilden, Andreas ; Schneider, Dimitri; Paparigas, Zaina; Henkes, Maximilian; Kreft, Fabian; Geist, Andreas ORCID iD icon 1; Mossini, Eros; Macerata, Elena; Mariani, Mario; Gullo, Maria Chiara; Casnati, Alessandro; Modolo, Giuseppe
1 Institut für Nukleare Entsorgung (INE), Karlsruher Institut für Technologie (KIT)

Abstract:

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 ≥4000). Only a slight contamination with Zr and Ru was observed. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000146276
Veröffentlicht am 22.04.2023
Originalveröffentlichung
DOI: 10.1515/ract-2022-0014
Scopus
Zitationen: 8
Web of Science
Zitationen: 7
Dimensions
Zitationen: 7
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Nukleare Entsorgung (INE)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2022
Sprache Englisch
Identifikator ISSN: 0033-8230, 2193-3405
KITopen-ID: 1000146276
HGF-Programm 32.11.03 (POF IV, LK 01) Fundamental Scientific Aspects
Erschienen in Radiochimica Acta
Verlag De Gruyter
Band 110
Heft 6-9
Seiten 515–525
Vorab online veröffentlicht am 21.04.2022
Schlagwörter actinide separation; CHON; innovative-SANEX; PyTri-Diol; TODGA
Nachgewiesen in Web of Science
Dimensions
Scopus
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