Journal Article

FZJ-2020-02466

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Solvent extraction studies for the separation of trivalent actinides from lanthanides with a triazole-functionalized 1,10-phenanthroline extractant

Zsabka, P. ; Opsomer, T. ; Van Hecke, K. ; Dehaen, W. ; Wilden, A.FZJ* ; Modolo, G.FZJ* ; Verwerft, M. ; Binnemans, K. ; Cardinaels, T. (Corresponding author)

2020
Taylor & Francis Philadelphia, PA

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Please use a persistent id in citations: http://hdl.handle.net/2128/26340  doi:10.1080/07366299.2020.1790105

Abstract: A new N-atom donor extractant 2,9-bis(1-(2-ethylhexyl)-1H-1,2,3-triazol-4-yl)-1,10-phenanthroline (EH-BTzPhen) was synthesized and used in solvent extraction studies to separate the trivalent minor actinides americium(III) and curium(III) from europium(III), representing fission product lanthanides. The extractant was found to be soluble in 1-octanol and in the Aliquat-336 nitrate ([A336][NO3]) ionic liquid diluent, but insoluble in n-dodecane. The [A336][NO3] is a fully incinerable room temperature ionic liquid, and has a higher flash point than aliphatic diluents such as 1-octanol. The EH-BTzPhen proved to be effective for selective minor actinide extraction only in combination with 2-bromohexanoic acid synergist when 1-octanol was used as a diluent (SFAm/Eu > 200). The change of the diluent from 1-octanol to Aliquat-336 nitrate allowed selective An(III) extraction from low acidity feed solutions without the need of a synergist (SFAm/Eu ~ 70 and SFAm/Cm ~ 1.9-2.2). The phase transfer kinetics of the ligand-metal complexes is however very slow at 22 °C in the case of both solvents. With this newly synthesized extractant the achieved SFAm/Cm were comparable to the values achieved with the established CyMe4BTBP and CyMe4BTPhen extractants.

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Contributing Institute(s):

1. Nukleare Entsorgung und Reaktorsicherheit (IEK-6)

Research Program(s):

1. 161 - Nuclear Waste Management (POF3-161) (POF3-161)

Appears in the scientific report 2020

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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