Journal Article

FZJ-2022-03759

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Complexation and Extraction Studies of Trivalent Actinides and Lanthanides with Water-Soluble and CHON-Compatible Ligands for the Selective Extraction of Americium

Weßling, P. (Corresponding author) ; Maag, M. ; Baruth, G. ; Sittel, T. ; Sauerwein, F. S.FZJ* ; Wilden, A.FZJ* ; Modolo, G.FZJ* ; Geist, A. ; Panak, P. J.

2022
American Chemical Society Washington, DC

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Please use a persistent id in citations: http://hdl.handle.net/2128/33451  doi:10.1021/acs.inorgchem.2c02871

Abstract: Novel hydrophilic ligands to selectively separate Am(III) are synthesized: 3,3′-([2,2′-bipyridine]-6,6′-diylbis(1H-1,2,3-triazole-4,1-diyl))bis(propan-1-ol) (PrOH-BPTD) and 3,3′-([2,2′-bipyridine]-6,6′-diylbis(1H-1,2,3-triazole-4,1-diyl))bis(ethan-1-ol) (EtOH-BPTD). The complexation of An(III) and Ln(III) with PrOH- and EtOH-BPTD is studied by time-resolved laser fluorescence spectroscopy. [ML2]3+ is found for both Cm(III) and Eu(III), while [ML]3+ is only formed with Cm(III). Stability constants show a preferential coordination of Cm(III) over Eu(III) with PrOH-BPTD being the stronger ligand. The distribution of Am(III), Cm(III), and Ln(III) between an organic phase containing the extracting agent N,N,N′,N′-tetra-n-octyl-3-oxapentanediamide (TODGA) and aqueous phases containing PrOH-BPTD is studied as a function of time and temperature as well as the TODGA, BPTD, and HNO3 concentrations. A system composed of 0.2 mol/L TODGA and 0.04 mol/L PrOH-BPTD in 0.33–0.39 mol/L HNO3 allows for selective Am(III) back-extraction into the aqueous phase while keeping Cm(III) and Ln(III) in the organic phase, marking PrOH-BPTD as an excellent complexant for an optimized AmSel process (Am(III) selective extraction).

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Contributing Institute(s):

1. Nukleare Entsorgung (IEK-6)

Research Program(s):

1. 1412 - Predisposal (POF4-141) (POF4-141)
2. PATRICIA - Partitioning And Transmuter Research Initiative in a Collaborative Innovation Action (945077) (945077)
3. BMBF-02NUK059D - Spektroskopische Charakterisierung von f-Element-Komplexen mit soft donor-Liganden (f-Char) (BMBF-02NUK059D) (BMBF-02NUK059D)

Appears in the scientific report 2022

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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 Expanded ; Web of Science Core Collection

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