Studies on Am(III) separation from simulated high-level waste using cobalt bis(dicarbollide) (1− ) ion derivative covalently bound to N,N′-di-n-octyl diglycol diamide as extractant and DTPA as stripping agent

M. Bubeníková; P. Selucký; J. Rais; B. Grüner; P. Švec

doi:10.1007/s10967-012-1679-0

Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 293: Issue 1

Studies on Am(III) separation from simulated high-level waste using cobalt bis(dicarbollide) (1⁻ ) ion derivative covalently bound to N,N′-di-n-octyl diglycol diamide as extractant and DTPA as stripping agent

Authors:

M. Bubeníková

M. Bubeníková Nuclear Research Institute plc, 250 68 Řež near Prague, Czech Republic

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P. Selucký

P. Selucký Nuclear Research Institute plc, 250 68 Řež near Prague, Czech Republic

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J. Rais

J. Rais Nuclear Research Institute plc, 250 68 Řež near Prague, Czech Republic

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B. Grüner

B. Grüner Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, v.v.i. 250 68 Řež near Prague, Czech Republic

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P. Švec

P. Švec Institute of Inorganic Chemistry, Academy of Sciences of the Czech Republic, v.v.i. 250 68 Řež near Prague, Czech Republic

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Pages:: 403–408

Online Publication Date:: 21 Feb 2012

Publication Date:: 01 Jul 2012

Article Category:: Research Article

DOI:: https://doi.org/10.1007/s10967-012-1679-0

Keywords:: Solvent extraction; Actinides; High-level liquid waste; Dicarbollide derivatives; Carboranes; TODGA; DTPA

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Abstract

The separation of minor actinides from high level liquid waste (HLLW) belongs to the principal challenges in current nuclear treatment. A derivative based on two cobalt bis(dicarbollide) (1⁻) ions covalently bound to the N,N′-di-n-octyl diglycolyl amide platform via diethyleneglycol chain with the formula {[(N,N′-(8-(OCH₂ CH₂)₂-1,2-C₂B₉H₁₀)(1′,2′-C₂B₉H₁₁)-3,3′-Co)(N,N′-n-C₈H₁₇)NCOCH₂]₂O}Na₂ (TODGA-COSAN), dissolved in low polar mixture of hexyl methyl ketone and n-dodecane, was used as an extractant for efficient Am(III)/Eu(III) separation from PUREX HLLW. Am(III) could be selectively stripped from loaded organic phase by using a stripping agent composed from 0.05 M DTPA and 1 M citric acid as a buffer and 1 M NaNO₃ at pH 3.0. Separation factor between europium and americium of 13 was achieved. The europium remaining in the organic phase could be consecutively effectively stripped by using solution of ammonium citrate or ammonium citrate with ammonium DTPA at pH~7.

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Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5731 (Print)
ISSN	1588-2780 (Online)