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The Effect of Diluents on Extraction of Actinides and Lanthanides

Published online by Cambridge University Press:  19 October 2011

Teodora Valeria Retegan ,
Christian Ekberg ,
Anna Fermvik  and
Gunnar Skarnemark
Teodora Valeria Retegan
Affiliation:
[email protected], Chalmers University of Technology, Nuclear Chemistry, Kemivagen no. 4, Gothenburg, 412 96, Sweden, +46-31-7722920, +46-31-7722931
Christian Ekberg
Affiliation:
[email protected], Chalmers University of Technology, Nuclear Chemistry, Kemivagen no. 4, Gothenburg, 412 96, Sweden
Anna Fermvik
Affiliation:
[email protected], Chalmers University of Technology, Nuclear Chemistry, Kemivagen no. 4, Gothenburg, 412 96, Sweden
Gunnar Skarnemark
Affiliation:
[email protected], Chalmers University of Technology, Nuclear Chemistry, Kemivagen no. 4, Gothenburg, 412 96, Sweden
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Abstract

A screening experiment was carried out where the organic phase consisted of different concentrations of 2,6-bis-(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-benzo[1,2,4]triazy-3-yl)-[2,2']bipyridinyl (CyMe4-BTBP) [1], which is the extracting molecule, dissolved in different diluents. The aqueous phase consisted of 0.01 M HNO3 and was spiked with trace amounts of 241Am and 152Eu acting as analogues for actinides and lanthanides. The ionic strength was kept constant at 1.0 M using NaNO3. Three of the selected diluents used to dissolve CyMe4-BTBP were abandoned: n-hexane, TPH and TBB. Another extraction experiment screened out anisole, 1,1,2,2-tetrachloroethane and benzaldehyde.

A kinetic experiment was then performed. Three very different kinetic behaviors were observed in three different organic systems. For a proper understanding of the kinetic mechanism, further investigations are needed.

Keywords

actinidelanthanidewaste management
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 985: Symposium NN – Scientific Basis for Nuclear Waste Management XXX , 2006 , 0985-NN14-05
Copyright
Copyright © Materials Research Society 2007

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