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Peter Kaufholz, Fabian Sadowski, Andreas Wilden, Giuseppe Modolo, Frank W. Lewis, Andrew W. Smith and Laurence M. Harwood

Abstract

The novel hydrophilic back-extraction agent TS-BTPhen (3,3ʹ,3ʺ,3ʹʺ-[3-(1,10-phenanthroline-2,9-diyl)-1,2,4-triazine-5,5,6,6-tetrayl]tetrabenzenesulfonic acid) was tested for its selectivity towards Am(III) over Cm(III) and Eu(III) with a TODGA (N,N,Nʹ,Nʹ-tetraoctyldiglycolamide) based solvent. Batch experiments were carried out using TS-BTPhen dissolved in aqueous nitric acid solution with tracers of 152Eu, 241Am and 244Cm. A significant increase of the separation factor for Cm over Am from SFCm/Am = 1.6 up to SFCm/Am = 3.3 was observed compared to the use of a TODGA-nitric acid system alone. Furthermore, stripping was possible at high nitric acid concentrations (0.6-0.7 mol/L) resulting in a low sensitivity to acidity changes. The influence of the TS-BTPhen concentration was analyzed. A slope of -2 was expected taking into account literature stoichiometries of the lipophilic analogue CyMe4BTPhen. However, a slope of -1 was found. Batch stripping kinetics showed fast kinetics for the trivalent actinides. As an alternative organic ligand the methylated TODGA derivate Me-TODGA (2-methyl-N,N,Nʹ,Nʹ-tetraoctyldiglycolamide) was tested in combination with the hydrophilic TS-BTPhen. The Am(III) separation was achieved at even higher nitric acid concentrations compared to TODGA.

Open access

Karel Rohlena and Martin Mašek

., Pavlov, D. V., Urlin, V. D., Funtikov, A. I., & Yakutov, B. P. (1992). O raspade vozdushnoy plazmy obrazovannoy lazerom. In G. A. Kirillov, M. V. Sinitsyn, & V. D. Urlin (Eds.), Veshchestvo v ekstremalnykh usloviyakh (Trudy uchenykh yadernykh tsentrov Rossii, pp. 156-162). Nizhny Novgorod: MAE RF, RFYaTs-VNIIEF. 9. Civiš, S., Juha, L., Babánková, D., Cvačka, J., Frank, O., Jehlička, J., Králiková, B., Krása, J., Kubelík, P., Muck, A., Pfeifer, M., & Ullschmied, J. (2004). Amino acid formation induced by high-power laser in CO2/ CO-N2-H2O gas mixtures

Open access

Marek Wiertel, Zbigniew Surowiec, Mieczysław Budzyński, Jan Sarzyński and Anatoly I. Beskrovnyi

, silicides, and phosphides of transition and noble metals. J. Less-Common Met. , 82 , 75–80. DOI: 10.1016/0022-5088(81)90200-9. 7. Wiertel, M., Surowiec, Z., Beskrovnyi, A. I., Sarzyński, J., & Budzyński, M. (2005). Determination of magnetic moments and hyperfine fields in ScFe 2 Laves phase compound. Annual Report Frank Laboratory of Neutron Physics . Dubna, Russian Federation: Joint Institute for Nuclear Research. Retrieved June 18, 2014 from: http://flnp.jinr.ru/img/304/188_2005_Annual_Report.pdf . 8. Yamada, H. (1988). Electronic structure and magnetic