Abstract
Extraction of Am(III) and Ln(III) from NaClO4 medium with di(2-ethylhexyl)dithiophosphoric acid (DEHDTP), di(2-ethylhexyl)monothiophosphoric acid (DEHMTP), di(2-ethylhexyl)monothiophosphinic acid (DEHMTPI), dihexyldithiophosphinic acid (DHXDTPI), diheptyldithiophosphinic acid (DHPDTPI), dioctyldithiophosphinic acids (DODTPI), dinonyldithiophosphinic acid (DNDTPI), di(1-methylheptyl)dithiophosphinic acid (DMHDTPI) and di(2-ethylhexyl)dithiophosphinic acid (DEHDTPI) in xylene has been investigated. The order of the extraction selectivity for Am(III) is DEHDTPI > DEHDTP > DEHMTPI > DEHMTP, DHPDTPI > DODTPI > DHXDTPI > DNDTPI, DMHDTPI > DEHDTPI > DODTPI, for extractants with 2-ethylhexyl alkyl, straight chain alkyl, branch chain alkyl, respectively. Using 0.1 mol/l NaClO4 solution as aqueous phase, the slope values of the logD-pH and logD-logC curves are not integers, and the slope values for Am(III) are slightly higher than those for Eu(III), for all extractants. The relationship between the slope value and extraction conditions can be described as: logS = alg(C HA/C M S/4)+b. In the presence of macro Eu(ClO4)3, the formula, logSF Am/Ln = B-2log(C HL-D Ln/(D Ln + 1)C Eu), can well describe the relationship between separation factor and the extraction condition. A high separation factor (SF Am/Eu = 2500) is obtained by solvent extraction with 0.5 mol/1 DEHDTPI in toluene from 1 mol/l NaNO3 solution.
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References
Yusheng Yang, The separation method and chemical foundation of transplutonium element, Proce. 3rd Chinese Nuclear and Radiochemistry Conf., Shanghai (China), B7, 1990.
Yongjun Zhu, Jing Chen, Rongzhou Jiao, Solv. Extr. Ion Exch., 14 (1996) 61.
G. Modlo, R. Odoj, Solv. Extr. Ion Exch., 17 (1999) 33.
Guoxin Tian, Yongjun Zhu, Jingming Xu, Solv. Extr. Ion Exch., 19 (2001) 993.
Qichu Xu, Lixing Zhang, YuSheng Yang, J. Nucl. Radiochem., 20 (1998) 123 (in Chinese).
Qichu Xu, Lixing Zhang, YuSheng Yang, J. Nucl. Radiochem., 22 (2000) 243 (in Chinese).
Yun Shao, Qichu Xu, YuSheng Yang et al., J. Nucl. Radiochem., 23 (2001) 63 (in Chinese).
C. Musikas, Actinide-lanthanide group separation using sulfur and nitrogen donor extractants, actinide/lanthanide separations, Proc. Intern. Symp., World Scientific Publisher, Singapore, 1985, p. 19.
R. Fitoussi, C. Musikas, H. Ranarivello, Separating Actinides and Lanthanides From an Aqueous Acid Solution, Europe Patent, EP 43765, 1982.
D. Pattee, C. Musikas, J. Less-Common Met., 122 (1986) 107.
Yongjun Zhu, Rongzhou Jiao, Radiochim. Acta, 69 (1995) 191.
Jarvinen et al., Separation of f Elements, K. L. Nash and G. R. Choppin (Eds), Plenum Press, New York, 1995, p. 571.
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Xu, Q., Wu, J., Zhang, L. et al. Extraction of Am(III) and Eu(III) with dialkyldi (or mono) thiophosphinic (or phosphoric) acids. J Radioanal Nucl Chem 273, 235–245 (2007). https://doi.org/10.1007/s10967-007-0742-8
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DOI: https://doi.org/10.1007/s10967-007-0742-8