2009
DOI: 10.1080/18811248.2007.9711502
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Thermodynamic Properties of Lanthanides and Actinides for Reductive Extraction of Minor Actinides

Abstract: The excess thermodynamic quantities of lanthanides and actinides in molten salts and liquid metals were studied for reductive extraction of minor actinides. The excess enthalpies and entropies of those elements in the molten chloride phase were found to be correlated with the ionic radii of metal ions possibly due to complex formation. In the liquid metal phase, on the other hand, the excess enthalpies were explained with Miedema's atomistic model and the excess entropies were explained with the vibrational en… Show more

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Cited by 41 publications
(16 citation statements)
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“…From a thermodynamic point of view, it is interesting to compare the present results with the predicted results obtained recently [9]. In parallel with the present experiment, some predictions of the distribution coefficients were performed for reductive extraction of MAs.…”
Section: Fig 2 Distribution Coefficients Of Am and Ce As A Functionmentioning
confidence: 72%
“…From a thermodynamic point of view, it is interesting to compare the present results with the predicted results obtained recently [9]. In parallel with the present experiment, some predictions of the distribution coefficients were performed for reductive extraction of MAs.…”
Section: Fig 2 Distribution Coefficients Of Am and Ce As A Functionmentioning
confidence: 72%
“…Pyrochemical and electrochemical processes using high temperature melts are expected to be much useful for separation and recovery of actinides from fission products, and are now being studied in some countries [1]. An analysis of the excess thermodynamic quantities of lanthanides and actinides in high temperature melts was then made from a systematic point of view for reductive extraction of minor actinides (MAs) [2]. The excess enthalpies and entropies of actinide and lanthanide trichlorides in molten chloride phase were found to be correlated with the ionic radii of metal ions possibly due to complex formation.…”
Section: Introductionmentioning
confidence: 99%
“…For further development of the databases, it is needed to improve both the quantity and quality of the excess thermodynamic data by experimental measurements. The purpose of this study is thus to determine the thermodynamic quantities of lanthanides in liquid lead by using the electromotive force (EMF) measurement method, for which reliable values are considered to be still lacked [2]. The activity coefficients of lanthanides in liquid Pb are calculated from the Nernst equation, and then the excess enthalpies and entropies of lanthanides in liquid Pb are obtained for comparison with the literature values [5,6].…”
Section: Introductionmentioning
confidence: 99%
“…Compared with a traditional method of separation actinides (An) by hydrometallurgical process from fission products (FPs), pyrochemical reprocessing has been considered as a promising alternative due to its compactness, criticality control benefits, resistance to radiation effects, compatibility with advanced fuel types, and the ability to produce low purity products to prevent nuclear proliferation [1][2][3] . Because An and lanthanides (Ln) have similar chemical properties, it is an essential and challenging issue to efficient separation of An over Ln in FPs [4][5][6][7][8] .…”
mentioning
confidence: 99%