Solvent Extraction Behavior of Lanthanides with Di(2-Ethylhexyl) Isopropylphosphonate
Investigations of the behavior of lanthanides in solvent extraction can contribute both to design an effective extraction systems for metal separation and particularly to the development of the lanthanide theory. Fidelis et al. (1,2) has studied the regularity of variation of thermodynamic functions in the process of lanthanide extraction. Recently, Siekierski (3) examined the position of Y, in respect to ΔG°, ΔH° and ΔS° of extraction and complex formation in the lanthanide series. As shown by our studies (4,5) the regularity of variation of the equilibrium constant, free energy and entropy change reveals a tetrad effect.
KeywordsThermodynamic Function Tetrad Effect Lanthanide Series Metal Separation Cation Exchange Mechanism
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