THERMODYNAMICS OF SOLVENT EXTRACTIONOF TL ( I ) WITH D_2EHDTPA

摘要

In the extraction system (Tl_2SO_4 + Na_2SO_4 + D_2EHDTPA + n-C_8H_(18) + H_2O), the ionic strength of the aqueous phase with Na_2SO_4 as supporting electrolyte was varied between 0.1～2.0 mol kg~(-1), the temperature was varied in the range 278.15K～303.15K, the consistency of Tl~+ and PH value were determined in the aqueous phase of extraction equilibrium. Determined the thermodynamic equilibrium constant of extraction process with the method of linearity extrapolate, accordingly calculated each thermodynamic value in the process.