STUDY ON EXTRACTION OF ~(244) Cm BY HBTMPDTP

The extraction of trace amount of 24 4 Cm by HBTMPDTP from NaNO 3-HNO 3 solution is studied. The distribution ratios of 244 Cm vary with stirring time, ion intensity, pH value of equilibrated aqueous phase, concentration of HBTMPDTP and temperature. The equation of extraction is obtained and the following parameters are calculated: equilibrium constant K ex =10 -7.84±0.09 ,extraction enthalpy Δ H 0=17.4 kJ/mol and extraction entropy Δ S 0=-95.2 (J·mol)/K.