Features of the Isotopic Distribution of Uranium at the Interface between Polar and Nonpolar Media

The adsorption of UO2(NO3)2·2TBP complexes in a heterogeneous system at the interface of a polar 5.6 М HNO3 solution and a nonpolar polypropylene (C3H6)n surface was studied. The isotopic distribution of uranium changes at the vertical interface of the media. The kinetics of the extraction of UO2(NO3)2·2TBP complexes in the heterogeneous system is described by the Erofeev–Kolmogorov pseudo-first-order model and the Ho–McKay pseudo-second-order model.