Nitric acid transport across TBP - kerosene oil supported liquid membranes

HNO3 transport across tri-n-butyl phosphate kerosene oil supported liquid membrane with or without uranyl ion transport was studied. Parameters studied are the effect of TBP in the membrane, nitric acid in the feed solution and nitrate ion concentration in the feed solution. From the experimental data and using theoretical equations the complex under transport through the membrane appears to be 2TBP · HNO3 both in the presence and absence of uranyl ions. The diffusion coefficient for H+ ions through the membrane as a function of TBP concentration varies from (53 to 6) · 10-12 m2s-1, based on experimental flux and permeability data. The value of distribution coefficient varies in the reverse direction from 0.06 to 1.46 at the same TBP concentration. (author) 4 refs.; 10 figs