Kinetics of ion exchange in binary and ternary systems using strongly acidic cation exchanger: Part 2-Kinetic behaviour and diffusion coefficients in ternary system

Abstract

The three necked flask technique has been empolyed to study the kinetics of ion exchange in ternary system of H^{+ _}Na⁺ ­ UO<img src='http://www.niscair.res.in/jinfo/twoplustwo.gif' border=0>. The kinetic curves have been obtained with changing the fraction of counter ions in bulk solution, the rate of stirring, temperature and resin radius. The particle diffusion coefficients in ternary system has been calculated by fitting the polar-coordination equation, and it has been found that they are of same order as that of corresponding binary systems and the sequence of them is <img src='http://www.niscair.res.in/jinfo/equation57.gif' border=0>_H &gt; <img src='http://www.niscair.res.in/jinfo/equation57.gif' border=0>_Na &gt; <img src='http://www.niscair.res.in/jinfo/equation57.gif' border=0>_uo₂ . The selectivity coefficients are also reported, and the sequence of them is exactly opposite to that of particle diffusion coefficients.