Application of radioactive tracer technique for characterization of strongly basic anion-exchange resins duolite A 101D and duolite A 102D1

The radioactive ⁸²Br was used as a tracer to study the bromide self-diffusion reactions. The effect of temperature, concentration of ionic solution, and amount of ion-exchange resin on the kinetics of exchange reactions was examined. Under identical experimental conditions, the specific reaction rate, amount of bromide ions exchanged, and initial rate of bromide ion exchange calculated for Duolite A 101D resin were higher than those calculated for Duolite A 102D resin. The difference in the values calculated for the two resins was attributed to their water-holding capacities. The probable mechanism of bromide isotope exchange reaction was also predicted by comparing the specific reaction rate of rapid and slow exchange process. It is expected that the same technique can be employed to assess the efficiency of various ion exchangers under different operating conditions.