KINETICS AND MECHANISM OF BROMIDE ION-ISOTOPIC EXCHANGE REACTION IN STRONGLY BASIC ANION EXCHANGE RESIN DUOLITE A-162 BY APPLICATION OF RADIOACTIVE TRACER TECHNIQUE

摘要

In the present investigation 82Br radioactive isotope was used as a tracer to study the kinetics and mechanism of exchange reaction between the ion exchange resin and the external bromide ion solution. In an attempt to study the reversible bromide ion-isotopic exchange reaction kinetics, it was expected that whether the initial step was the exchange of radioactive bromide ions in the solution in to the ion exchange resin (forward reaction) or from the ion exchange resin to the solution (reverse reaction), the two ion-isotopic exchange reactions should occur simultaneously, which was further confirmed from the experimental values of specific reaction rate 0.130 and 0.131 min–1 respectively. The results will be useful to standardize the process parameters so as to bring about the optimum utilization of ion exchange resins in various industrial applications.