Application of Advanced Radio Analytical Technique in Characterization of Anion Exchange Resins Duolite A-368 and Duolite A-171

摘要

The present study deals with the application of radio analytical technique for characterization of two anion exchange resins Duolite A-368 and Duolite A-171 by using 131I and 82 Br as a tracer isotopes. The characterization is made on the basis of kinetics of iodide and bromide ion-isotopic exchange reactions studied under different experimental conditions like temperature and concentration of exchanging medium. It is observed that both the resins the bromide and iodide ion-isotopic reaction rates in min-1 increases with concentration of exchanging medium and decreases with rise in temperature. In addition to exchange reaction rates, other parameters like distribution coefficient, amount of ion exchanged in mmol and percentage of ions exchanged are also calculated. The results indicate existence of strong positive co-relationship between amount of ions exchanged and concentration of ionic solution, while a strong negative co-relationship exist between amounts of ions exchanged and temperature of exchanging medium. The reaction rate and distribution coefficient values, amount and percentage of ions exchanged calculated for Duolite A-171 resins are higher than that obtained for Duolite A-368 resins. The overall results indicate superior performance of Duolite A-171 resins than Duolite A-368 resins under identical operational parameters.