Performance Based Evaluation of Industrial Grade Resins Duolite ARA-9366 and Duolite A-368

Abstract

This study deals with performance evaluation of nuclear and non-nuclear grade resins Duolite ARA-9366 and Duolite A-368 by application of the radioanalytical technique. The evaluation was made based on kinetics data of ion-isotopic exchange reactions using 131I and 82Br radioactive tracer isotopes. It was observed that under identical experimental conditions of 35.0 °C, 1.000 g of ion exchange resins and 0.002 mol l -1 labelled iodide ion solution, the values of specific reaction rate in min-1 and initial rate of iodide ion exchange in mmol min -1 was 0.173 and 0.044 respectively for Duolite ARA-9366 resin; that was higher than the values of 0.129 and 0.030 respectively report- ed for Duolite A-368 resins. The identical trend was observed for the two resins during bromide ion-isotopic exchange reaction. The results of this investigation show the existence of a strong positive co-relationship between the amount of ions exchanged and the concentration of ionic solution; as well as the existence of a strong negative co-relationship between the amount of ions exchanged and the temperature of the exchanging medium for both resins. The overall results indicate superior performance of Duolite ARA-9366 over Duolite A-368 under identical experimental conditions.

Keywords

• Ion exchange resins
• radiotracer isotopes
• reaction kinetics
• Duolite ARA-9366
• Duolite A-368
• 131I
• 82Br