Comparative Study of Strongly Basic Anion Exchange Resins Tulsion A-30 and Indion-820 by Application of <SUP>131</SUP>I and <SUP>82</SUP> Br as a Tracer Isotopes

Abstract

In the present investigation radioactive tracer isotopes 131 I and 82 Br were used to study the kinetics of iodide and bromide ion-isotopic exchange reaction. The kinetics study was performed to study the effect of ionic concentration and temperature on the specific reaction rate calculated in min -1 . Fro m the initial ionic concentration and knowing the value of specific reaction rate, the values of amount of ions exchanged in mmo l and percentage ion exchange were calcu lated. It was also observed that for both the resins, there exists strong positive co-relat ionship between amount of ions exchanged and concentration of ionic solution, while a strong negative co-relationship was observed between amount of ions exchanged and temperature of exchanging mediu m. The values of specific reaction rate, amount and percentage of ions exchanged so obtained for the ion-isotopic exchange reactions using strong base, nuclear grade anion exchange resin Tulsion A-30 and non-nuclear grade anion exchange resin Indion-820 were co mpared. It was observed that the above values calculated were higher for Tulsion A-30 as compared to that for Indion-820, indicating superior performance of Tu lsion A-30 under identical experimental conditions. The similar study on application of radioactive tracer isotopes can be extended further for performance assessment of different nuclear as well as non-nuclear grade ion exchange resins.

Thermodynamics of Ion-Exchange Reaction in Predicting the Ionic Selectivity of Auchlite ARA-9366 and Auchlite A-378 Anion Exchange Resins

“…The exchange capacity of ion exchange resins was experimentally determined by the standard method [17] using sodium nitrate and titrating against standard silver nitrate solution. Ion exchange resins (0.500 g) in chloride form were equilibrated with iodide ion solution of different concentrations at a constant temperature of 30.0 °C for 3 h. From the results of kinetics study reported earlier [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36]; it was observed that this duration was adequate to attain the ion exchange equilibrium. After 3 h, the iodide ion solutions in equilibrium with ion exchange resins in chloride form were analyzed for their chloride and iodide ion concentrations by …”