Abstract
The present study deals with modeling of ion-isotopic exchange reaction kinetics by application of radioactive tracer isotopes 82Br and 131I. The bromide and iodide ion-isotopic exchange reactions was carried out by using weak base anion exchange resins Indion-AGR and Duolite A-638. It was observed that for both the resins, reaction rate decreases with rise in temperature and increases with increase in ionic concentration. The study was extended further for characterization of these resins based on their performance under different operational parameters. It was observed that the percentage/amount of ions exchanged and distribution coefficient values calculated for Duolite A-638 was higher than Indion-AGR resins under identical operational parameters, indicating superior performance of Duolite A-638 over Indion-AGR resins.
Highlights
Radio isotopes find applications in several fields of which ind ustrial app licat ions const itut e a majo r po rt io n with respect to the quantum of activ ity used and the economic benefits accrued
Considering the above wide use of rad ioactive isotopes in various industrial and technical applications, in the present investigation, they are applied to assess the performance of industrial grade anion exchange resins Indion-A GR and Duolite A-638 under d ifferent operational parameters like temperature and ionic concentrations
In case of bromide ion-isotopic exchange reaction, the percentage of bromide ions exchanged increases from 39.2% to 42.6% using Duolite A-638 resin, while for Indion-A GR resin it increases from 37.2 % to 40.6 %
Summary
Radio isotopes find applications in several fields of which ind ustrial app licat ions const itut e a majo r po rt io n with respect to the quantum of activ ity used and the economic benefits accrued. Applicat ions of radiotracers in chemical research cover the studies of reaction mechanis m, kinetics, exchange processes and analytical applications such as radiometric titrat ions, solubility product estimation, isotope dilution analysis and autoradiogrphy. Radiotracers have helped in identification of leaks in buried pipelines and dams Process parameters such as mixing efficiency, recidence t ime, flow rate, material inventory and silt movement in harbours are studied using radioisotopes[1].The efficiency of several devices in a wastewater treatment plant (primary and secondary clarifiers, aeration tank) is investigated by means of radiotracers[2]. Considering the above wide use of rad ioactive isotopes in various industrial and technical applications, in the present investigation, they are applied to assess the performance of industrial grade anion exchange resins Indion-A GR and Duolite A-638 under d ifferent operational parameters like temperature and ionic concentrations. The present technique can be extended further to standardize the operational parameters so as to bring about the most efficient performance of those resins in their specific industrial applications
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