Ion-isotopic exchange reaction kinetics using organic base anion exchange resins Indion-102 and Indion GS-400

• Published in: Colloid journal of the Russian Academy of Sciences Vol. 76; no. 5; pp. 637 - 643
• Main Author: Singare, P. U.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.09.2014
• Subjects: Chemistry; Chemistry and Materials Science; Polymer Sciences; Surfaces and Interfaces; Thin Films; Bromide Form; Radioactive Tracer Isotope; Colloid Journal; Specific Reaction Rate; Identical Experimental Condition
• ISSN: 1061-933X; 1608-3067
• DOI: 10.1134/S1061933X14050135

The present study deals with the kinetic study of iodide and bromide ion-isotopic exchange reactions in organic based anion exchange resins Indion-102 (nuclear grade) and Indion GS-400 (non-nuclear grade) using radiotracer isotopes. The resins in iodide and bromide form were equilibrated respectively with iodide and bromide ion solutions which were previously spiked with 131 I and 82 Br radiotracer isotopes. For both bromide and iodide ion-isotopic exchange reactions, it was observed that the values of specific reaction rate increase with increase in ion concentration from 0.001 to 0.004 M at a constant temperature of 40.0°C. However, at constant ion concentration of 0.003 M, the specific reaction rate was observed to decrease with rise in temperature from 30.0 to 45.0°C. Also it was observed that for iodide ion-isotopic exchange reaction by using Indion-102 resin, the values of specific reaction rate, amount of iodide ion exchanged, initial rate of iodide ion exchange and log K d were 0.258 min −1 , 0.492 mmol, 0.127 mmol/min and 19.2, respectively, which were higher than 0.208 min −1 , 0.416 mmol, 0.087 mmol/min and 17.6, respectively, obtained by using Indion GS-400 resin under identical experimental conditions of 40.0°C, 1.000 g of ion exchange resin and 0.003M labeled iodide ion solution. The same trend was observed for the two resins during bromide ion-isotopic exchange reaction. The overall results indicate that, under identical experimental conditions, Indion-102 resin shows higher performance than Indion GS-400 resin.