Kinetics of Bromide Ion-Isotope Exchange with Weakly Basic Macroporous Resin Indion-860

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Abstract

Kinetics of bromide ion-isotope exchange with weakly basic macroporous resin Indion-860 was studied. Two sets of experiments were performed. In the first set, inactive ion-exchange resin samples in the bromide form were equilibrated with a radioactive bromide solution spiked with 82Br tracer, and in the second set of experiments, labeled radioactive ion-exchange resin samples in the bromide form were equilibrated with an inactive bromide solution. The temperature was varied from 25.0 to 40.0°C, and the concentration of bromide ions in solution, from 0.005 to 0.100 M. In separate experiments, performed at a fixed temperature of 25.0°C using 0.0100 M bromide ion solution, the amount of the labeled radioactive ion-exchange resin was varied from 0.250 to 1.000 g. Essentially similar rate constants were obtained for the forward and reverse reactions.

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