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Effect of Temperature of Regenerant on Removal of Radionuclides from Ion Exchange Resins

Dairy Products Laboratory, Eastern Utilization Research and Development, Division Agricultural Research Service, USDA, Washington, D. C.

ABSTRACT

It is shown that the amount of Sr⁸⁵ and Cs¹³⁴ eluted from cationic ion exchange resin columns is increased by increasing the temperature of a regenerating salt solution; similarly, I¹³¹ elution from an anionic resin is increased by heating 2 N HCl used for elution. The advantage gained by heating the solutions may be partially offset by the added expense of heating. However, a definite advantage of such a daily operation may be the reduction of bacteria in the resin columns. If this method were used as a means to control bacteria, the two advantages thus gained should more than compensate for the added cost of heating the regenerating solutions. The reduction in operating time would also be an advantage.