Ion Exchange Processes for Removing Radioactive Contamination from Milk

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Abstract
Ion exchange processes for removing radionuclides from milk are discussed. The processes include (1) a fixed bed acid ion exchange resin system with which 95% of radiostrontium can be removed; (2) a fixed bed strong base resin for removing about 90% of l131 and (3) a continuous ion exchange contactor for removing both cationic radionuclides and ll31. To minimize changes in the cationic composition of milk, the strong acid resin was regenerated with a mixed solution of Ca, K, Na and Mg chlorides; similarly, changes in the anionic composition were minimized by regenerating the anionic resin with a mixed solution containing the sodium salts of citrate, chloride and phosphate.