Removing Radiostrontium from Milk–Current Status of a Pilot Plant Process

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Abstract
A pilot-plant process utilizing ion exchange resins for removing radioactive strontium from milk is outlined. The resin employed is a nuclear sulfonic acid type. Milk contaminated with radiostrontium is passed through a bed of the resin charged with a mixed solution of the cations: Ca, K, Na and Mg, which are present in milk. An important feature of the process is that the acidity of the milk is adjusted, before passing it through the resin, to a pH of about 5.3 with citric acid. At this pH strontium is largely converted to a soluble and more readily exchangeable form. With this process about 90%, of the radiostrontium can be removed.

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