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Strontium in Milk. II. Removal by Batch Ion Exchange Methods¹

Dairy Department, University of Tennessee, Knoxville, and UT-AEC Agricultural Research Laboratory, Oak Ridge, Tennessee

ABSTRACT

Skimmilk containing Sr⁸⁹ and Ca⁴⁵ was left in contact with Dowex 50W-X12 in the calcium form for periods of 1, 10, 60, and 120 min. Apparent equilibrium was reached between the 1- and 10-min. periods. A dosed milk-resin ratio study showed that as the ratio increased, the percentage of removal of Sr⁸⁹ and Ca⁴⁵ decreased. The percentage removal ranged from a high of 94 and 93 for Sr⁸⁹ and Ca⁴⁵, respectively, at a milk-resin ratio of 2, to a low of 21% Sr⁸⁹ and 16% Ca⁴⁵ at a milk-resin ratio of 200. At a milk-resin ratio of 2, 4.27% of the resin capacity was utilized and at a ratio of 200, 73.6% was utilized for exchange of Sr and Ca.

¹ This manuscript is published with the permission of the director of the University of Tennessee Agricultural Experiment Station, Knoxville, Tennessee. The radioactive materials used in this work were obtained from the United States Atomic Energy Commission. The work was completed under Contract No. AT-40-1-GEN-242 between the University of Tennessee College of Agriculture and the Atomic Energy Commission.