HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Easterly, D. G. Articles by Edmondson, L. F. Search for Related Content PubMed Articles by Easterly, D. G. Articles by Edmondson, L. F.

Factors Affecting the Removal of Radiostrontium from Milk by Ion Exchange Resins

Dairy Products Laboratory,² Eastern Utilization Research and Development Division, USDA, Washington, D. C.

ABSTRACT

The effect of temperature, flow rate, and direction of flow through columns of cationic ion exchange resins on the removal of radiostrontium from milk was studied, The milk was in vivo labeled with Sr⁸⁵. Milk temperature within the range of 40 to 80 F did not affect the amount removed (about 85%) when the milk was acidified to a pH of 5.4. When milk was passed through at normal pH (6.65), about 8% more removal was obtained at 100 F than at 40 F. No further increase was obtained by heating the milk to 180 F. However, less than half of the strontium was removed from nonacidified milk regardless of temperature. The temperature studies were carried out at a flow rate of 0.5 resin bed volume (rbv) per minute.

The amount removed from the first 30 rbv decreased from 96 to 71% as the flow rate was increased from 0.125 to 2.00 rbv per minute.

Studies comparing the relative effectiveness of downflow and upflow of milk through the columns showed that about 8% more strontium was removed by downflow at a flow rate of 0.25 rbv per minute and 12% more at 1.0 rbv per minute.

¹ U. S. Public Health Service, Department of Health, Education and Welfare, Washington, D. C.

² A joint research project supported by the AEC and PHS.