Abstract
Coprecipitation of 90Sr and 90Y with lead phosphate as influenced by various factors was studied with the aim to find conditions for their separation. It was shown that, under certain conditions, these radionuclides can be quantitatively recovered from a solution; however, it is impossible to provide efficient separation of strontium and yttrium in one stage of precipitation of lead phosphate solely by varying pH. The studies of coprecipitation of 90Sr and 90Y with lead phosphate in the presence of DTPA and stable yttrium showed that the presence of this complexing agent does not hinder quantitative precipitation of strontium, while practically all yttrium remains in the solution. The optimal conditions of precipitation of lead phosphate ensuring high degree of separation (up to 97% in one precipitation stage) of 90Sr from 90Y were determined.
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