Enzymatic hydroxyapatite as a carrier for yttrium-90 and copper and ruthenium radionuclides

The use of hydroxyapatite obtained by enzymatic synthesis (HAPE) as a carrier of radionuclides (yttrium-90, copper(II) as a prototype of 64Cu and 67Cu and ruthenium-103 as a prototype of 97Ru) is considered. The processes of sorption and desorption of ions in different solutions are compared. The sorption of copper and yttrium on HAPE is almost irreversible, in contrast to the sorption of ruthenium, for which the reverse process depends on the medium.