In order to improve the situation that alumina column is easily blocked during the extraction of 99Mo in Medical Isotope Test Reactor and further improve the adsorption effect of 99Mo under low enriched uranium condition,the synthesis of spherical alumina was studied.Alumina microspheres were prepared by sol-gel-oil column molding,and their adsorption behavior and dynamic adsorption conditions were investigated.The study on the extraction of Mo by spherical alumina in simulated low enriched uranium fuel solution was carried out.The results show that the prepared spherical alumina has larger particle size and specific surface area,which can effectively alleviate the column plugging problem and improve the adsorption capacity of Mo.The adsorption process of Mo was consistent with the quasi-second-order kinetic model and the Freundlich adsorption isotherm model.In the simulated solution of low enriched uranium fuel,the recovery rate of spherical alumina to Mo is 87.4％,and the impurities also meet the requirements of pharmacopoeia.Therefore,the prepared spherical alumina is expected to be applied to the extraction process of 99Mo in medical isotope test reactor.
Oil column methodSpherical alumina99MoLow enriched uraniumMedical isotope test reactor
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