نوع مقاله : مقاله پژوهشی
نویسندگان
پژوهشکده چرخه سوخت هستهای، پژوهشگاه علوم و فنون هستهای، سازمان انرژی اتمی ایران، صندوق پستی: 8486-11365، تهران- ایران
کلیدواژهها
عنوان مقاله English
نویسندگان English
The radionuclide Technicium-99, which is a widely used radionuclide in nuclear medicine, is produced from molybdenum-99, which is mainly produced by the fission of Uranium-235. Separation and purification of molybdenum from other fission products is considered a big challenge due to its high activity and variety of impurities. In this research, anion exchange chromatography was used for Mo-99 purification on a semi-industrial scale at 0.02mg (100mCi). The optimization of the effective parameters including the amount of resin, flow rate and volume of solutions entering the column in each step of washing and rinsing in two modes was performed by two methods; cold test (by addition of Mo- 99 as a tracer to the feed solution) and hot test (using a real sample obtained from acidic dissolution of the irradiated target containing U-235 (U3O8/Alx). The values of the optimum parameters for the cold/hot tests including the amount of resin 4g/7.5g, the eluent volume 50ml/70ml, the washing volume 60ml/84ml and the flow rates of the elution step were 5.64ml/min/ 4ml/min, respectively. The loading and washing speeds were the same for both modes. The molybdenum purity obtained in the cold test was up to 100% and up to 98.17 percent in the hot test.
کلیدواژهها English