水合氧化锰用于90Y发生器的制备

为探讨水合氧化锰（HMD）用于制备色谱型⁹⁰Y发生器的可行性，研究了HMD在硝酸和盐酸溶液中对Sr和Y的吸附性能。结果表明，HMD在各浓度的盐酸和硝酸溶液中均不吸附Sr ；盐酸溶液和浓度高于1 mol/L的硝酸溶液中对Y的吸附性能都较差，但在0.001~0.1 mol/L硝酸溶液中对Y的吸附性能较好。因而在低酸度的硝酸溶液中可将Sr和Y进行分离。HMD色谱柱用于Sr和Y分离时最佳高径比为5∶1；溶液的硝酸浓度为0.1 mol/L时，Sr(NO₃)₂-Y(NO₃)₃-HNO₃混合溶液通过HMD色谱柱后，超过90%的Y吸附在色谱柱上，Sr仍然保留在溶液中；色谱柱经0.1 mol/L的硝酸溶液淋洗后，再用1 mol/L的硝酸溶液可以将Y从色谱柱上洗脱，得到纯化后的Y(NO₃)₃溶液。经HMD色谱柱分离纯化的Y溶液中Sr沾污量较低。因此，HMD有望用于90Y发生器的制备。

The Preparation of 90Y Generator with Hydrated Manganese Dioxide

The adsorption behaviors of hydrated manganese oxide (HMD) for Strontium and Yttrium in hydrochloric acid and nitric acid solutions were studied. HMD does not adsorb Strontium in various concentrations of hydrochloric acid and nitric acid solutions. HMD have no absorbability for Yttrium in hydrochloric acid and in nitric acid solution when the concentration of nitric acid is higher than 1 mol/L. But it shows a good absorbability for Yttrium when the concentration of nitric acid is among 0.001-0.1 mol/L. So Strontium and Yttrium can be separated in low concentration nitric acid solution. The best height-to-diameter ratio of the HMD column is 5∶1 when it used for the separation of Sr and Y. When the Sr(NO₃)₂-Y(NO₃)₃-HNO₃ mixed in 0.1 mol/L nitric acid solution passed through the HMD column, more than 90% of Yttrium were adsorbed on the column, but Strontium were not adsorbed and still remains in the solution; After the 0.1 mol/L nitric acid cleaning process, the Yttrium adsorbed on the HMD column can be eluted with 1 mol/L nitric acid to obtain a purified Y(NO₃)₃ solution. The Strontium impurity is very low in the purified Y(NO3)3 solution. Therefore, HMD is expected to be used for the preparation of ⁹⁰Y generator.