H_2O_2调价UTEVA树脂对钚的分离方法

Chemical Treatment of Plutonium With Hydrogen Peroxide Before UTEVA Separation Procedure

研究了H2O2调节钚价态至Pu（Ⅳ）的条件,对于钚质量浓度在10-3 g/L量级的溶液,适量H2O2可以将钚价态稳定在Pu（Ⅳ）。采用粒径为50~100μm的UTEVA树脂填充的柱体积为2mL的萃取色层柱,在6mol/L HNO3浓度下,使用w=1.5%H2O2作为氧化还原剂对10-2 g/L的钚进行预处理,能将钚吸附上柱。通过适当条件的洗脱,在铀、镎、钚混合溶液中,得到钚的回收率约为108%。

The conditions of adjusting Pu valence to Pu（Ⅳ） by H2O2 were studied. H2O2 is capable of converting Pu to Pu（IV ） if the Pu concentration is about 10^-3 g/L. The separation procedure was studied for small quantity Pu. w=1. 5% H2O2 is used to adjust the valency of plutonium in 6 mol/L HNO3. UTEVA column filled with 2 mL resin which has a diameter of 50-100 μm are used to separate plutonium. The recovery of plutonium is about 108%.