H<sub>2</sub>O<sub>2</sub>调价UTEVA树脂对钚的分离方法

H₂O₂调价UTEVA树脂对钚的分离方法

摘要: 研究了H₂O₂调节钚价态至Pu(Ⅳ)的条件，对于钚质量浓度在10^-3g/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^-2g/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%。

Abstract: 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^-3g/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%.