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研究了 6 0 Co源辐照剂量及辐照前预平衡硝酸浓度对 30 % TRPO-煤油对 Pu的萃取行为的影响。测定了用 0 .6mol/L草酸反萃后有机相中保留的 Pu的百分率。比较了辐照后 30 % TRPO-煤油分离得到的碱萃物、水萃物及中性物3种组分对 Pu的保留情况以及酸性辐解产物二烷基膦酸和一烷基膦酸对 Pu的萃取和保留的影响。结果表明 ,辐照剂量对 Pu分配比影响较大而预平衡酸度的影响较小 ;Pu保留随剂量的增加而增大。辐照后分成的 3种组分中中性聚合物引起的保留最多 ;一烷基膦酸及二烷基膦酸对 Pu的萃取与保留的影响都很小
The effect of 30Co TRP-kerosene on the extraction of Pu was investigated at 60Co irradiation dose and the pre-equilibrium concentration of nitric acid before irradiation. The percentage of Pu remaining in the organic phase after stripping with 0.6 mol / L oxalic acid was determined. The retention of Pu by three components extracted from 30% TRPO-kerosene after irradiation was compared with that of acid dialkylphosphonic acid and monoalkylphosphonic acid Pu’s extraction and retention effects. The results showed that irradiation dose had a greater effect on the Pu distribution ratio than the pre-equilibrium acidity, and the Pu retention increased with the increase of the dose. Neutral polymers caused the most retention of the three components after irradiation; the effects of monoalkylphosphonic acid and dialkylphosphonic acid on the extraction and retention of Pu were very small