【摘要】 HNO₃预平衡的30％TBP-煤油经γ辐照后对RuNO络合物有严重的保留作用,即不易用酸碱洗涤去除。将辐照溶剂分为碱萃相、水萃相和中性相,实验证明对Ru有保留作用的是中性相,而不是水萃相。进一步实验表明,造成辐照溶剂中Ru保留的主要是稀释剂的辐解产物。30％TBP-十二碳异羟肟酸-煤油对Ru有明显的保留作用。更多还原

【Abstract】 The retention of RuNO complexes in irradiated solvent is small for 30% TBP-kerosene, when TBP and kerosene are not per-equilibrated with HNOj before irradiation. If they are per-equilibrated with 1 mol/1 HNO3, the retention in kerosene or TBP is small, too, but retention in 30% TBP kerosene is quite large. The ruthenium retention increases with irradiated dose, aging time of loaded organic phase and concentration of pre-equili-brating nitric acid.The irradiated TBP-kerosene is treated by Becker’s Method, and Na2CO3 extract, H20 extract and neutral organic phase are collected, respectively. The ruthenium retention is small in H2O extract phase which could extract and retain 95Zr strongly. But the ruthenium retention in neutral phase is large.The experiments indicate that the compounds which retain Ru could be the degradation products of kerosene instead of TBP.The Ru retention in 30% TBP-kerosene-laurohydroxamic acid is obvious. And it increases with the concentration of .hydroxamic acid, aging temperature and time of loaded organic phase. If there is above 30 mg/ml uranium in the aqueous phase, the Ru retention in above system will not be influenced by NaNO2, although NaNO2 can destroy the hydrpxamic acid0更多还原