【摘要】 研究了用不同浓度HNO₃预平衡和经γ辐照不同剂量后的TBP-煤油对⁹⁵Zr的萃取行为。测定了0.01mol/1HNO₃,5%Na₂CO₃洗涤后的有机相中⁹⁵Zr的保留百分率。比较了辐照后的TBP-煤油用碱和水萃洗分离得到的三个组份以及HDBP等7种辐解产物对⁹⁵Zr的萃取和洗涤后有机相中的保留情况。结果表明⁹⁵Zr的萃取和洗涤后的保留与溶剂所受的辐照剂量和预平衡酸度均有关系。在辐解产物中,单烷基长链酸性磷酸酯和异羟肟酸对Zr的萃取影响都较严重。前者在碱洗时容易产生乳化,而后者在碱洗后对Zr的保留更为严重。更多还原

【Abstract】 The extraction behaviour of ⁹⁵Zr with TBP-Kerosene irradiated by variousgamma doses （10²--10⁶Gy） is investigated. The distribution coefficient of ⁹⁵Zr andretentive percentages of ⁹⁵Zr in organic phase after scrubbing by 0.01 mol/1 HNO₃and 5% Na₂ CO₃ solution are determined. The TBP-Kerosene used in these tests ispre-equilibrated with various HNO₃ solution（0.5--5 mol/1） before irradiation. Theexperimental results show that the distribution coefficient of ⁹⁵Zr and retained⁹⁵Zr in scrubbed organic phase increase as doses and concentration of HNO₃increase. At doses>5×10⁴ Gy, the extraction of ⁹⁵Zr sharply increase with doses.At doses>10⁵Gy, ⁹⁵Zr in the orgenic phase is difficulty stripped by 5% Na₂CO₃solution and emulsion is easily formed. At doses 2×10⁶Gy and HNO₃≥3 mol/1,the retentive percentage of ⁹⁵Zr is >95%. Effect of seven degradation products added to 30% TBP-Kerosene on the extrac-tion and retention of ⁹⁵Zr are researched. The results indicate that the distributioncoefficients of ⁹⁵Zr with long chain monoalkylphosphate and hydroxamic acid arelarger than other compounds. When the organic phase is scrubbed with 5%Na₂ CO₃solution, the long chain monoalkylphosphate easily causes emulsion. But thehydroxamic acid is more difficultly scrubbed than long chain monoalkylphosphate by 5% Na₂ CO₃ solution.更多还原