中文摘要：

文章研究了硝酸介质中二环己基-18-冠醚-6（DCH18C6）对锶的萃取行为。通过考察稀释剂、相比（O/A）、萃取剂浓度及硝酸浓度对萃取过程中分配比和萃取率的影响,得出了DCH18C6在硝酸介质中对Sr^2＋的萃取规律。实验结果表明,该萃取体系在硝酸介质中能够有效地萃取锶,在萃取相比为1∶4,DCH18C6的浓度为0.1 mol/L,硝酸浓度为1.0 mol/L时,一次萃取率高于90%,用去离子水反萃四次,反萃率可达100%。

英文摘要：

The extraction of strontium with dicyclohexyl- 18- crown- 6 from nitric acid solution was investigated and the influence of the ratios of the extraction phase（ O /A）,the concentration of DCH18C6,different diluents and the concentration of nitric acid was examined. The best ratios of the extraction phase（ O /A）,diluents and the concentration of nitric acid conditions were obtained. The results showed thant strontium can be efficiently extracted by DCH18C6dissolved in 1,1,2,2- tetrachloroethane from a nitric acid solution. The extraction percentage of Sr^2＋ was found to be higher than 90% when the O /A was 1 ∶ 4,the concentration of DCH18C6was 0. 1 mol /L and the concentration of HNO3was 1. 0 mol /L. The extracted Sr2 ＋can be easily stripped with deionized water. Nearly 100% recovery of Sr^2＋ was achieved by four times of such stripping.