冠醚萃取法从高放废液中去除锶Ⅲ．二环己基18冠6－辛醇－［2］对锶的萃取

EXTRACTION OF STRONIUM FROM HIGH-LEVEL ACTIVE WASTE WITH CROWN-ETHER Ⅲ.EXTRACTION OF STRONIUM WITH DICYCLOHEXYL-18-CROWN-6-OCTANOL-[2]

研究了在硝酸介质中二环已基１８冠６－辛醇－［２］对锶的萃取。结果表明，这种萃取体系对锶具有良好的萃取性能。同时还研究了水相硝酸浓度、平衡时间及锶浓度对萃取的影响。该萃取体系具有较快的反应动力学，锶浓度对萃取没有很大的影响。体系具有良好的反萃性能，可用去离子水作为反萃剂。从模拟高放废液中对锶和其它主要阳离子的萃取分离表明，该体系不仅对锶具有很好的萃取性能，而且对其它阳离子也具有很好的分离性能。

The extraction of stronium by dicyclohexyl-18-crown-6-octanol-[2] from nitric acid so-lutions is investigated.The effluences of the nitric acid,equilibrium time and stronium con-centration are studied.The results show that this extraction system has good dynamics,stronium concentration do not affect the distribution of stronium, water is a good strippingagent.The experiment of extraction stronium and another cation ion in.aqueous phase fromsynthetic HAW shows that this extraction system has high distribution of stronium and highseparation coefficient.This crown-ether-2-octanol extraction process can be used in recoveryof stronium from HAW.