利用电化学萃取技术分离钯

Separation of palladium ions by electrochemical extraction

本研究采用液/液界面电化学方法及在此基础之上发展起来的电化学萃取技术研究了Pd^(2+)在液/液界面上加速转移行为。在上述实验基础之上,对Pd^(2+)进行了定量的电化学萃取分离,考察了萃取电位、萃取时间及干扰离子对Pd^(2+)萃取百分比的影响。研究结果表明,1,4,7,10-四硫代环十二烷可实现强酸体系下Pd^(2+)在水/1,2-二氯乙烷(W/DCE)界面上加速转移行为,在最优实验条件下,Pd^(2+)萃取百分比最高可达91.9%,且不受干扰金属离子的影响。本研究可为高放废液等复杂体系中贵金属离子的分离提供技术支持和储备。

The transfer of palladium ion（ Pd^（2＋）） across the micro-aqueous/1,2-dichloroethane（ W/DCE） interface facilitated by 1,4,7,10-tetratiacyclododecane（ TTCD） was investigated by cyclic voltammetry（ CV）. On the basis of the above experiments,Pd^（2＋）was separated by electrochemical extraction,and the influences of the extraction potential and time,as well as interfering ions were examined.The results showed that Pd^（2＋）can be easily extracted into the organic phase.Common ions,such as Na＋,Cs＋,Sr^（2＋）and Ba^（2＋）,do not interfere with the separation of Pd^（2＋）. Under the optimal experimental conditions,the extraction percentage of Pd^（2＋）can reach91. 9%. This research can provide technical support for the separation of noble metal ions in complex system,such as high level liquid waste.