论文部分内容阅读
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。
In this study, the electro-chemical extraction technique developed on the basis of liquid / liquid interface electrochemical method was used to study the accelerated transfer behavior of Pd ~ (2+) at the liquid / liquid interface. On the basis of above experiments, the quantitative electrochemistry extraction and separation of Pd 2+ were carried out. The effects of extraction potentials, extraction time and interference ions on the extraction percentage of Pd 2+ were investigated. The results show that 1,4,7,10-tetrathiocyclododecane can accelerate the transfer of Pd 2+ in water / 1,2-dichloroethane (W / DCE) interface under the strong acid system Under the optimal experimental conditions, the percentage of Pd 2+ extraction is up to 91.9%, which is unaffected by the interference of metal ions. This study can provide technical support and reserve for the separation of precious metal ions in complex systems such as high-level liquid waste.