Continuous Separation of Cesium Based on NiHCF/PTCF Electrode by Electrochemically Switched Ion Exchange

• Published in: Chinese journal of chemical engineering Vol. 20; no. 5; pp. 837 - 842
• Main Author: 孙斌 郝晓刚 王忠德 张忠林 刘世斌 官国清
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.10.2012
• Subjects: Carbon; Cesium; cesium separation; Diaphragms; electrochemically switched ion exchange; Electrodes; Nickel; nickel hexacyanoferrate; porous carbon felt; Reactors; Separation; Three dimensional; 扫描电子显微镜; 电化学控制离子交换; 离子交换容量; 离子交换能力; 连续分离; 铁氰化镍; 铯离子; 镍电极; electrochemically switched ion exchange; porous carbon felt; cesium separation; nickel hexacyanoferrate
• ISSN: 1004-9541; 2210-321X
• DOI: 10.1016/S1004-9541(12)60407-8

Nickel hexacyanoferrate （NiHCF） film was synthesized on porous three-dimensional carbon felt （PTCF） substrate by repetitious batch chemical depositions, and the NiHCF/PTCF electrode was used as electrochemically switched ion exchange （ESIX） electrode in a packed bed for continuous separation for cesium ions. The morphologies of the prepared electrodes were characterized by scanning electron microscopy and the effects of solution concentration on the ion-exchange capacity of the electrodes were investigated by cyclic voltammetry technique. Cycling stability and long-term storage stability of NiHCF/PTCF electrodes were also studied. The NiHCF/PTCF electrodes with excellent ion-exchange ability were used to assemble a diaphragm-isolated ESIX reactor for cesium separation. Continuous separation of cesium and regeneration of NiHCF/PTCF electrode based on the diaphragm-isolated reactor were performed in a laboratory-scale two-electrode system.