Preparation of a film of copper hexacyanoferrate nanoparticles for electrochemical removal of cesium from radioactive wastewater

• Published in: Electrochemistry communications Vol. 25; pp. 23 - 25
• Main Authors: Chen, Rongzhi, Tanaka, Hisashi, Kawamoto, Tohru, Asai, Miyuki, Fukushima, Chikako, Kurihara, Masato, Watanabe, Masayuki, Arisaka, Makoto, Nankawa, Takuya
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01.11.2012; Amsterdam Elsevier; New York, NY
• Subjects: Applied sciences; Copper hexacyanoferrate; Electrochemical separation; Exact sciences and technology; General purification processes; Nanoparticle film; Other wastewaters; Pollution; Radioactive cesium; Switchable operation; Wastewaters; Water treatment and pollution; Copper hexacyanoferrate; Switchable operation; Electrochemical separation; Radioactive cesium; Nanoparticle film; Removal; Atomic force microscopy; Scanning electron microscopy; Separation; Electrochemical method; Nanoparticle; Cesium; Transition metal Complexes; Alkali metal; X ray diffraction; Field emission microscopy; Copper Hexacyanoferrates; Surface structure; Electrodes; Redox couple; Morphology; Preparation; Waste water purification
• ISSN: 1388-2481; 1873-1902
• DOI: 10.1016/j.elecom.2012.09.012

We first synthesized water-dispersed nanoparticle copper hexacyanoferrate (CuHCF) ink and then coated its nanoparticles on electrodes to electrochemically remove cesium from wastewater. Cesium uptake and elution can be controlled by switching the potentials between anodes and cathodes. Effective cesium removal can be adopted in a large pH range from 0.2 to 8.9, and in the presence of several diverse coexisting alkaline cations, suggesting that it can be taken as a promising technology for actual radioactive wastewater treatment. The prepared CuHCF nanoparticles can be simply and uniformly coated on electrodes by wet process like conventional printing methods, so any sizes or patterns are feasible at low cost, which indicated the potential as a promising sorption electrode of large size in the columns for sequential removal and recycle of Cs from wastewater. [Display omitted] ► CuHCF nanoparticles (NPs) were surface-capped with [FeII(CN)6]4− to well disperse in water. ► CuHCF NP film can be simply and uniformly coated on electrodes of any size for Cs removal. ► Cs uptake and elution can be simply controlled by modulating the potential of CuHCF NP film. ► Effective Cs removal can be adopted in a large pH range of 0.2–8.9. ► CuHCF NP film can selectively separate Cs in the presence of coexisting alkaline cations.