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

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 ces...

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Bibliographic Details
Published in:Electrochemistry communications 2012-11, Vol.25, p.23-25
Main Authors: Chen, Rongzhi, Tanaka, Hisashi, Kawamoto, Tohru, Asai, Miyuki, Fukushima, Chikako, Kurihara, Masato, Watanabe, Masayuki, Arisaka, Makoto, Nankawa, Takuya
Format: Article
Language:English
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
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Summary: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.
ISSN:1388-2481
1873-1902
DOI:10.1016/j.elecom.2012.09.012