title: Thermodynamics and mechanism studies on electrochemical removal of cesium ions from aqueous solution using a nanoparticle film of copper hexacyanoferrate.
abstract: Nanoparticle (NPs) film of copper hexacyanoferrate (CuHCF(III)) was developed for electrochemically cesium separation from wastewater. Different form the electro- or chemical deposited films, CuHCF(III) NPs were firstly covered with ferrocyanide anions, so that they can be well dispersed in water and formed ink. Then CuHCF(III) NPs can be uniformly coated by simple wet printing methods, so it is feasible to prepare NPs film of any sizes, or any patterns at low cost. This process provided a promising technology for preparing large scale electrodes for sequential removal of Cs from wastewater in the columns. Cs separation can be controlled by an electrically switched ion exchange (ESIX) system. Effect of temperatures, and ionic strength on Cs removal was investigated. Thermodynamics results showed that Cs adsorption process was exothermic in nature and favored at low temperature. Ionic strength study indicated the CuHCF(III) film can selectively separate Cs in wide ionic strength range from 1 × 10(-4) to 1 × 10(-1) M Na(+). XPS results demonstrated that the electrochemical oxidation-reduction of Fe (II/III) made contributions to Cs separation.
authors.affiliation: Nanosystem Research Institute, National Institute of Advanced Industrial Science and Technology , Tsukuba, 305-8565, Japan.
authors.forename: Rongzhi
authors.initials: R
authors.lastname: Chen
authors.forename: Hisashi
authors.initials: H
authors.lastname: Tanaka
authors.forename: Tohru
authors.initials: T
authors.lastname: Kawamoto
authors.forename: Miyuki
authors.initials: M
authors.lastname: Asai
authors.forename: Chikako
authors.initials: C
authors.lastname: Fukushima
authors.forename: Masato
authors.initials: M
authors.lastname: Kurihara
authors.forename: Manabu
authors.initials: M
authors.lastname: Ishizaki
authors.forename: Masayuki
authors.initials: M
authors.lastname: Watanabe
authors.forename: Makoto
authors.initials: M
authors.lastname: Arisaka
authors.forename: Takuya
authors.initials: T
authors.lastname: Nankawa
mesh_terms: D002586:Cesium / Q000737:chemistry* / Q000633:toxicity; D003300:Copper / Q000737:chemistry*; D005295:Ferrocyanides / Q000737:chemistry; D006801:Humans; D053758:Nanoparticles / Q000737:chemistry*; D013816:Thermodynamics; D062065:Wastewater; D014874:Water Pollutants, Chemical; D018508:Water Purification
chemical_list: D002586:Cesium; D003300:Copper; D005295:Ferrocyanides; D062065:Wastewater; D014874:Water Pollutants, Chemical; C116383:ferrocyn