Selective removal of cesium ions from wastewater using copper hexacyanoferrate nanofilms in an electrochemical system

Chen, Rongzhi; Tanaka, Hidemi; Kawamoto, T.; Asai, Miyuki; Fukushima, Chikako; Na, Haitao; Kurihara, Masato; Watanabe, Masayuki; Arisaka, Makoto; Nankawa, Takuya

doi:10.1016/j.electacta.2012.08.124

Cited by 119 publications

(49 citation statements)

References 28 publications

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“…In this case, best performance was achieved with copper and nickel ferrocyanides, which showed an order of magnitude greater d for cesium, than cobalt ferrocyanide (Table 2a and b). These results are consistent with previous studies [6,8,[20][21][22], e.g. Sirakanyan et al [14] observed a similar trend for the adsorption of cesium using different ferrocyanides.…”

Section: Sorption Characteristics Of Unmodified Sorbents and Pure Fersupporting

confidence: 94%

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The use of composite ferrocyanide materials for treatment of high salinity liquid radioactive wastes rich in cesium isotopes

Toropov¹,

Satayeva

Mikhalovsky³

et al. 2014

Radiochimica Acta

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The use of composite materials based on metal ferrocyanides combined with natural mineral sorbents for treatment of high salinity Cs-containing liquid radioactive waste (LRW) was investigated. The study indicated that among the investigated composites, the best sorption characteristics for Cs were shown by materials based on copper ferrocyanide. Several factors affecting the removal of cesium from LRW, namely total salt content, pH and organic matter content, were also investigated. High concentrations of complexing organic matter significantly reduced the sorption capacity of ferrocyanide sorbents

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Section: Sorption Characteristics Of Unmodified Sorbents and Pure Fersupporting

confidence: 94%

“…The best sorption properties in relation to cesium were provided by composites based on copper ferrocyanide, and this may be a result of the greater replacement of copper in ion exchange reactions when compared to other metal ferrocyanides [22][23][24].…”

Section: Cu +mentioning

confidence: 99%

The use of composite ferrocyanide materials for treatment of high salinity liquid radioactive wastes rich in cesium isotopes

Toropov¹,

Satayeva

Mikhalovsky³

et al. 2014

Radiochimica Acta

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“…7(d). At pH 12, the removal performance (97.8 %) slightly deteriorated, which may be attributed to the decomposition of HCF in a high alkaline condition as reported in previous studies [1,24,45,51]. This decomposition is supported by the detected amounts of Cu in solution using ICP-MS. …”

Section: Adsorption Kineticssupporting

confidence: 66%

Solvent-assisted synthesis of potassium copper hexacyanoferrate embedded 3D-interconnected porous hydrogel for highly selective and rapid cesium ion removal

Kim

et al. 2017

Journal of Environmental Chemical Engineering

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Poly(vinyl alcohol) hydrogel. 2The KCuHCF embedded PVA-Citric acid hydrogel adsorbent was synthesized through a facile twostep method for the selective and rapid Cs + removal. 3 Highlights The HPC was synthesized by a noble solvent-assisted method. The HPC showed superior Cs + removal capacity of 667 mg/g KCuHCF. The HPC retained remarkable Cs + removal efficiency of 99.5 % in 30 min. In a wide pH range from 2 to 10, the HPC displayed stable Cs + removal effi ciency. Moreover, the adsorbent revealed stable and high Cs + removal efficiency of 99.9 % across a wide pH range from 2 to 10. The kinetics of Cs + removal was remarkably rapid with 99.5% removal achieved within 30 min from a dilute Cs + solution (9.18 ppm). When using seawater, the HPC exhibited almost unaltered Cs + removal efficiency above 99.5 %, and high distribution coefficient K d value of 7.7 10 5 mL/g at an extremely low Cs + concentration (0.67 ppm, V/m = 1000 ml/g), whichhighlighted the tremendous affinity for Cs + .5

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“…Transition metal hexacyanoferrate, especially nickel hexacyanoferrate (NiHCF), is well known as a highly selective agent for cesium adsorption [22]. It has a special cubic structure with a channel diameter of about 3.2 Å, through which only small hydrated ions like cesium ions can permeate while larger hydrated ions like sodium ions get blocked [23].…”

Section: Introductionmentioning

confidence: 99%

Removal of cesium ions from waste solution using sericite incorporated into nickel hexacyanoferrate

Jeon

Cha

2015

Korean J. Chem. Eng.

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To increase adsorption capacity and selectivity for cesium ions from waste solution, sericite was chemically modified by means of nickel hexacyanoferrate (NiHCF) with a high selectivity trap agent for cesium. Scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) spectroscopy were used for the characteristic analysis of surface onto the NiHCF-sericite. The adsorption capacity of cesium ions for the NiHCF-sericite increased about 2.5 times, as compared with natural sericite at initial pH 5.0 of waste solution. Adsorption equilibrium was investigated by Langmuir and Freundlich isotherm model, respectively. Maximum adsorption capacity was estimated as 16.583 mg/g, and the Langmuir isotherm fits the adsorption data better than Freundlich model. The adsorption process was determined as an exothermic reaction and all adsorption was completed in 30 min. In addition, the adsorption capacity of cesium ions was not greatly affected by ionic strength (~0.1 M NaCl concentration) and other metals in mixed waste solution.

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Selective removal of cesium ions from wastewater using copper hexacyanoferrate nanofilms in an electrochemical system

Cited by 119 publications

References 28 publications

The use of composite ferrocyanide materials for treatment of high salinity liquid radioactive wastes rich in cesium isotopes

The use of composite ferrocyanide materials for treatment of high salinity liquid radioactive wastes rich in cesium isotopes

Solvent-assisted synthesis of potassium copper hexacyanoferrate embedded 3D-interconnected porous hydrogel for highly selective and rapid cesium ion removal

Removal of cesium ions from waste solution using sericite incorporated into nickel hexacyanoferrate

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