Ion Exchange of Cesium on Potassium Nickel Hexacyanoferrate (II) s.

Mimura, Hidenori; Lehto, Jukka; Harjula, Risto

doi:10.3327/jnst.34.484

Cited by 71 publications

(27 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Prussian blue (PB) and its analogues (PBA) have been recognized as excellent adsorbents for cesium (Cs) in terms of its high adsorption selectivity (Fujita et al 2014;Mimura et al 1997;Thanapon et al 2010). Since the accident at the Fukushima Daiichi power plant, PB and PBA have attracted increasing attention as a material for use in decontaminating the environment.…”

Section: Introductionmentioning

confidence: 98%

Limitation of adsorptive penetration of cesium into Prussian blue crystallite

2015

View full text Add to dashboard Cite

The adsorption of cesium (Cs) onto Prussian blue (PB) with different crystallite sizes is investigated to examine the limitations of the adsorptive penetration of Cs ? into PB crystallite. The adsorption of Cs ? onto soluble PB occurs via ion exchange with a charge-compensation cation like K ? , which originally resides in the crystalline lattice. The ratio of the compensation cation sites that are replaced by Cs ? after adsorption time of 2 weeks significantly increases with decreasing crystallite size, meaning that the adsorption occurs only near the surface of the crystallite during the adsorption time. The depth of Cs ? penetration after 2 weeks is only within approximately 1-2 nm (or 1-2 units of the crystalline lattice) from the external surface of the crystallite at ambient temperature, regardless of the crystallite size. Hence, the crystallite size is the most important factor governing the adsorption performance.

show abstract

Section: Introductionmentioning

confidence: 98%

Limitation of adsorptive penetration of cesium into Prussian blue crystallite

2015

View full text Add to dashboard Cite

show abstract

“…On the other hands, cesium adsorbents have been studied for many years [2][3][4][5][6][7][8][9][10][11][12][13][14][15] , and recently developed for decontamination after the accidents of Fukushima Daiichi Nuclear Power Plants [16][17][18][19][20][21][22][23][24][25][26] . We have also developed radioactive cesium adsorbents based on a nonwoven fabric in which ammonium molybdophosphate (AMP) is supported by radiation-induced grafting method 27) .…”

Section: Introductionmentioning

confidence: 99%

The Volume Reduction Method of Radioactively-Contaminated Plant Waste through Extraction and Removal of Radioactive Cesium

Saiki¹,

Shibata²,

Hoshina³

et al. 2014

J.I.E.

View full text Add to dashboard Cite

A lot of contaminated wastes have been produced by decontamination works at contaminated areas around Fukushima prefecture, Japan, and piled up at temporary storage sites. At some temporary sites, it was found that leaching water was accumulated under stacks of contaminated "plant" wastes and contained radioactive cesium. To handle the wastes and the solution properly, decontamination tests of the leaching water were examined with molybdophosphate type cesium adsorbents synthesized by radiation-induced graft polymerization method. At batch adsorption tests, 75% of radioactive cesium was successfully removed with radiation graft cesium adsorbents. At column adsorption tests, radioactivity concentration of the leaching water could be reduced under 75 Bq/L as an indication of the provisional limit value up to around 500 times volume as large as an adsorbent volume. Moreover, brownish-red color of leaching water was succeeded to be decolored by amine type radiation graft adsorbents for water discharge. For development of volume reduction method of contaminated plant wastes, radioactive cesium extraction tests from the wastes and removal tests from the extracts were executed using contaminated oil cakes of sunflower seeds as a model of contaminated plant wastes. As a result, 65% of radioactive cesium was successfully extracted from the oil cakes to liquid phase, and more than 65% of radioactive cesium could be collected from the extract by radiation graft cesium adsorbents. These results showed a possibility of an application of these processes to volume reduction method for contaminated plant wastes.

show abstract

“…The hexacyanidoferrate(II)s are very small particulate matters and various methods are proposed to immobilize the hexacyanidoferrate(II)s on some gels, resins, cloths, and so on. 1,[8][9][10][11] Th e a d s o r p t i o n p r o p e r t i e s o f the immobilized hexacyanidoferrate(II)s should be investigated fundamentally for the practical use for the cesium removal. The desorption properties of the adsorbent are also important, because there are m a n y m a t e r i a l s a d s o r b i n g c e s i u m s e l e c t i ve l y a s hexacyanidoferrate(II)s in nature and their desorption properties should be known for the decontamination of the scattered radioactive cesium.…”

Section: Introductionmentioning

confidence: 99%

Separation of Cesium: Adsorption and Desorption Properties of Hexacyanidoferrate(II)s Immobilized in Silica Gel

Kai¹,

Uchiyama²,

Nanzai³

et al. 2014

J.I.E.

View full text Add to dashboard Cite

The adsorption properties of cesium ion and potassium ion to iron(III) hexacyanidoferrate(II) (IF) and copper(II) hexacyanidoferrate(II) (CF) immobilized in silica gel were investigated. The selectivity of cesium to potassium and the maximum adsorption amount were about the same for these adsorbents, but some adsorption properties were different for these adsorbents. The adsorption amount was dependent on the counter anion species and proton was desorbed alongside the adsorption of cations for IF, while the adsorption amount was independent on the counter anion species and proton was not desorbed alongside the adsorption for CF. The adsorption amount increased with the temperature for both adsorbents and the dependence on the temperature for IF was much more significant than that for CF.

show abstract

Ion Exchange of Cesium on Potassium Nickel Hexacyanoferrate (II) s.

Cited by 71 publications

References 13 publications

Limitation of adsorptive penetration of cesium into Prussian blue crystallite

Limitation of adsorptive penetration of cesium into Prussian blue crystallite

The Volume Reduction Method of Radioactively-Contaminated Plant Waste through Extraction and Removal of Radioactive Cesium

Separation of Cesium: Adsorption and Desorption Properties of Hexacyanidoferrate(II)s Immobilized in Silica Gel

Contact Info

Product

Resources

About