Journal ArticleDOI
Hybrid grafted ion exchanger for decontamination of radioactive cesium in Fukushima Prefecture and other contaminated areas
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TLDR
In this article, a material that can be used to remove cesium (Cs) in Fukushima Prefecture and other contaminated areas was developed by radiation-induced graft polymerization of ammonium 12-molybdophosphate and acrylonitrile onto nonwoven polyethylene fabric.Abstract:
We have developed a material that can be used to remove cesium (Cs) in Fukushima Prefecture and other contaminated areas. The developed material was prepared by radiation-induced graft polymerization of ammonium 12-molybdophosphate and acrylonitrile onto nonwoven polyethylene fabric. To evaluate the adsorption performance of the developed material, we conducted batch and column experiments by using a Cs solution with a concentration of 1 ppm at pH 7. In the batch study, the adsorbent was able to remove 90, 87 and 64 % of Cs from pure water, acidic water and seawater, respectively. In the column study, adsorbent packed in a column with a diameter of 7 mm and a height of 5 cm was able to remove nearly the entire amount of dissolved Cs. The solution (1 ppm Cs at pH 7) was pumped into the column at a space velocity of 300 h−1, in which the Cs adsorption capacity at the breakthrough point reached 54 g-Cs/kg-adsorbent. Adsorbent grafted into a cartridge with a diameter of 4 cm and a height of 3.8 cm was used in a field test on removing dissolved radioactive Cs in Iitate-mura, and this test was conducted successfully.read more
Citations
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Radioactive cesium removal from nuclear wastewater by novel inorganic and conjugate adsorbents
Md. Rabiul Awual,Shinichi Suzuki,Tomitsugu Taguchi,Hideaki Shiwaku,Yoshihiro Okamoto,Tsuyoshi Yaita +5 more
TL;DR: In this paper, promising inorganic and ligand immobilized conjugate materials for selective and high capacity of radioactive cesium removal from radioactive liquid waste in Fukushima after an accident at Daiichi Nuclear Power Plant hit by the Great East Japan Earthquake and tsunami on 11 March 2011.
Journal ArticleDOI
Selective cesium removal from radioactive liquid waste by crown ether immobilized new class conjugate adsorbent.
Md. Rabiul Awual,Tsuyoshi Yaita,Tomitsugu Taguchi,Hideaki Shiwaku,Shinichi Suzuki,Yoshihiro Okamoto +5 more
TL;DR: The obtained results revealed that adsorbent had higher selectivity toward Cs even in the presence of a high concentration of Na and K and this is probably due to the Cs-π interaction of the benzene ring.
Journal ArticleDOI
Proton-exchange mechanism of specific Cs+ adsorption via lattice defect sites of Prussian blue filled with coordination and crystallization water molecules
Manabu Ishizaki,S. Akiba,A. Ohtani,Yuji Hoshi,Kenta Ono,M. Matsuba,Takanari Togashi,K. Kananizuka,Masatomi Sakamoto,Masatomi Sakamoto,Akira Takahashi,Tohru Kawamoto,Hisashi Tanaka,Masayuki Watanabe,Makoto Arisaka,Takuya Nankawa,Masato Kurihara,Masato Kurihara +17 more
TL;DR: The synthesised PB-1, by a common stoichiometric aqueous reaction between 4Fe(3+) and 3[Fe(II)(CN)6](4-), showed much more efficient Cs(+) adsorption ability than did the commercially available PB-2.
Journal ArticleDOI
Enhanced adsorption of cesium on PVA-alginate encapsulated Prussian blue-graphene oxide hydrogel beads in a fixed-bed column system
Jiseon Jang,Dae Sung Lee +1 more
TL;DR: The Yoon-Nelson model was found to provide the best representation for cesium adsorption on the adsorbent, based on the χ(2) analysis.
Journal ArticleDOI
Immobilization of inorganic ion-exchanger into biopolymer foams – Application to cesium sorption
TL;DR: In this paper, the pseudo-second order rate equation fits well kinetic profiles: the rate coefficient increases with the flow rate of recirculation, as an evidence of the control of uptake kinetics by diffusion properties.
References
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Journal ArticleDOI
Extraction of cesium ions from aqueous solutions using calix[4]arene-bis(tert-octylbenzo-crown-6) in ionic liquids
Huimin Luo,Sheng Dai,Peter V. Bonnesen,A. C. Buchanan,John D. Holbrey,Nicholas J. Bridges,Robin D. Rogers +6 more
TL;DR: Solvent extraction of cesium ions from aqueous solution to hydrophobic ionic liquids without the introduction of an organophilic anion in the aqueously phase was demonstrated using calix[4]arene-bis(tert-octylbenzo-crown-6) (BOBCalixC6) as an extractant.
Journal ArticleDOI
Rubidium and cesium ion adsorption by an ammonium molybdophosphate–calcium alginate composite adsorbent
TL;DR: In this article, a composite spherical adsorbent was prepared with ammonium molybdophosphate (AMP), sodium alginate (NaALG), and calcium chloride, and the adsorption of both rubidium and cesium ions onto the composite was investigated comprehensively by varying the initial metal ion concentration, pH, ionic strength and temperature.
Journal ArticleDOI
Composite ion exchanger with ammonium molybdophosphate and its properties
F. Šebesta,V. Štefula +1 more
TL;DR: In this article, an organic binding polymer based on polyacrylonitrile (PAN) was used for the preparation of the composite exchanger containing ammonium molybdophosphate (AMP) as the active component.
Journal ArticleDOI
Cesium sorption from concentrated acidic tank wastes using ammonium molybdophosphate-polyacrylonitrile composite sorbents
TL;DR: In this article, AMP-PAN composite sorbents have been evaluated for the removal of cesium from Idaho National Engineering and Environmental Laboratory (INEEL) concentrated acidic tank waste.
Journal ArticleDOI
Rapid removal of arsenic(V) by zirconium(IV) loaded phosphoric chelate adsorbent synthesized by radiation induced graft polymerization
TL;DR: In this paper, a fibrous arsenic-phosphoric adsorbent was synthesized by loading zirconium(Zr) on fibrous phosphoric adaption.