Chemical Processing Wastes. Recovering Fission Products

Barton, G.B.; Hepworth, J.L.; McClanahan, E.D.; Moore, R.L.; Tuyl, H.H. Van

doi:10.1021/ie50578a039

Cited by 99 publications

(33 citation statements)

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“…Third, low-level radioactive water is found in distant locations in Japan; thus, treating systems must be portable and easy to operate. 4 Prussian blue (ferric hexacyanoferrate), one of the first, man-made coordination compounds, widely known as "the blue pigment", has long been considered a potential adsorbent for radioactive cesium-137 [3]. However, due to its intrinsic property of forming a colloid in water, small sized Prussian blue particles (thereby the larger surface areas and the higher adsorbing capacity) can easily contaminate water; thus, practical applications have long been limited to medical and/or pharmaceutical treatments [4,5].…”

Section: Introductionmentioning

confidence: 99%

Prussian blue caged in spongiform adsorbents using diatomite and carbon nanotubes for elimination of cesium

Fugetsu

et al. 2012

Journal of Hazardous Materials

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We developed a spongiform adsorbent that contains Prussian blue, which showed a high capacity for eliminating cesium. An in situ synthesizing approach was used to synthesize Prussian blue inside diatomite cavities. Highly dispersed carbon nanotubes (CNTs) were used to form CNT networks that coated the diatomite to seal in the Prussian blue particles. These ternary (CNT/diatomite/Prussian-blue) composites were mixed with polyurethane (PU) prepolymers to produce a quaternary (PU/CNT/diatomite/Prussian-blue), spongiform adsorbent with an in situ foaming procedure. Prussian blue was permanently immobilized in the cell walls of the spongiform matrix and preferentially adsorbed cesium with a theoretical capacity of 168 mg/g cesium. Cesium was absorbed primarily by an ion-exchange mechanism, and the absorption was accomplished by self-uptake of radioactive water by the quaternary spongiform adsorbent

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Section: Introductionmentioning

confidence: 99%

Prussian blue caged in spongiform adsorbents using diatomite and carbon nanotubes for elimination of cesium

Fugetsu

et al. 2012

Journal of Hazardous Materials

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“…Hexacyanoferrates(II) and -(III) of several transition metals have a high affinity for cesium over a wide pH range and good resistance to ionizing radiation (1)(2)(3)(4)(5)(6). Although the preparation and use of hexacyanoferrates for the removal of cesium from solutions by sorption or precipitation have been studied over the past 40 years, the results remain mostly empirical and the choice of the best composition of On leave from CSIC, Instituto de Quimica Organica General, Juan de la Cierva 3, 28006 Madrid, Spain…”

Section: Introductionmentioning

confidence: 99%

Sorption Mechanisms of Cesium on CuII2FeII(CN)6and CuII3[FeIII(CN)6]2Hexacyanoferrates and Their Relation to the Crystalline Structure

Ayrault

Jiménez

Garnier

et al. 1998

Journal of Solid State Chemistry

115

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“…The principle of the Fer method for removal of Cs is reviewed in literatures [19][20][21], as well as in our previous report [5,6]. In brief, the method utilizes the extremely high affinity of the Cs cation to insoluble Fer compounds.…”

Section: Principle Of Ferrocyanide Coprecipitation For Cs Removalmentioning

confidence: 99%

Extractability and Chemical Forms of Radioactive Cesium in Designated Wastes Investigated in an On-Site Test

Fujikawa

Ozaki

Chen

et al. 2016

Radiological Issues for Fukushima’s Revitalized Future

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In the aftermath of the 2011 accident at Fukushima Daiichi Nuclear Power Plant (F1 hereafter), municipal solid waste (MSW) contaminated with radioactive cesium (rad-Cs hereafter) has been generated in 12 prefectures in Japan. The Japanese Minister of Environment classified MSW that contained rad-Cs in the concentration more than 8,000 Bq/kg as "designated (solid) waste (DSW hereafter), and prescribed the collection, storage and transportation procedures. When MSW containing rad-Cs was incinerated, rad-Cs was concentrated in fly ash, and the ash often fell into the category of DSW. We have investigated a technique that can reduce the volume of the rad-Cs-contaminated fly-ash by extracting rad-Cs with aqueous solvents such as water and oxalic acid and concentrating rad-Cs in a small amount of hexacyanoferrate (or ferrocyanide, designated as Fer hereafter) precipitate. Since DSW could not be transported to the outside laboratory, we have conducted on-site tests at places where DSW were generated to investigate the applicability of the extraction -precipitation technique.The present report is a summary of our most recent on-site test conducted in 2014. Also presented is the re-evaluation of the results of our past on-site test from the viewpoint of leaching of rad-Cs and heavy metals in the fly ash. An apparent decrease in leaching of rad-Cs from fly ash was observed by incinerating sewage sludge with soil. Fly ash from a melting furnace contained more water-soluble radCs than that from a fluidized-bed incinerator. Some incinerator fly ash appeared to Y. Fujikawa ( )

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Chemical Processing Wastes. Recovering Fission Products

Cited by 99 publications

References 0 publications

Prussian blue caged in spongiform adsorbents using diatomite and carbon nanotubes for elimination of cesium

Prussian blue caged in spongiform adsorbents using diatomite and carbon nanotubes for elimination of cesium

Sorption Mechanisms of Cesium on CuII2FeII(CN)6and CuII3[FeIII(CN)6]2Hexacyanoferrates and Their Relation to the Crystalline Structure

Extractability and Chemical Forms of Radioactive Cesium in Designated Wastes Investigated in an On-Site Test

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