首页> 外文期刊>Journal of Nuclear Materials: Materials Aspects of Fission and Fusion >Structural effects of calcination on Cs-exchanged copper hexacyanoferrate (Cs,K)(2)CuFe(CN)(6) loaded on mesoporous silica particles
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Structural effects of calcination on Cs-exchanged copper hexacyanoferrate (Cs,K)(2)CuFe(CN)(6) loaded on mesoporous silica particles

机译:在中孔二氧化硅颗粒上煅烧对Cs交换铜六氰基甲醛(Cs,K)(2)CuFe(CN)(6)的结构作用

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Porous silica particles functionalized by potassium copper hexacyanoferrate (KCu-HCF@silica) are investigated as selective sorbents to remove radioactive cesium from contaminated effluents. This article reports the thermal behavior of Cs:KCu-HCF@silica particles at the laboratory scale, in view of developing hot isostatic pressing processes to compact the Cs-loaded particles into dense waste forms. The data show that the spent particles cannot be hot-pressed directly because the release of volatile compounds does prevent compaction. Preliminary calcination in air leads to (i) the decomposition of Cs:KCu-HCF, (ii) the closure of the mesopores of silica and a reduction in the particles' specific surface area, (iii) the crystallization of silica into cristobalite, all without significant Cs loss. This retention of Cs is due to the insitu formation of a Cs based silicate glass with the siliceous particles. (C) 2019 Elsevier B.V. All rights reserved.
机译:通过铜六氰基甲醛(KCU-HCF @二氧化硅)官能化的多孔二氧化硅颗粒作为选择性吸附剂,以从受污染的流出物中除去放射性铯。 本文报告了在实验室规模的CS:KCu-HCF @二氧化硅颗粒的热行为,考虑到显影热的等静压过程以将Cs加载的颗粒压入密集的废物形式。 数据显示废颗粒不能直接热压,因为挥发性化合物的释放确实可以防止压实。 空气中的初步煅烧导致(i)Cs:Kcu-HCF,(ii)粒子的闭合二氧化硅的闭合和颗粒的比表面积,(iii)二氧化硅的结晶,全部 没有显着的cs损失。 CS的这种保留是由于CS基于基于Cs的硅酸盐玻璃的硅酸盐玻璃。 (c)2019 Elsevier B.v.保留所有权利。

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