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The process characteristics of a new solid-liquid Cs+ separation from the radioactive liquid waste using a crown ether dicyclohexano-18-crown-6 as an extractant and an ionic liquid of 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide were studied. The physicochemical properties of the precipitate containing Cs+ which is an solid-liquid extraction product were investigated to identify the solid-liquid phase separability and Cs+ loading. The Cs+ separation process performances were compared experimentally with those of the conventional adsorption system for pretreatment requirement and the amount of Cs+ waste. It was observed that the solid-liquid separation method using ILs has high Cs+ separation performance especially in the low Cs+ concentration. [ABSTRACT FROM AUTHOR]

Zinc hexacyanoferrate functionalized magnetic carbon nanotube composites were synthesized to be used as adsorbents for the selective removal of Cs. The synthesized adsorbents exhibited a high adsorption capacity that could be successfully improved by increasing the loading of zinc hexacyanoferrate, which plays a major role in selectively adsorbing and removing Cs from the adsorbent surface. Although the saturation magnetization value for the synthesized adsorbents decreased with increasing zinc hexacyanoferrate loading, the adsorbents could be sufficiently separated by using a permanent magnet. [ABSTRACT FROM AUTHOR]