Preparation of Extractant-impregnated Porous Sheets for High-speed Separation of Radionuclides
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概要
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A novel method of preparing for an extractant-impregnated porous sheet with high values of adsorption rate and capacity for metal ions is described. First, an epoxy-group-containing polymer chain was appended onto a commercially available porous sheet by radiation-induced graft polymerization of glycidyl methacrylate (GMA) . Second, <I>n</I>-octadecylamine was introduced into the graft chain via an epoxy-ring opening reaction. Third, bis (2-ethylhexyl) phosphate (HDEHP) was impregnated onto the <I>n</I>-octadecylamino group. An yttrium solution was forced to permeate through the pores of the HDEHP-impregnated porous sheet. The higher permeation rate of the yttrium solution led to the higher adsorption rate of yttrium ions because of a negligible diffusional mass-transfer resistance of the metal ions to the HDEHP impregnated.
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