Rapid Separation of Actinides Using an Anion-exchange Polymer Chain Grafted onto a Porous Sheet
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A diethylamino (DEA) group as an anion exchanger was introduced into a polymer chain grafted onto the pore surface of a porous sheet. The resultant porous sheet was cut into disks to fit a cylindrical cartridge (DEA cartridge) and the adsorption-elution behaviors for actinides were investigated. U and Pu in 10 <I>M</I> HCl-0.1 <I>M</I> HNO<SUB>3</SUB> were adsorbed on the DEA cartridge, and quantitative recoveries were achieved with 7 <I>M</I> HNO<SUB>3</SUB> and 1 <I>M</I> HCl, respectively. The elution curves of Pu with 10 <I>M</I> HCl-0.1 <I>M</I> HNO<SUB>3</SUB> and 1 <I>M</I> HCl overlapped irrespective of its flow rate. The flow rates of the loading and stripping solutions permeating through the pores of the DEA disk were 6-10 times higher than those through the interstices of an anion-exchange-resin-bead-packed column. The decontamination factors evaluated from a mutual separation of Am, U, and Pu were higher than 10<SUP>4</SUP> for both U and Pu fractions. The time required for the mutual separation was approximately 1 h.
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