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Extraction chromatographic separation of trivalent minor actinides using ${it i}$Hex-BTP/SiO$$_{2}$$-P resin

${it i}$Hex-BTP/SiO$$_{2}$$-Pレジンを用いた三価マイナーアクチニドの抽出クロマトグラフィー分離

駿河谷 直樹 ; 佐野 雄一 ; 山本 昌彦  ; 黒沢 明; 檜山 敏明

Surugaya, Naoki; Sano, Yuichi; Yamamoto, Masahiko; Kurosawa, Akira; Hiyama, Toshiaki

Extraction chromatographic separation of the long-lived trivalent minor actinides, Am(III) and Cm(III), has been performed to study the potential application of 2,6-bis(5,6-di-iso-hexyl-1,2,4-triazin-3-yl)-pyridine (${it i}$Hex-BTP) impregnated into the porous silica support coated with styrene-divinylbenzene (SiO$$_{2}$$-P). The adsorption and elution characteristics of Am(III) and Cm(III) in nitric acid media have been investigated under some acid conditions to separate them from lanthanides using a column packed with ${it i}$Hex-BTP/SiO$$_{2}$$-P resins. Depending on the concentration of nitric acid solution as well as aqueous flow rate, a certain condition allowed us to selectively recover the fractions containing Am(III) and Cm(III) in a feed sample solution derived from PUREX raffinate. The proposed separation procedure and extraction profiles will be discussed in this presentation.

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