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合理的なMA回収工程の構築に向けた溶媒抽出/低圧損抽出クロマトグラフィを組み合わせたハイブリッド型プロセスの開発,14; MA/Ln分離フローシートの構築に向けたNTAアミド含浸吸着材によるカラム分離試験

Hybrid process combining solvent extraction and low pressure loss extraction chromatography for a reasonable MA recovery, 14; Column experiments using an adsorbent impregnated with NTAamide to construct flow sheet for MA/Ln separation

江森 達也; 森田 圭介 ; 伴 康俊  ; 佐藤 広盛*; 新井 剛*; 佐野 雄一   

Emori, Tatsuya; Morita, Keisuke; Ban, Yasutoshi; Sato, Hiromori*; Arai, Tsuyoshi*; Sano, Yuichi

ニトリロトリアセトアミド(NTAアミド)の一種であるHONTA及びTOD2EHNTAをシリカビーズにそれぞれ含浸させた吸着材を作成し、核分裂生成物(FP),3価のランタノイド(Ln(III))及びマイナーアクチノイド(MA(III))に対する吸着特性を1段のバッチ吸着試験で明らかにした。バッチ試験の結果に基づき、硝酸濃度及び流量をパラメータとして、HONTA含浸吸着材を用いたカラム試験を実施し、FP、Ln(III)及びMA(III)の吸着・溶離挙動の評価を行った。

Two types of adsorbents were, respectively, prepared by impregnating nitrilotriacetamides (NTAamides) of HONTA and TOD2EHNTA in silica beads, and their adsorption properties for fission products (FPs), trivalent lanthanides (Ln(III)), and trivalent minor actinides (MA(III)) were clarified by single-stage batch experiments. Based on the results of the batch experiments, column experiments using HONTA adsorbents were performed by setting the nitric acid concentration and the flow rate of the eluents as parameters, and adsorption and elution behaviors of FPs, Ln(III) and MA(III) were evaluated.

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