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荒井 陽一; 渡部 創; 渡部 雅之; 新井 剛*; 勝木 健太*; 吾郷 友宏*; 藤川 寿治*; 武田 啓佑*; 福元 博基*; 保科 宏行*; et al.
Nuclear Instruments and Methods in Physics Research B, 554, p.165448_1 - 165448_10, 2024/09
被引用回数：0 パーセンタイル：0.00(Instruments & Instrumentation)Radioactive aqueous and organic liquid wastes contaminated by U and radioactive materials have been generated through solvent extraction experiments on nuclear fuel materials. Although incineration and denitrification / conversion processes are promising for treatment of such liquid wastes, installation of large equipment is essential. Treatment of liquid wastes generated from the reprocessing experiments is one of important tasks of Systematic Treatments of RAdioactive liquid wastes for Decommissioning (STRAD) project, and the recovery technologies of nuclear materials from the spent solvent has been developed. However, recovery of trace amounts of nuclear fuel material from aqueous solutions with wide pH range is still a challenging task. In our previous study, the porous silica particles with a high specific surface area bearing the iminodiacetic acid (IDA) functional group were revealed to be applicable to recover cations. Although the IDA group introduced adsorbents showed an excellent adsorption reaction from the aqueous solution, further improvement related to the adsorption amount is indispensable for application to the radioactive liquid treatment. In this study, fluorous ligands with IDA group were newly synthesized, and its complexation behavior with cations was investigated in order to understand the adsorption mechanism.
荒井 陽一; 長谷川 健太; 渡部 創; 渡部 雅之; 箕輪 一希*; 松浦 治明*; 羽倉 尚人*; 勝木 健太*; 新井 剛*; 小西 康裕*
Journal of Radioanalytical and Nuclear Chemistry, 333(7), p.3585 - 3593, 2024/07
被引用回数：1 パーセンタイル：35.82(Chemistry, Analytical)Radioactive aqueous and organic liquid wastes contaminated by U are generated by solvent extraction of nuclear fuel materials in experiments of reprocessing technologies. Although incineration and denitrification/conversion processes are promising for treating such liquid waste, the installation of large equipment is essential. To give appropriate treatment procedures for radioactive liquid waste generated in nuclear facilities, STRAD (Systematic Treatments of RAdioactive liquid wastes for Decommissioning) project was started by Japan Atomic Energy Agency (JAEA) with several organizations. We are focusing on baker's yeasts for their excellent metal ions adsorption characteristics, easy handling and low prices. In order to optimize adsorption performance and operation procedures as the liquid waste treatment technology, adsorption performance of U has to be precisely investigated. In this study, adsorption performance of U and anion from nitric acid solution was investigated by batch-wise adsorption experiments.
勝木 健太*; 石澤 健太*; 新井 剛*; 渡部 創; 佐野 雄一; 竹内 正行
no journal, ,
高レベル放射性廃液からのMA(III)分離回収技術の確立を目指し、TEHDGA含浸吸着材を用いたカラム分離スキームの検討を行った。本研究より、TEHDGA含浸吸着材において、コンディショニング液の硝酸濃度を2.8Mとすることでより効率的な分離スキームを構築できることが示唆された。
市原 大嗣*; 勝木 健太*; 新井 剛*; 渡部 創; 佐野 雄一; 竹内 正行
no journal, ,
抽出クロマトグラフィ法において、MA(III)・Ln(III)共回収工程のMA製品に含まれるMo(VI)及びSb(III)の選択的分離除去技術の確立を指向し、メタスズ酸(H
SnO
)の基礎吸着性能を評価した。本研究の成果よりメタスズ酸は、硝酸濃度0.1MにおいてMo(VI)及びSb(III)の分離が可能であることが示された。
