Mutual separation of actinides from lanthanides using DTPA and DTBA as ligands and effect of adding amines

Sasaki, Yuji ; Kaneko, Masashi ; Ban, Yasutoshi

A selective back-extraction method using DTPA and DTBA as complexants has been developed for mutual separation of actinides and lanthanides (Ln) extracted by TODGA. A novel complexant of DTBA (diethlenetriamine-triaceticdiamide) had high solubility in water and strongly coordinated to Am under lower pH condition than that of DTPA. Multi-stage extraction experiments using DTPA and DTBA showed that the back-extraction ratios of Am and Ln were over 97% and under 3%, respectively. The effects of organic amines, such as ethlenediamine, on the complexation of Am and pH adjustment in the aqueous phase will also be presented.

Language	:	Japanese
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Meeting title	:	日本原子力学会2021年秋の大会
Held date	:	2021/09
Location (city)	:	札幌(online)
Location (country)	:	日本
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Keywords	:	ジグリコールアミド; 溶媒抽出; ランタノイド; アクチノイド; DTBA; DTPA; アミン
Research Facility	:	第4研究棟
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Registration No. : BB20210329
JAEA Abstracts No. :
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