Speciation of uranium in artificially weathered mica by X-ray absorption spectroscopy

Yomogida, Takumi ; Higashi, Kotaro*; Kawamura, Naomi*; Kitatsuji, Yoshihiro ; Takahashi, Yoshio*

Biotite, a layered silicate mineral, is known to be a host phase for uranium(U) in U mines. There are still many unclear factors regarding its U accumulation mechanism. In this study, U adsorption experiment was conducted on artificially weathered biotite by removing interlayer potassium. The results showed that the ratio of reduced species of U increased with increasing the K loss ratio in interlayer, indicating that U reduction occurred at cleavages developed by weathering of the biotite.

Language	:	Japanese
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Meeting title	:	日本放射化学会第67回討論会(2023)
Held date	:	2023/09
Location (city)	:	東広島
Location (country)	:	日本
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Keywords	:	Uranium; X-ray Absorption Near Edge Structure; biotite; HERFD-XANES
Research Facility	:	第4研究棟
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Registration No. : BB20230619
JAEA Abstracts No. :
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