Sorption distribution coefficients of selenium on a sandy mudstone under reducing conditions of underground

Iida, Yoshihisa ; Kimura, Yuichiro*; Yamaguchi, Tetsuji ; Ueda, Masato*; Tanaka, Tadao ; Nakayama, Shinichi

Sorption of radionuclides on rocks is an important factor for safety assessments of geologic disposal of radioactive wastes. Batch sorption tests were conducted to investigate effects of concentrations of NaNO $_{3}$ and NaCl on sorption distribution coefficients(Kd) of selenium(Se) on a sandy mudstone under reducing environment of underground. The rock and groundwater used in the tests were sampled from depths of 129-156 m with special care minimizing contact with air. Se was spiked as HSe $^{-}$ or Se $_{4}$ $^{2-}$ to the test solutions and kept as HSe $^{-}$ throughout the test periods by keeping reducing conditions (Eh, pH) of the solutions. Obtained Kd values were in a range of 0.015-0.037 m $^{3}$ kg $^{-1}$ , which were as high as those for a typical sorbing element, Cs.

Language	:	Japanese
Journal	:	Genshiryoku Bakkuendo Kenkyu
Volume	:	15
Number	:	2
Pages	:	p.57 - 67
Publication Year/Month	:	2009/03
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Paper URL	:	https://doi.org/10.3327/jnuce.15.57
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Keywords	:	no keyword
Research Facility	:	BECKY(バックエンド研究施設)
Press Release	:
Article of JAEA R&D Review	:	Mass Transport Retardation Studies in Bedrock; Sorption Experiments under Anoxic Conditions[/]
Cooperating Institute	:	経済産業省原子力安全・保安院

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Registration No. : AA20080518
JAEA Abstracts No. : 37001057
Paper Submission No. : 6052

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