検索対象:     
報告書番号:
※ 半角英数字
 年 ~ 
 年

Sorption behavior of U and Np on zeolite

ゼオライトへのU, Npの収着挙動

石寺 孝充; 舘 幸男; 赤木 洋介*; 芦田 敬

Ishidera, Takamitsu; Tachi, Yukio; Akagi, Yosuke*; Ashida, Takashi

福島第一原子力発電所の汚染水処理に使用されているゼオライト中のU, Npのインベントリを評価するため、バッチ収着試験を実施した。その結果、人工海水を10%に希釈した溶液中でのUの収着分配係数が高い値を示したのに対し、人工海水中でのUの収着分配係数は低い値を示した。一方、Npの収着分配係数は人工海水の濃度によらず低い値を示した。ナトリウムイオンと全炭酸濃度をパラメーターにバッチ収着試験を実施した結果、Uの収着分配係数は全炭酸濃度によって大きく異なることがわかり、ゼオライト中の放射性核種のインベントリ評価には、核種の溶存化学種の変化を考慮に入れる必要があることが示唆された。

In Fukushima Daiichi Nuclear Power Station, radionuclides are removed from contaminated water by the decontamination system using zeolite. In this study, sorption properties of U and Np on zeolite were investigated by batch sorption experiments to obtain fundamental information for predicting the radionuclides inventory. High distribution coefficients were observed for U in the simulated sea water diluted 10 times by deionized water. In contrast, low distribution coefficient of U was observed in simulated sea water. Low distribution coefficients were observed for Np independent of simulated sea water concentration. Batch sorption experiments of U carried out as functions of sodium ion and total inorganic carbon concentration suggested that the distribution coefficient of U was strongly affected by the total inorganic carbon concentration. This result suggests that aqueous species of radionuclides and their sorption behavior need to be considered to estimate the inventory of radionuclides in zeolite.

Access

:

- Accesses

InCites™

:

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.