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硝酸塩共存下における4価テクネチウム溶解度

Solubility of technetium(IV) in NaNO$$_{3}$$ solutions

小林 大志*; 佐々木 隆之*; 北村 暁  

Kobayashi, Taishi*; Sasaki, Takayuki*; Kitamura, Akira

核種移行の性能評価上重要な4価テクネチウム溶解度に及ぼす硝酸塩の影響を明らかにするため、さまざまなNaNO$$_{3}$$濃度及びイオン強度条件下での4価テクネチウム水酸化物固相からの溶解反応を検討した。NaNO$$_{3}$$濃度又はイオン強度が高い場合、4価テクネチウム水酸化物固相からの溶解が促進されることがわかった。

We focused on the solubility of TcO$$_{2}$$.${it x}$H$$_{2}$$O(s) in the existence of the dilute to concentrated NaNO$$_{3}$$ in order to investigate the potential effect of nitrate on the Tc species. It was found that the solublity of TcO$$_{2}$$.${it x}$H$$_{2}$$O(s) was promoted under high NaNO$$_{3}$$ and/or electrolyte conditions.

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