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MnO$$_{4}$$$$^{-}$$の還元により生成したMn酸化物に対するCo$$^{2+}$$の収着挙動

Sorption behavior of Co$$^{2+}$$ on manganese oxide formed by reduction of MnO$$_{4}$$$$^{-}$$

加藤 友彰 ; 大貫 敏彦; 斉藤 拓巳*; Yu, Q.

Kato, Tomoaki; Onuki, Toshihiko; Saito, Takumi*; Yu, Q.

放射性Coの回収技術開発を目的として、微生物細胞を還元剤とし生成したMn(IV)酸化物(biomasss-MnO$$_{x}$$)の形成機構とCo$$^{2+}$$の収着挙動について調べた。biomasss-MnO$$_{x}$$は、乳酸を還元剤として形成させたMnO$$_{x}$$よりも多くのCoを収着すること、MnO$$_{x}$$に収着したCoはCo(III)に酸化していることを明らかにした。

To develop a technology for recovering radioactive Co, we investigated the formation mechanism of Mn(IV) oxide (biomasss-MnO$$_{x}$$) prepared using bacterial cells as reducing agent and sorption behavior of Co$$^{2+}$$ on biomasss-MnO$$_{x}$$. We found that biomasss-MnO$$_{x}$$ sorbs more Co than the MnO$$_{x}$$ prepared using lactic acid as reducing agent and the Co sorbed on biomass-MnO$$_{x}$$ was oxidized to Co(III).

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