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Electrochemical studies on uranium in the presence of organic acids

Suzuki, Yoshinori; Nankawa, Takuya; Ozaki, Takuo; Onuki, Toshihiko; Francis, A. J.*; Enokida, Yoichi*; Yamamoto, Ichiro*

We examined electrochemical redox reactions of UO$$_{2}$$$$^{2+}$$ in organic acid (oxalic, malonic, succinic, adipic, L-malic, and L-tartaric acids) solutions using cyclic voltammetry. A redox reaction of UO$$_{2}$$$$^{2+}$$/UO$$_{2}$$$$^{+}$$ and an oxidation reaction of U(IV) were observed. The peak potentials of the UO$$_{2}$$$$^{2+}$$ reduction showed a good linear relationship with the log of the stability constants of 1:1 UO$$_{2}$$$$^{2+}$$-organic complexes. We also revealed the redox reactions of UO$$_{2}$$$$^{2+}$$ in the presence of malonic or oxalic acids between pH 1 and 6.

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Category:Nuclear Science & Technology

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