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KMID : 1059519850290020121
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Journal of the Korean Chemical Society
1985 Volume.29 No. 2 p.121 ~ p.128
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Electrochemical Reduction of Uranyl Ion in Aqueous Basic Solutions
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Pak Chong-Min
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Abstract
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The electrochemical reduction of uranyl ion in aqueous basic media has been examined by d. c. polarography, differential pulsed polarography and cyclic voltammetry. From voltammograms obtained in uranyl solutions containing 0.1M sodium bicarbonate, either with or without the same amounts of sodium tripolyphosphate it is concluded that the first wave corresponds to the reduction of UO22+ to UO2+. It is assumed that the uranyl ion undergoes appreciable hydrolysis in these media. The hydrolysis product UO2OH+ from UO22+ is not reduced at the first wave, but is reduced at the second wave together with UO22+. The diffusion current was found proportional to the uranyl concentration in a range between 7.5 × 10-4 and 3.75 × 10-3M.
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