The electroreduction (polarographically) of uranyl ion in nitric acid and nitric acid-methanol mixture media

✍ Scribed by M.A. Ghandour; R.A. Abo-Doma; E.A. Gomaa

• Publisher: Elsevier Science
• Year: 1982
• Tongue: English
• Weight: 386 KB
• Volume: 27
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/0013-4686(82)80075-3

✦ Synopsis

The polarographic reduction of uranyl ion in nitric acid solution are found to be one electron reduction mechanism at lower acid concentration (0.1 M HNO,) and two electron mechanism at high acid concentration (2 M HNO,). Methanol shifted the half wave potentials to more negative values and increased the free enerav.

The fee e&gies of reduction of U(V1) to U(V) in these mixed solvents sre inversely proportional to both the dielectric constants and Gutman's Acceptor number of methanol. The U(V) is stable at pH 3, but its dismutatioo increased at lower and higher pH's than pH 3.