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Radiolytic Yield of UIV Oxidation into UVI: A New Mechanism for UV Reactivity in Acidic Solution

Abstract : The yields of the radiolytic oxidation of UIV and of the UVI formation, measured by spectrophotometry, are found to be the same (G(−UIV)N2O = G(UVI)N2O = 8.4 × 10−7 mol J−1) and almost double the H2 formation yield (G(H2) = 4.4 × 10−7 mol J−1) in the 60Co γ radiolysis of N2O-aqueous solutions in the presence of 2 mol L−1 Cl− at pH = 0 (HCl). According to the mechanism of UIV radiolytic oxidation, we show that under the conditions of our experiments the UV ions do not disproportionate, but undergo a stoichiometric oxidation into UVI by H+ with forming H2.
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http://hal.in2p3.fr/in2p3-00457496
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Submitted on : Wednesday, February 17, 2010 - 3:02:49 PM
Last modification on : Thursday, January 7, 2021 - 2:10:03 PM

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E. Atinault, V. de Waele, J. Belloni, C. Le Naour, M. Fattahi, et al.. Radiolytic Yield of UIV Oxidation into UVI: A New Mechanism for UV Reactivity in Acidic Solution. Journal of Physical Chemistry A, American Chemical Society, 2010, 114, pp.2080-2085. ⟨10.1021/jp9051177⟩. ⟨in2p3-00457496⟩

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