Radiolytic Oxidation of Am (III) to Am(V) in NaCl Solutions

Abstract

A mericium /Radioly tic oxidation of km ¡Laser photoacoustic spectroscopy Abstract The autoradiolytic oxidation of 241 Am (III) to 241 Am (V) in 5 M NaCI solution has been investigated by pulsed laser-induced photoacoustic spectroscopy and spectrophotometry. In the presence of a moderate dose rate (1 Ci/L) of own α-radiation, the Am (III) ions are quantitatively oxidized to Am (V) within a week.

Hydrolysis Reactions of Am (II I) and Am(V)

“…The oxidation becomes completed within a week [17][18][19]. Radiolysis reactions induced by α-radiation transfer the NaCl solution to a strongly oxidizing medium.…”

“…While carrying out experiment, it is found that a-radiation induced radiolysis reactions in concentrated Nad solutions become significant, resulting in the oxidation of Am (111) to Am(V) [17][18][19]. For this reason the hydrolysis reactions of Am(V) have been also investigated in a selected saline solution.…”

A Direct Speciation of Transuranium Elements in Natural Aquatic Systems by Laser-Induced Photoacoustic Spectroscopy

“…9 shows autoradiolytic oxidation of Am(III) in 3M NaCl. The Am (III) hydroxide dissolves oxidatively in the solution of high oxidation potential created by a-radiolysis of chloride solution [ 14]. The resulting solution contains only the AmOÎ ion at first and turns out to form carbonate species by absorbing CO2 from air.…”

Preparation of Crystals of NpO2 and their Dissolution in Water, Saturated NaCl and 1 M NaHCO3

“…In the case of americium(III) hydroxide in presence of NaCl (5 mol/1) also an appreciably higher rate of oxidation to Am(V) was observed than in water [8]. It was explained by the influence of radiolysis of the NaQ solution.…”