Mechanism of Am(III) oxidation with ozone in carbonate solutions |
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| Authors: | A M Fedoseev V P Shilov |
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| Affiliation: | (1) Materials, School of Engineering, The University of Queensland, Brisbane, QLD, 4072, Australia;(2) Santos Ltd, Santos House, 91 King William Street, Adelaide, 5000, South Australia;(3) School of Mechanical Engineering, The University of Adelaide, Adelaide, 5005, South Australia |
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| Abstract: | The reaction of ozone with Am(III) in bicarbonate and carbonate solutions was studied by spectrophotometry. On adding ozone-saturated
water to a 2 × 10−4 M Am(III) solution in 1 M NaHCO3, about 1/3 of Am remains in the trivalent state and 2/3 is converted to Am(V), with no accumulation of Am(IV). The reaction
of Am(III) with ozone involves replacement of H2O molecules in the coordination sphere of Am(III) by O3 molecule, followed by elimination of the O2 molecule. The third O atom remains bonded with Am, converting it to the pentavalent state. |
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