Oxidation of Am(III) in carbonate - bicarbonate solution by sodium perxenate
Journal Article
·
· Radiochemistry
OSTI ID:28613
The oxidation of Am(III) by Na{sub 4}XeO{sub 6} in KHCO{sub 3}, KHCO{sub 3} + K{sub 2}CO{sub 3}, and K{sub 2}CO{sub 3} solutions is studied by spectrophotometry. In 1.5M solutions (HCO{sub 3}{sup {minus}} + CO{sub 3}{sup 2{minus}}) with perxenate concentrations comparable to those of Am, Am(III) is quickly converted to a mixture of Am(IV) + Am(V) + Am(VI). In concentrated K{sub 2}CO{sub 3} solutions (5.9 M), Am(III) is in general not oxidized by perxenate. A mechanism is proposed for the oxidation of Am(III) by perxenate that includes the reaction of Am(III) with Xe(VIII) and possibly with Xe(VI). The reaction of Na{sub 4}XeO{sub 6} and Am(IV) was also investigated. In this instance Am(IV) was quickly converted to Am(V) and Am(VI).
- OSTI ID:
- 28613
- Journal Information:
- Radiochemistry, Journal Name: Radiochemistry Journal Issue: 3 Vol. 36; ISSN RDIOEO; ISSN 1066-3622
- Country of Publication:
- United States
- Language:
- English
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