Photooxidation of americium(III) by water in bicarbonate-carbonate solutions
Journal Article
·
· High Energy Chemistry
OSTI ID:166700
- Institute of Physical Chemistry, Moscow (Russian Federation)
The effects of ultraviolet (UV) and visible light on aqueous Am(III) solutions (1.1 x 10{sup -4} mol/l) containing KHCO{sub 3} or K{sub 2}CO{sub 3} or K{sub 2}CO{sub 3} + KHCO{sub 3} were studied by spectrophotometry. It was found that Am(IV) was gradually formed upon irradiation with UV light. Its concentration settled at a value of approximately 60% of the initial Am(III) concentration within 6 h. Specially prepared Am (IV) was partially reduced to Am(III) concentration, pH, and total concentration of HCO{sub 3}{sup -} and CO{sub 3}{sup 2-}. The presence of oxygen had no effect on the rate of the process. Laser radiation of a wavelength of 510.6 nm produced no oxidation of Am(III). It was suggested that the excited complex ion of Am(III) forms an excimer with the unexcited ion Am(III); H{sub 2} elimnation from this excimer yields Am(IV).
- OSTI ID:
- 166700
- Journal Information:
- High Energy Chemistry, Journal Name: High Energy Chemistry Journal Issue: 5 Vol. 29; ISSN 0018-1439; ISSN HIECAP
- Country of Publication:
- United States
- Language:
- English
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