Radiation chemistry of neptunium ions in aqueous carbonate and bicarbonatesolutions

Authors
Pikaev, AK Gogolev, AV Shilov, VP
Citation
Ak. Pikaev et al., Radiation chemistry of neptunium ions in aqueous carbonate and bicarbonatesolutions, HIGH ENERG, 35(4), 2001, pp. 213-218
Citations number
13
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
HIGH ENERGY CHEMISTRY
ISSN journal
00181439 → ACNP
Volume
35
Issue
4
Year of publication
2001
Pages
213 - 218
Database
ISI
SICI code
0018-1439(200107/08)35:4<213:RCONII>2.0.ZU;2-I
Abstract
The radiolytic reactions of neptunium ions in aqueous carbonate, alkaline c arbonate, and bicarbonate solutions were examined. It was found that Np(VI) is not oxidized to Np(VII) in carbonate and bicarbonate solutions saturate d with nitrous oxide, whereas this oxidation process takes place in alkalin e carbonate solutions, in which Np(VI) occurs as a hydroxo complex. It was also found that Np(V) is a radiation-stable neptunium species in carbonate solutions, whereas Np(VI) is stable in bicarbonate solutions.