A preliminary study of the reduction of Np(VI) by formohydroxamic acid using stopped-flow near-infrared spectrophotometry
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B. Colston
The kinetics of the reduction of NpO22+ to NpO2+ in nitric acid aqueous solution by formohydroxamic acid (FHA) were studied to allow more accurate flow sheet modelling of neptunium separation from uranium and plutonium in an Advanced PUREX process. The rate of the reaction was monitored using stopped-flow spectrophotometry with near-infrared detection. The conditional reduction rate in 2 M nitric acid at 22°C could be described by the following equation:
-d [NpO22+]/dt = k [NpO22+][FHA](M/s)
with k = 1.17×103 M-1 s-1 at [H+] = 2.0 M. Comparison with other data available in the literature, indicates that formohydroxamic acid is an unusually strong reducing agent for NpO22+.
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- Target-dependence of light fragment production in photonuclear reactions at intermediate energies
- A preliminary study of the reduction of Np(VI) by formohydroxamic acid using stopped-flow near-infrared spectrophotometry
- Trivalent lanthanide and actinide extraction by calixarenes with different ring sizes and different molecular flexibility
- Uranium(VI) complexation with citric, humic and fulvic acids
- Synergistic extraction of uranium(VI) from nitric acid solution by a mixture of n-octyldecylsulfoxide (ODSO) and petroleum sulfoxides (PSO) in carbon tetrachloride
- Removal of 234,238U, 226Ra, 210Po and 210Pb from drinking water by ion exchange
- Boehmite sorbs perrhenate and pertechnetate
Articles in the same Issue
- Target-dependence of light fragment production in photonuclear reactions at intermediate energies
- A preliminary study of the reduction of Np(VI) by formohydroxamic acid using stopped-flow near-infrared spectrophotometry
- Trivalent lanthanide and actinide extraction by calixarenes with different ring sizes and different molecular flexibility
- Uranium(VI) complexation with citric, humic and fulvic acids
- Synergistic extraction of uranium(VI) from nitric acid solution by a mixture of n-octyldecylsulfoxide (ODSO) and petroleum sulfoxides (PSO) in carbon tetrachloride
- Removal of 234,238U, 226Ra, 210Po and 210Pb from drinking water by ion exchange
- Boehmite sorbs perrhenate and pertechnetate
