Boehmite sorbs perrhenate and pertechnetate
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Pengchu Zhang
Boehmite and Al-oxyhydroxide gels sorb ReO4-, a non-radioactive analogue of TcO4- from NaNO3 solutions. Sorption appears to be substantially electrostatic (though there appears to be a specific preference for ReO4- over NO3-) and is most effective at pH < 8. Measured Kd´s lie between 5 and 105 ml g-1, depending on the solid, pH, and ionic strength. ReO4- and TcO4- are both partially removed from high pH Hanford-type acid waste simulants upon neutralization and formation of Al-rich sludges. We therefore propose that sequestration of Tc by boehmite limits dissolved Tc levels in the near and sub-surface environment and for that purpose boehmite might be relied on as a backfill, or reactive barrier, to limit environmental transport of Tc.
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- 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
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- 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
Artikel in diesem Heft
- 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
