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Macroporous LTA-monoliths for in-flow removal of radioactive strontium from aqueous effluents: Application to the case of Fukushima

Abstract : Fukushima disaster has lead to a large amount of contaminated seawater by radionuclides as caesium and strontium. 137Cs is a beta-gamma emitter and 90Sr is a beta-emitter with respective half-lives of 30 and 29 years. Innovative technologies are needed to treat such complex effluent: presence of competing cations (Ca2+, Na+), neutral pH (pH 7-8), together with an easy way of final disposal. We show here that a novel material appearing as a macroporous zeolite A monolith (named LTA-monolith) proves efficient for sorptive removal of Sr2+ ions from salty aqueous solutions in continuous flow process. LTA-monolith shows high efficiency and selectivity for the in-flow treatment of radioactive water as simulated Fukushima seawater containing high amount of Na+ (9.6 g L- 1), Ca2+ (0.4 g L- 1), Mg2+ (1.28 g L- 1), K+ (0.5 g L- 1), and Sr2+ (7.8 mg L- 1), as well as radioactive 90Sr2+ (5.5 ng L- 1, 28 kBq L- 1). LTA-monolith in-flow process discloses a decontamination capacity four times higher in comparison to batch processes. Furthermore LTA-monolith can be directly used as storage radioactive matter without solidification to perform.
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https://hal.archives-ouvertes.fr/hal-00738323
Contributor : Francesco Di Renzo Connect in order to contact the contributor
Submitted on : Thursday, October 4, 2012 - 9:25:37 AM
Last modification on : Tuesday, December 7, 2021 - 2:04:02 PM

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Alexander Sachse, Aurélie Merceille, Yves Barré, Agnès Grandjean, François Fajula, et al.. Macroporous LTA-monoliths for in-flow removal of radioactive strontium from aqueous effluents: Application to the case of Fukushima. Microporous and Mesoporous Materials, Elsevier, 2012, 164, pp.251-258. ⟨10.1016/j.micromeso.2012.07.019⟩. ⟨hal-00738323⟩

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