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Titre du document / Document title

Supercritical fluid extraction of radionuclides : A green technology for nuclear waste management

Auteur(s) / Author(s)

WAI Chien M. ;

Résumé / Abstract

Supercritical fluid carbon dioxide is capable of dissolving uranium dioxide directly with a CO2-soluble n-tributylphosphate-nitric acid complex. The extracted uranyl compound UO2(NO3)2(TBP)2 has a solubility of about 0.4 mol/L in supercritical CO2 at 40 °C and 200 atm. Cesium and strontium can also be extracted by supercritical CO2 using a crown ether and a fluorinated counteranion. Using dicyclohexano-18-crown-6 as the ligand and pentadecafluoro-n-octanoic acid as the counteranion, Sr2+ can be selectively extracted over Ca2+ and Mg2+ by supercritical CO2 at 60 °C and 100 atm. Supercritical CO2 which can penetrate into small pores of solid materials and extract radionuclides with minimal liquid waste generation appears to provide an attractive green technology for nuclear waste management.

Revue / Journal Title

ACS symposium series    ISSN  0097-6156   CODEN ACSMC8 

Source / Source

2006, vol. 943, pp. 161-170 [10 page(s) (article)]

Langue / Language


Editeur / Publisher

Oxford University Press, Cary, NC, ETATS-UNIS  (1974) (Revue)

Localisation / Location

INIST-CNRS, Cote INIST : 17351, 35400014563028.0090

Nº notice refdoc (ud4) : 18623768

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