Competitive actinide interactions in colloidal humic acid-mineral oxide systemsFunded under: JRC-RADWASTE 5C
The adsorption behaviour of americium, thorium, neptunium, and plutonium was investigated in multicomponent systems containing gamma alumina or amorphous silica as model inorganic particles and polydispersed humic acid (HA) colloids isolated from an organic-rich clay formation. The sorption selectivity of the actinide ions on bare mineral oxide particles could be explained on the basis of the hard-soft Lewis acid-base behaviour. Competition experiments using HA indicated that the extent of actinide adsorption depends on the coordinating strengths of HA on the surface and in the solution.
Bibliographic Reference: Article: Environmental Science and Technology, Vol. 25 (1991) No. 11, pp. 1913-1919
Record Number: 199210098 / Last updated on: 1994-12-02
Original language: en
Available languages: en