Competitive actinide interactions in colloidal humic acid-mineral oxide systems
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 colloids (HA) isolated from an organic-rich clay formation. The sorption selectivity of the actinide ions on bare mineral oxide particles can be explained on the basis of the hard-soft Lewis acid-base behaviour. 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: 199210746 / Last updated on: 1994-12-02
Original language: en
Available languages: en