Approaches to modelling uranium (VI) adsorption on natural mineral assemblages
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Abstract
Component additivity (CA) and generalised composite (GC) approaches to deriving a suitable surface complexation model for description of U(VI) adsorption to natural mineral assemblages are pursued in this paper with good success. A single, ferrihydrite-like component is found to reasonably describe uranyl uptake to a number of kaolinitic iron-rich natural substrates at pH > 4 in the CA approach with previously published information on nature of surface complexes, acid-base properties of surface sites and electrostatic effects used in the model. The GC approach, in which little pre-knowledge about generic surface sites is assumed, gives even better fits and would appear to be a method of particular strength for application in areas such as performance assessment provided the model is developed in a careful, stepwise manner with simplicity and goodness of fit as the major criteria for acceptance.
Suggested Citation
Waite, T., Davis, J., Fenton, B., and Payne, T., 2000, Approaches to modelling uranium (VI) adsorption on natural mineral assemblages: Radiochimica Acta, v. 88, p. 687-696, https://doi.org/10.1524/ract.2000.88.9-11.687.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Approaches to modelling uranium (VI) adsorption on natural mineral assemblages |
| Series title | Radiochimica Acta |
| DOI | 10.1524/ract.2000.88.9-11.687 |
| Volume | 88 |
| Publication Date | September 25, 2009 |
| Year Published | 2000 |
| Language | English |
| Publisher | International Atomic Energy Agency |
| Contributing office(s) | Toxic Substances Hydrology Program |
| Description | 10 p. |
| First page | 687 |
| Last page | 696 |