Reactive transport modeling of multicomponent cation exchange at the laboratory and field scale
Multicomponent ion exchange models have been successful in describing the chromatographic separation of cations in both laboratory and field settings. Their chief advantage lies in their ability to capture the competitive effects of other cations that may be present. By incorporating exchanger activity coefficients calculated on the basis of the Gibbs-Duhem equation applied to the exchanger phase, it is possible to correct for the non-ideality of exchange. The use of multiple exchange sites can also substantially improve the ability of the cation exchange models to describe adsorption and retardation. All of these benefits are associated with relatively little additional computational burden. Even where the cost of the multicomponent cation exchange calculations are considered too high, the models are useful in calculating distribution coefficients for the environmental conditions of interest.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Director, Office of Science (US)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 836243
- Report Number(s):
- LBNL-55986; R&D Project: G4W036; TRN: US0500521
- Resource Relation:
- Conference: Conceptual model development for subsurface reactive transport modeling of inorganic contaminants, radionuclides, and nutrients., Albuquerque, NM (US), 04/20/2004--04/24/2004; Other Information: PBD: 1 Apr 2004
- Country of Publication:
- United States
- Language:
- English
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