- By:
- Delmau, Laetitia H; Baes Jr, Charles F; Bostick, Debra A; Haverlock, Tamara; Moyer, Bruce A
- Page Number:
- 969-981
- Volume:
- 1
- Book Title:
- Hydrometallurgy 2003—Fifth International Conference in Honor of Professor Ian Ritchie, Vol. 1, Proceedings of the 2003 International Symposium on Hydrometallurgy
- Publication Date:
- June 13, 2024
- Publisher Location:
- The Minerals, Metals, and Materials Society, Warrendale, Pennsylvania, United States of America
- Conference Name:
- 2003 International Symposium on Hydrometallurgy
- Conference Location:
- Vancouver, Canada
- Conference Sponsor:
- The Minerals, Metals, and Materials Society
Abstract
SXFIT is the latest in a series of programs developed in our group to model solvent extraction systems of increasing complexity. SXFIT permits the user complete freedom to define the constituents from which the composition of each phase is to be specified in the data and from which all species of a model for a system are assumed to be formed. Activity coefficients in the nonaqueous and aqueous phases, water activity, apparent molar volumes of aqueous species, and solution density needed for the conversion of concentration from the molarity to the molality scale are all taken into account by the program. Several extraction systems relevant to nuclear-waste treatment were modeled successfully using this program. As an example, the cesium extraction efficiency of the CSSX process chosen by the USDOE for cesium removal from high-level waste stored at the Savannah River Site can be predicted correctly for varying feed composition.
