Download or read book Modeling of Aqueous and Organic Phase Speciation for Solvent Extraction Systems written by and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The TRUEX (TRansUranic EXtraction) solvent extraction process has the ability to remove, separate, and recover transuranic (TRU) elements from acidic nuclear waste solutions. A computer model of the TRUEX process is currently being developed for use in flowsheet design and process optimization. The correlations that are to be used in the model for generating extraction distribution ratios are based on chemical mass action principles and require calculation of aqueous and organic phase speciation. Aqueous phase activity coefficients are calculated using methods available in the literature, while the organic phase species are treated in terms of ideal associated solution theory. This approach is demonstrated for the extraction of HNO3, HTcO4, and americium nitrate by n-octyl(phenyl)-N, N-diisobutylcarbamoyl-methylphosphine oxide (CMPO)--the primary metal extractant in the TRUEX solvent. 23 refs., 5 figs.