Extraction equilibria between organic CMPO-n-dodecane and aqueous nitric acid phases for selected tank waste components
- Oak Ridge National Lab., TN (United States)
- Univ. of Tennessee, Knoxville, TN (United States)
Removal of the transuranium elements from tank-stored wastes is an important step in the cost effective treatment and preparation of these wastes for permanent disposal. One promising method of treatment involves dissolving the tank sludges in acid, followed by extraction of the transuranium species. The TRUEX process, which uses an extracting medium composed of octyl(phenyl)-N,N-diisobutylcarbamoylmethyl phosphine oxide (CMPO) and tri-n-butyl phosphate (TBP) dissolved in an organic solvent such as n-dodecane, is being tested for this purpose. Although CMPO is a powerful extractant for all the actinides, concern arises that certain process chemicals present in the waste will compete for the CMPO. Data will be presented on the pure component equilibrium characteristics of nitric acid, uranyl nitrate and bismuth nitrate partitioned between a nitric acid aqueous phase and a CMPO-n-dodecane organic phase.
- OSTI ID:
- 370562
- Report Number(s):
- CONF-960376--
- Country of Publication:
- United States
- Language:
- English
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