Journal ArticleDOI
Secondary cleanup of truex process solvent
R. Chiarizia,E. P. Horwitz +1 more
TLDR
In this paper, several secondary cleanup procedures have been tested for hydrolytically and radiolyteically degraded TRUEX process solvent (0.2 m tributylphosphate (TBP) in n-dodecane).Abstract:
Several secondary cleanup procedures have been tested for hydrolytically and radiolytically degraded TRUEX process solvent (0.2 M. n-octyl(phenyl)N,N-diisobutylcarbamoylmethylphosphine oxide (CMPO)-1.2 M tributylphosphate (TBP) in n-dodecane). Sodium carbonate scrub was used as primary cleanup. For the secondary cleanup macroporous anion exchange resins and other solid adsorbents, such as goethite (a-FeOOH), alumina and activated charcoal were used. The effectiveness of a cleanup procedure was established by its capability to restore the original americium(III) distribution ratio from low HNO3 concentration, that is characteristic of pristine process solvent. Further information was obtained from the measurement of up to seven successive AmfJIT) distribution ratios with the regenerated solvent, using the stripping conditions of the TRUEX process. Although all the procedures tested proved to be effective in removing most of the unwanted acidic products from the degraded solvent, the use of a stron...read more
Citations
More filters
Journal ArticleDOI
Actinide partitioning—a review
TL;DR: In this paper, a review of the state-of-the-art reagents and methods for hydrometallurgical partitioning of actinides from different types of transuranium wastes and dissolved fuels is presented.
Journal ArticleDOI
Aqueous Partitioning of Minor Actinides by Different Processes
TL;DR: In this article, the authors proposed a strategy for effective mitigation of the long-term hazards associated with high-level waste (HLW) by actinide partitioning, where substituted malonamide extractants such as DMDBTDMA and DMDOHEMA have emerged as viable green alternatives to phosphine oxides.
Book ChapterDOI
Actinide Separation Science and Technology
TL;DR: In this paper, it was shown that the field of metal ion separations, solvent extraction, and ion exchange in particular, would not be as important as it is today were it not for the discovery and exploitation of the actinides.
Journal ArticleDOI
Review Article: The Effects of Radiation Chemistry on Solvent Extraction 3: A Review of Actinide and Lanthanide Extraction
TL;DR: In this paper, the radiation chemistry of irradiated aqueous nitric acid and the tributyl acid was studied in a mixed organic/aqueous environment, with the formation of only benign degradation products.
Book ChapterDOI
The Truex Process: A Vital Tool for Disposal of U.S. Defense Nuclear Waste
E. P. Horwitz,W. W. Schulz +1 more
TL;DR: The TRUEX (TRansUranium EXtraction) process is a generic actinide extraction/recovery process for the removal of all actinides from acidic nitrate and chloride nuclear waste solutions as mentioned in this paper.
References
More filters
Book
The systematic identification of organic compounds
TL;DR: In this paper, the authors present a survey of the organic chemistry literature, including preliminary examination, physical properties, and elemental analysis, and a classification of organic compounds by solubility.
Journal ArticleDOI
Hydrolytic and Radiolytic Degradation of Oφd(iB)Cmpo: Continuing Studies
TL;DR: In this paper, the effect of degradation of octylphenyl-N, N-diisobutyl carbamoyl-methylphosphine oxide (CMPO) in tetrachloro-ethylene (TCE) and in tributylphosphate-TCE mixtures (TRUEX process solvent) in contact with HNO3 has been investigated.
Book ChapterDOI
The Truex Process: A Vital Tool for Disposal of U.S. Defense Nuclear Waste
E. P. Horwitz,W. W. Schulz +1 more
TL;DR: The TRUEX (TRansUranium EXtraction) process is a generic actinide extraction/recovery process for the removal of all actinides from acidic nitrate and chloride nuclear waste solutions as mentioned in this paper.
Journal ArticleDOI
Degradation of truex-dodecane process solvent
TL;DR: In this paper, a series of experiments were conducted in a biphasic mode involving contact with aqueous nitric acid solutions, and the stability of the principle extractant (CMPO) was observed to be considerably greater than that reported previously for similar studies in chlorinated diluents.