Abstract
Polymeric coated ferromagnetic particles with an absorbed layer of octyl(phenyl)-N,N-diisobutylcarbamoylmethylphosphine oxide (CMPO) diluted by tributyl phosphate (TBP) are being evaluated for application in the separation and the recovery of low concentrations of americium and plutonium from nuclear waste solutions. Due to their chemical nature, these extractants selectively complex americium and plutonium contaminants onto the particles, which can be recovered from the solution using a magnet. Physical and chemical characterization of the extractant-absorbed particles were performed by gamma and liquid scintillation counting, transmission electron microscopic (TEM) micrograph, and energy disperse spectroscopy (EDS). Plutonium and americium separations have been performed at various HNO3 concentrations. Parameters such as absorbed layer thickness and separation abilities were studied to determine the limitation and capacity of the process.
The status of the chemistry and application of the process to DOE remediation efforts for actinide decontamination will be discussed.
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Nuñez, L., Vandegrift, G.F. (1995). Plutonium and Americium Separation Using Organophosphorus Extractant Absorbed onto Ferromagnetic Particles. In: Nash, K.L., Choppin, G.R. (eds) Separations of f Elements. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-1406-4_17
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DOI: https://doi.org/10.1007/978-1-4899-1406-4_17
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