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Abstract
A process for the extraction of tervalent metal cations from 3 M HNO3 highly radioactive waste based on synergetic mixtures of dicarbollide with neutral organophosphonate (dibutyl diethylcarbamoylmethylene phosphonate) is proposed. Due to the great hydrophobicity of dicarbollide anion, the species ML3+ n · 3BCl− is extracted and the extraction in this TRUDIC process decreases with aqueous acidity, contrary to TRUEX process. HL +BCl− is the main particle in the organic phase. The extraction of Cs+, Sr2+, Ba2+, and Ru is low, and the extraction of Zr can be suppressed by citric acid. Possible advantages of the system are discussed.
∗ Present address for J. Rais and permanent address for S. Tachimori: Department of Fuel Safety Research, Japan Atomic Energy Research Institute, Tokai-Mura, Naka-Gun, Ibaraki-Ken, 31911, Japan.
Notes
∗ Present address for J. Rais and permanent address for S. Tachimori: Department of Fuel Safety Research, Japan Atomic Energy Research Institute, Tokai-Mura, Naka-Gun, Ibaraki-Ken, 31911, Japan.