Synergetic Extraction in Systems with Dicarbollide and Bidentate Phosphonate
- 1 January 1994
- journal article
- research article
- Published by Taylor & Francis in Separation Science and Technology
- Vol. 29 (2) , 261-274
- https://doi.org/10.1080/01496399408002482
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.Keywords
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