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Partitioning of High-Level Waste with an Extractant Based on Chlorinated Cobalt Dicarbollide and Dibutylphosphoric Acid Zirconium Salt

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Abstract

A new extractant allowing full partitioning of high-level waste was developed. It consists of chlorinated cobalt dicarbollide, dibutylphosphoric acid zirconium salt, and polyethylene glycol, dissolved in a polar diluent, mononitrobenzotrifluoride. This extractant recovers from the Purex process raffinate REE, TPE, Cs, Sr, Mo, and Zr. The component ratio ensuring maximal recovery of REE and TPE was found. The majority of the above-mentioned elements are extracted by the cation-exchange mechanism, with the recovery increasing as the aqueous phase acidity is decreased. The composition of the extractable species and the stoichiometry of extraction exchange reactions with REE and TPE were studied.

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Authors and Affiliations

  1. Khlopin Radium Institute, Research and Production Association, St. Petersburg, Russia

    D. N. Shishkin, B. Ya. Galkin, Yu. S. Fedorov, B. Ya. Zilberman & O. V. Shmidt

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  1. D. N. Shishkin
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  2. B. Ya. Galkin
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  3. Yu. S. Fedorov
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  4. B. Ya. Zilberman
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  5. O. V. Shmidt
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Shishkin, D.N., Galkin, B.Y., Fedorov, Y.S. et al. Partitioning of High-Level Waste with an Extractant Based on Chlorinated Cobalt Dicarbollide and Dibutylphosphoric Acid Zirconium Salt. Radiochemistry 45, 577–580 (2003). https://doi.org/10.1023/B:RACH.0000015755.53574.35

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  • DOI: https://doi.org/10.1023/B:RACH.0000015755.53574.35

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