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Extraction of radium and actinium with dibenzo-21-crown-7 resin and Rose Bengal

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Abstract

The extraction of 224Ra and 228Ac with dibenzo-21-crown-7 resin was studied in solutions with Rose Bengal and identical solutions without Rose Bengal (blanks) from pH 3 to 12. Batch studies demonstrated that actinium is extracted at high pH (> 10) from both solutions but with a significantly higher extraction from the Rose Bengal solutions (maximum extraction ~ 60,000) than the blank solutions (maximum extraction ~ 2,000). In the Rose Bengal solutions, there was a weak extraction of actinium at lower pH (4–10) as well. There was no uptake of radium from the blank solutions, and a weak extraction at all pH levels from the Rose Bengal solutions. Kinetics studies were performed for actinium only, as radium had no significant extraction. Two column studies are demonstrated for the separation of radium from actinium. These separations are moderately effective with ~ 78% of the actinium recovered with no detectable radium.

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Acknowledgements

This study was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344. The authors would like to thank Carlos Valdez for providing the Rose Bengal.

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  1. Lawrence Livermore National Laboratory, Nuclear and Chemical Sciences Division, Livermore, CA, USA

    Kelly N. Kmak & John D. Despotopulos

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  1. Kelly N. Kmak
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  2. John D. Despotopulos
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Correspondence to Kelly N. Kmak.

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Kmak, K.N., Despotopulos, J.D. Extraction of radium and actinium with dibenzo-21-crown-7 resin and Rose Bengal. J Radioanal Nucl Chem 331, 3175–3181 (2022). https://doi.org/10.1007/s10967-022-08368-0

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  • DOI: https://doi.org/10.1007/s10967-022-08368-0

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