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Effects of supercritical fluid extractions on metal ion partitioning as indicated by sequential extractions

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Abstract

We have studied the partitioning of stable elements and uranium to two sediments using sequential extractions (SE). These matrices were then subjected to supercritical fluid extraction (SFE) to attempt to remove the uranium. SEs were repeated on the material remaining after SFE to determine any changes in partitioning. We have confirmed that under suitable chemical conditions, ligand-assisted SFE can be used to extract many metal ions from such matrices. Under the conditions we used, the "easily leachable" metals were extracted, but the refractory metals were not. In addition, SFE appears to redistibute the remaining metal cations among the remaining geochemical after SFE treatment. Our results are presented and discussed in the context of developing decontamination strategies for contaminated soils and sediments.

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Author notes

  1. S. M. Loyland

    Present address: Environmental Measurements Laboratory, USA

  2. M. Yeh

    Present address: Chemistry Division, Brookhaven National Laboratory, USA

  3. C. Phelps

    Present address: California State University at Chico, USA

Authors and Affiliations

  1. Department of Chemistry and Nuclear Radiation Center, Washington State University, P.O. Box 644630, Pullman, WA, 99164-4630, USA

    S. M. Loyland, M. Yeh, C. Phelps & S. B. Clark

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  1. S. M. Loyland
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  2. M. Yeh
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  3. C. Phelps
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  4. S. B. Clark
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Loyland, S.M., Yeh, M., Phelps, C. et al. Effects of supercritical fluid extractions on metal ion partitioning as indicated by sequential extractions. Journal of Radioanalytical and Nuclear Chemistry 248, 493–499 (2001). https://doi.org/10.1023/A:1010625402780

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  • DOI: https://doi.org/10.1023/A:1010625402780

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