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

S. Loyland; M. Yeh; C. Phelps; S. Clark

doi:10.1023/a:1010625402780

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Journal of Radioanalytical and Nuclear Chemistry

Volume/Issue:: Volume 248: Issue 2

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

Authors:

S. Loyland

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

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M. Yeh

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

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C. Phelps

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

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S. Clark

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

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Pages:: 493–499

Online Publication Date:: 29 Oct 2004

Publication Date:: 17 May 2001

Article Category:: Research Article

DOI:: https://doi.org/10.1023/a:1010625402780

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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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Journal of Radioanalytical and Nuclear Chemistry

Print ISSN:: 0236-5731

Online ISSN:: 1588-2780

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Journal of Radionalytical and Nuclear Chemistry
Language	English
Size	A4
Year of Foundation	1968
Volumes per Year	1
Issues per Year	12
Founder	Akadémiai Kiadó
Founder's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher	Akadémiai Kiadó Springer Nature Switzerland AG
Publisher's Address	H-1117 Budapest, Hungary 1516 Budapest, PO Box 245. CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible Publisher	Chief Executive Officer, Akadémiai Kiadó
ISSN	0236-5731 (Print)
ISSN	1588-2780 (Online)