In-situ EXAFS study of copper in the electrokinetic remediation process
The speciation of copper in the early stage of the electrokinetic remediation (EKR) process has been studied by extended X-ray absorption fine structure (EXAFS) spectroscopy in the present work. By in-situ EXAFS, we found that copper in a contaminated soil possessed a Cu-O bond distance of 1.98 A wi...
Veröffentlicht in: | Journal of synchrotron radiation. - 1999. - 8(2001), Pt 2 vom: 01. März, Seite 919-21 |
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Weitere Verfasser: | , , |
Format: | Aufsatz |
Sprache: | English |
Veröffentlicht: |
2001
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Zugriff auf das übergeordnete Werk: | Journal of synchrotron radiation |
Schlagworte: | Journal Article Soil Pollutants Copper 789U1901C5 |
Zusammenfassung: | The speciation of copper in the early stage of the electrokinetic remediation (EKR) process has been studied by extended X-ray absorption fine structure (EXAFS) spectroscopy in the present work. By in-situ EXAFS, we found that copper in a contaminated soil possessed a Cu-O bond distance of 1.98 A with a coordination number (CN) of 5.8. In the second shell, the bond distance of Cu-(O)-Cu was 2.87 A with a CN of 6.4. However, possibly due to the fact that incompact copper atoms in the outer shells were distorted by EKR, the Cu-(O)-Cu (2nd shell) bond distance and the CN of copper in the contaminated soil decreased by 0.08 A and 5.4, respectively in the early stage of the EKR process. Interestingly, after prolonging the contact time to about 80 minutes, the 1st-shell copper atoms were also perturbed by EKR. This work is an example of usefulness of the in-situ EXAFS spectroscopy for detailed studies of the speciation of copper in the contaminated soil during EKR process |
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Beschreibung: | Date Completed 06.09.2001 Date Revised 05.06.2019 published: Print Citation Status MEDLINE |
ISSN: | 0909-0495 |