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- W2078631383 endingPage "1287" @default.
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- W2078631383 abstract "Speciation of copper-humic substances (HS) in the electrokinetic remediation (EKR) of a contaminated soil was studied by in situ extended X-ray absorption fine structure (EXAFS) and X-ray absorption near edge structure (XANES) spectroscopies. The least-square fits of the XANES spectra suggested that the main Cu species in the contaminated soil were Cu-HS (50%), CuCO(3) (28%), Cu(2)O (11%), and CuO (11%). The Cu-HS in the contaminated soil possessed equatorial and axial Cu-O bond distances of 1.94 and 2.17 A with coordination numbers (CNs) of 3.6 and 1.4, respectively. In the EKR process, the axial Cu-O bond distance in the Cu-HS complexes was increased by 0.15 A, which might be due to a ligand exchange of the Cu-HS with H(2)O molecules in the electrolyte. After 180 min of EKR, about 50% of the Cu-HS complexes (or 24% of total Cu) in the soil were dissolved and formed [Cu(H(2)O)(6)](2+) in the electrolyte, 71% (or 17% of total Cu in the soil) of which were migrated to the cathode under the electric field (5 V/cm). This work exemplifies the use of in situ EXAFS and XANES spectroscopies for speciation studies of Cu chelated with HS in the contaminated soil during EKR." @default.
- W2078631383 created "2016-06-24" @default.
- W2078631383 creator A5064331027 @default.
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- W2078631383 date "2004-07-01" @default.
- W2078631383 modified "2023-09-27" @default.
- W2078631383 title "In Situ Speciation Studies of Copper–Humic Substances in a Contaminated Soil during Electrokinetic Remediation" @default.
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- W2078631383 doi "https://doi.org/10.2134/jeq2004.1280" @default.
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