摘要
Speciation of copper in the electrokinetic treatments of an industrial sludge was studied by in situ extended X-ray absorption fine structural (EXAFS) and X-ray absorption near-edge structural (XANES) spectroscopies in the present work. The least-square fits (LSF) of the XANES spectra indicated that the main copper species in the sludge were Cu(NO)3 (82%) and adsorbed copper (Cu/SiO2) (17%). Copper in the sludge possessed a Cu-O bond distance of 1.97Å with a coordination number (CN) of 3.8. In the second shells, the bond distance of Cu-(O)-Si was 3.03Å with a CN of 1.5. Most of Cu/SiO2 was dissolved in the aqueous phase since little Cu-(O)-Si species in the sludge was found after 180min of the electrokinetic treatments. About 69% of total Cu(II) was dissolved into the aqueous phase and 51% of which was migrated to the cathode under the electric field (5Vcm-1) for 180min.
原文 | English |
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頁(從 - 到) | 2387-2391 |
頁數 | 5 |
期刊 | Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy |
卷 | 60 |
發行號 | 10 |
DOIs | |
出版狀態 | Published - 2004 8月 1 |
All Science Journal Classification (ASJC) codes
- 分析化學
- 原子與分子物理與光學
- 儀器
- 光譜