In situ speciation studies of copper in the electroplating sludge under an electric field

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Abstract

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.

Original languageEnglish
Pages (from-to)2387-2391
Number of pages5
JournalSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Volume60
Issue number10
DOIs
Publication statusPublished - 2004 Aug 1

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sludge
electroplating
Electroplating
Copper
X ray absorption
Electric fields
copper
electric fields
electrokinetics
coordination number
x rays
Cathodes
cathodes
Spectroscopy
spectroscopy

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Spectroscopy

Cite this

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title = "In situ speciation studies of copper in the electroplating sludge under an electric field",
abstract = "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 1.97{\AA} with a coordination number (CN) of 3.8. In the second shells, the bond distance of Cu-(O)-Si was 3.03{\AA} 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.",
author = "Shou-Heng Liu and Hong-Paul Wang",
year = "2004",
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TY - JOUR

T1 - In situ speciation studies of copper in the electroplating sludge under an electric field

AU - Liu, Shou-Heng

AU - Wang, Hong-Paul

PY - 2004/8/1

Y1 - 2004/8/1

N2 - 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.

AB - 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.

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JO - Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy

JF - Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy

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