Speciation of copper in a contaminated soil during H3PO 4-assisted EKR

Shou-Heng Liu, Hong-Paul Wang, M. Y. Yu, Y. J. Huang, H. C. Wang

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5 Citations (Scopus)

Abstract

Speciation of copper in a contaminated soil during electrokinetic remediation (EKR) assisted by H3PO4 was studied by in situ X-ray absorption near edge structural (XANES) spectroscopy. The least-square fit of the XANES spectrum showed that CuCO3 (68%) and CuCl 2 (32%) were the major copper species in the contaminated soil. In the presence of H3PO4 (40%), most of CuCl2 and about 24% of CuCO3 were dissolved into the aqueous phase. After 90 min of EKR, at least 30% of Cu(II) ions were transported towards the cathode by electric field. A similar dissolution behavior of copper from the soil with 40% H3PO4 and 2% H2O2 was also observed. Nevertheless, migration of Cu(II) ions to the cathode was highly enhanced in the presence of H3PO4 and H2O2 by EKR for the first 90 min.

Original languageEnglish
Pages (from-to)311-314
Number of pages4
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume144-147
DOIs
Publication statusPublished - 2005 Jun 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry

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