Zinc species distribution in EDTA-extract residues of zinc-contaminated soil

Shuo Hsiu Chang, Yu Ling Wei, Hong-Paul Wang

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Soil sample from a site heavily contaminated with >10 wt.% zinc is sampled and extracted with aqueous solutions of ethylene diamine tetra-acetic acid (EDTA) that is a reagent frequently used to extract heavy metals in soil remediation. Three liquid/soil ratios (5/1, 20/1, and 100/1) were used in the extracting experiment. The molecular environment of the residual Zn in the EDTA-extract residues of zinc-contaminated soil is investigated with XANES technique. The results indicate that EDTA does not show considerable preference of chelating for any particular Zn species during the extraction. Zn species distribution in the sampled soil is found to resemble that in all EDTA-extract residues; Zn(OH)2 is determined as the major zinc species (60-70%), seconded by organic zinc (21-26%) and zinc oxide (9-14%).

Original languageEnglish
Pages (from-to)220-223
Number of pages4
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume156-158
DOIs
Publication statusPublished - 2007 May 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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