Influence of silicon species on the transformation of green rust I(Cl-) in aqueous solution by oxidation

Gadadhar Sahoo, Shun Fujieda, Kozo Shinoda, Shinichi Yamaguchi, Masao Korosaki, Shigeru Suzuki

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

X-ray diffraction (XRD) and solution analysis were used for characterizing the influence of different silicon species on oxidation of green rust (GRI(Cl-)) suspension. While addition of silicon to metallic iron enhanced the formation of β-FeOOH, GRI(Cl-) in aqueous solution oxidized into lepidocrocite and oxidation was delayed in presence of silica and silicate species as noticed from potential, pH, and dissolved oxygen (DO) measurements. Transmission electron micrographs showed that the particle size of lepidocrocite was reduced due to silicate addition. The influence of silicate was attributed to its adsorption on GRI(Cl-) and lepidocrocite particles as confirmed from ICP-AES analysis of supernatant solution.

Original languageEnglish
Pages (from-to)4001-4009
Number of pages9
JournalCorrosion Science
Volume53
Issue number12
DOIs
Publication statusPublished - 2011 Dec 1

Keywords

  • A. Iron
  • A. Steel
  • B. ICP-OES
  • B. XRD
  • C. Oxidation
  • C. Rust

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

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