Reduction of nitrobenzene and formation of corrosion coatings in zerovalent iron systems

Yong H. Huang, Tian C. Zhang

Research output: Contribution to journalArticlepeer-review

95 Scopus citations


Batch tests were conducted to investigate reduction of nitrobenzene in a zerovalent iron system (Fe0) under various conditions. The results indicated that a limited amount of nitrobenzene (ArNO2) could be reduced to aniline by Fe0, but formation of a lepidocrocite (γ-FeOOH) coating could significantly slow down the reaction. However, augmenting Fe0 with substoichiometric FeCl2 could dramatically accelerate the reaction. Surface-adsorbed Fe(II), not pH nor Cl-, was found to be responsible for rejuvenating the system. O2 and nitrobenzene could be concomitantly reduced by Fe0 in the presence of Fe2+. In the Fe0 system, both nitrobenzene and O2 favored formation of lepidocrocite; in the presence of aq. Fe(II), a stratified corrosion coating could develop, with magnetite (Fe3O4) as the inner layer and lepidocrocite as the outer layer. Fe2+ was not the main reductant for the reactions, but might accelerate the autoreduction of lepidocrocite to magnetite by the underlying Fe0. Our understanding on the role of Fe(II) in conjunction with a stratified, evolving corrosion coating may be useful for establishing an iron aquatic corrosion model.

Original languageEnglish (US)
Pages (from-to)3075-3082
Number of pages8
JournalWater Research
Issue number16
StatePublished - Sep 2006


  • Ferrous iron
  • Iron corrosion
  • Iron oxides
  • Nitrobenzene
  • Zerovalent iron

ASJC Scopus subject areas

  • Water Science and Technology
  • Ecological Modeling
  • Pollution
  • Waste Management and Disposal
  • Environmental Engineering
  • Civil and Structural Engineering


Dive into the research topics of 'Reduction of nitrobenzene and formation of corrosion coatings in zerovalent iron systems'. Together they form a unique fingerprint.

Cite this