Pathway of aqueous ferric hydroxide catalyzed ozone decomposition and ozonation of trace nitrobenzene

Jun Ma*, Tao Zhang, Zhong Lin Chen, Ming Hao Sui, Xue Yan Li

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

In this paper, the decomposition rate of ozone in water was measured over GAC and ferric hydroxide/GAC (FeOOH/GAC) catalyst and the mechanism of ozone catalytic decomposition was discussed. The catalytic ozonation activity of trace nitrobenzene in water was determined on several metal oxides and correlated with their surface density of hydroxyl groups and pHzpc(pH of zero point of charge). The results show that: (1) The pseudo-first order rate of ozone decomposition increased by 68 and 108 percent for GAC and FeOOH/GAC catalysts respectively; (2) When t-butanol was added, the rate constant decreased by 9% for GAC and 20% for FeOOH/GAC; (3) There was no direct correlation between surface density of hydroxyl groups and the activity of catalytic ozonation of nitrobenzene; (4) The oxide surface at nearly zero charged point was favorable for the catalytic ozonation of nitrobenzene.

Original languageEnglish (US)
Pages (from-to)78-82
Number of pages5
JournalHuanjing Kexue/Environmental Science
Volume26
Issue number2
StatePublished - Mar 2005
Externally publishedYes

Keywords

  • Catalytic ozonation
  • FeOOH
  • Hydroxyl radicals
  • Nitrobenzene
  • pH
  • Surface hydroxyl groups

ASJC Scopus subject areas

  • Environmental Engineering

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