Experimental aspects of mechanistic studies on aqueous ozone decomposition in alkaline solution

Attila Nemes, I. Fábián, Gilbert Gordon

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

Ozone decomposition in aqueous solution was studied by the stopped flow method over the pH 10.4 - 13.2 range at 25 ± 0.1 °C and I = 0.5 M NaClO4. At 260 nm the molar absorptivity of aqueous ozone was determined to be 3135 ± 22 M-1cm-1-1. It was shown that various experimental factors may significantly alter the course of the reaction. Even small amounts of H2O2 absorbed by the plastic parts of the stopped-flow instrument can affect the kinetic features of the reaction for an extended period of time. Under strictly controlled experimental conditions sufficiently reproducible data could be obtained for the decomposition. The data were evaluated by comparing experimental and simulated kinetic traces. A detailed kinetic model was developed which is able to predict the decay and life-time of ozone as well as the formation and decomposition of the ozonide ion radical (O3) over the pH 10.4-13.2 range.

Original languageEnglish
Pages (from-to)287-304
Number of pages18
JournalOzone: Science and Engineering
Volume22
Issue number3
Publication statusPublished - Jun 2000

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Ozone
ozone
decomposition
Decomposition
kinetics
Kinetics
Plastic parts
aqueous solution
plastic
Ions
ion

Keywords

  • Kinetic Models
  • Ozone
  • Ozone Decomposition
  • Parameter Fitting
  • Simulation

ASJC Scopus subject areas

  • Environmental Science(all)
  • Environmental Chemistry

Cite this

Experimental aspects of mechanistic studies on aqueous ozone decomposition in alkaline solution. / Nemes, Attila; Fábián, I.; Gordon, Gilbert.

In: Ozone: Science and Engineering, Vol. 22, No. 3, 06.2000, p. 287-304.

Research output: Contribution to journalArticle

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