An unconventional approach to studying the reaction kinetics of the Fenton's oxidation of 2,4-dichlorophenoxyacetic acid

Wei Chu, C. Y. Kwan, K. H. Chan, Calvin Chong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

33 Citations (Scopus)

Abstract

The Fenton's oxidation kinetics of herbicide 2,4-D at various [Fe(II)] and [H2O2] combinations was investigated and modelled through an unconventional approach. The reaction kinetics of 2,4-D degradation demonstrated a two-stage pattern of decay, where a very fast reactive stage was followed by a retardation stage due to the depletion of oxidants and to the competitive side-reactions of the intermediates (including 2,4-dichlorophenol, chlorohydroquinone and 2,6-dichlororesorcinol). A model characterized by two newly established constants, the initial decay rate and the maximum oxidative capacity, was proposed and proven capable of describing the two-stage process, which cannot easily be described by conventional first- or second-order kinetics approaches.
Original languageEnglish
Pages (from-to)1165-1171
Number of pages7
JournalChemosphere
Volume57
Issue number9
DOIs
Publication statusPublished - 1 Dec 2004

Keywords

  • 2,4-D
  • Fenton's oxidation
  • Herbicide
  • Hydrogen peroxide
  • Model

ASJC Scopus subject areas

  • Environmental Chemistry
  • Chemistry(all)

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