A study of kinetic modelling and reaction pathway of 2,4-dichlorophenol transformation by photo-fenton-like oxidation

Wei Chu, C. Y. Kwan, K. H. Chan, S. K. Kam

Research output: Journal article publicationJournal articleAcademic researchpeer-review

67 Citations (Scopus)

Abstract

The degradation of 2,4-dichlorophenol (2,4-DCP) by the photo-Fenton-like (Fe3+/H2O2/UVC) process under various reaction conditions was investigated. It was interesting to find that the reaction kinetics of 2,4-DCP in Fe3+/H2O2/UVC systems varied depending on the initial [Fe3+] concentration. A pseudo first-order kinetic and a non-conventional kinetic were discovered at low and higher [Fe3+] concentrations, respectively. A model was used to simulate the non-conventional kinetic process, where two character parameters (the initial decay rate and the final decay fraction) were found to be critical in determining the process. The two parameters successfully quantify the photo-Fenton-like oxidation under different concentrations of [Fe3+] and [H2O2] and the corresponding ratios of Fe(III)/H2O2. The reaction intermediates were identified by an LC/MS analysis and a reaction mechanism was proposed.
Original languageEnglish
Pages (from-to)119-126
Number of pages8
JournalJournal of Hazardous Materials
Volume121
Issue number1-3
DOIs
Publication statusPublished - 20 May 2005

Keywords

  • 2,4-Dichlorophenol
  • Fenton
  • Mechanism
  • Oxidation
  • Photo

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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