Photocatalytic degradation of p-chlorophenol by hybrid H2O2 and TiO2 in aqueous suspensions under UV irradiation

Anh Thu Nguyen, Ruey Shin Juang*

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

96 Scopus citations

Abstract

In this study, TiO2 particles were used as photocatalysts for the degradation of aqueous p-chlorophenol (p-CP) under UV irradiation. The effect of TiO2 dose (0-3g/L), initial p-CP concentration, H2O2 concentration (2-45mM), solution pH (4.6-9.5), and UV light intensity on the degradation of p-CP were examined. Four oxidative degradation processes, which utilized UV alone (direct photolysis), H2O2/UV, TiO2/UV, and H2O2/TiO2/UV, were compared in a batch photoreactor with a 100-W high-pressure mercury lamp. The photodegradation of p-CP could be described by the pseudo-first-order kinetics according to the Langmuir-Hinshelwood model. Moreover, the apparent degradation rate constants increased considerably from 3.5×10-3min-1 (direct photolysis) to 19.9×10-3min-1 (H2O2/TiO2/UV system).

Original languageEnglish
Pages (from-to)271-277
Number of pages7
JournalJournal of Environmental Management
Volume147
DOIs
StatePublished - 01 01 2015

Bibliographical note

Publisher Copyright:
© 2014 Elsevier Ltd.

Keywords

  • Hydrogen peroxide
  • Langmuir-Hinshelwood model
  • P-Chlorophenol
  • Photocatalytic degradation
  • Titanium dioxide
  • UV light

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