Photocatalytic oxidation of dichlorvos in the presence of hydrogen peroxide and ferrous ion

M. C. Lu*, G. D. Roam, J. N. Chen, Chih-Pin Huang

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

22 Scopus citations

Abstract

The photcatalytic oxidation of dichlorvos has been investigated with two different reactors. The reactor using 254 nm light is a system with TiO2 suspensions. The 360 nm light is used as the light source of the fixed system which was TiO2 coated on the inner surface of the reactor. In terms of quantum yield, the 254 nm radiation is more effective for dichlorvos oxidation than the 360 nm light. The effect of H2O2 on dichlorvos oxidation shows a negative performance. The influence of H2O2 on dichlorvos is greater in the fixed system than that in the suspension system. The ferrous ions can induce the photo-Fenton-type reaction. However, the photocatalytic oxidation of dichlorvos will be inhibited slightly at the concentration of 1.0 X 10-5 M Fe+2. This result is explained in terms of the net production of hydroxyl radical.

Original languageEnglish
Pages (from-to)29-38
Number of pages10
JournalWater Science and Technology
Volume30
Issue number9 pt 9
DOIs
StatePublished - 1 Nov 1994
EventProceedings of the 17th Biennial Conference of the International Association on Water Quality. Part 8 - Budapest, Hung
Duration: 24 Jul 199430 Jul 1994

Keywords

  • Dichlorvos
  • Hydrogen peroxide
  • Photo-Fenton reaction
  • Photocatalytic oxidation
  • Titanium dioxide

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