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Environmental Chemistry Letters

, Volume 7, Issue 2, pp 127–132 | Cite as

Effect of iron speciation on the photodegradation of Monuron in combined photocatalytic systems with immobilized or suspended TiO2

  • Hana Měšťánková
  • Gilles MailhotEmail author
  • Jaromír Jirkovský
  • Josef Krýsa
  • Michèle Bolte
Original Paper

Abstract

Photodegradation kinetics of Monuron (3-(4-chlorophenyl)-1,1-dimethylurea) in photoreactor with immobilized and suspended TiO2 photocatalyst were studied. The effect of addition of ferric or ferrous perchlorate was investigated. Whatever the concentration of Fe(III/II) added there is no significant negative effect on the photodegradation rate of pollutants. On the contrary, depending on speciation and concentration of iron salts, slight or marked acceleration of the photodegradation kinetics was observed. This positive influence was more pronounced in the case of TiO2 suspensions than for TiO2 layers. Fe(III) was generally more effective than Fe(II).

Keywords

Photocatalysis Titanium dioxide Iron Fe(III)/Fe(II) Monuron Suspension Immobilized photocatalyst Combined system 

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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • Hana Měšťánková
    • 1
    • 2
  • Gilles Mailhot
    • 1
    • 4
    Email author
  • Jaromír Jirkovský
    • 2
  • Josef Krýsa
    • 3
  • Michèle Bolte
    • 1
  1. 1.Laboratoire de Photochimie Moléculaire et MacromoléculaireUniversité Blaise PascalAubière CedexFrance
  2. 2.J. Heyrovský Institute of Physical ChemistryAcademy of Sciences of the Czech RepublicPrague 8Czech Republic
  3. 3.Department of Inorganic TechnologyInstitute of Chemical TechnologyPrague 6Czech Republic
  4. 4.Laboratoire de Photochimie Moléculaire et Macromoléculaire UMR CNRS-UBP 6505Ensemble Universitaire des CézeauxAubière CedexFrance

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