Mineralisation of Monuron photoinduced by Fe(III) in aqueous solution.
The degradation of Monuron (3-(4-chlorophenyl)-1,1-dimethylurea) photoinduced by Fe(III) in aqueous solution has been investigated. The rate of degradation depends on the concentration of Fe(OH)2+, the most photoreactive species in terms of *OH radical formation. These *OH radicals are able to degrade Monuron until total mineralisation. The primordial role of the speciation of Fe(III)-hydroxy complex in aqueous solution, for the efficiency of the elimination of pollutant, was shown and explained in detail. The formation of Fe(II) in the irradiated solution was monitored and correlated with the total organic carbon evolution. Degradation photoproducts were identified and a mechanism of degradation is proposed.
Mest'ánková
Hana
H
Laboratoire de Photochimie Moléculaire et Macromoléculaire, Université Blaise Pascal, F-63177 Aubière Cedex, France.
Mailhot
Gilles
G
Pilichowski
Jean-François
JF
Krýsa
Josef
J
Jirkovský
Jaromir
J
Bolte
Michèle
M
D002851:Chromatography, High Pressure Liquid; D005290:Ferric Compounds / Q000737:chemistry* / Q000528:radiation effects; D006540:Herbicides / Q000737:chemistry* / Q000528:radiation effects; D006878:Hydroxides / Q000737:chemistry; D008027:Light; D008782:Methylurea Compounds / Q000737:chemistry* / Q000528:radiation effects; D010782:Photolysis; D013997:Time Factors; D014867:Water / Q000737:chemistry; D018508:Water Purification
D005290:Ferric Compounds; D006540:Herbicides; D006878:Hydroxides; D008782:Methylurea Compounds; D014867:Water; C031356:hydroxide ion; C100088:monuron