title: Comparison of various advanced oxidation processes for the degradation of phenylurea herbicides.
abstract: Various types of advanced oxidation processes (AOPs), such as UV photolysis, ozonation, heterogeneous photocatalysis and their combinations were comparatively examined at the same energy input in a home-made reactor. The oxidative transformations of the phenylurea herbicides fenuron, monuron and diuron were investigated. The initial rates of transformation demonstrated that UV photolysis was highly efficient in the cases of diuron and monuron. Ozonation proved to be much more effective in the transformation of fenuron than in those of the chlorine containing monuron and diuron. In heterogeneous photocatalysis, the rate of decomposition decreased with increase of the number of chlorine atoms in the target molecule. Addition of ozone to UV-irradiated solutions and/or TiO2-containing suspensions markedly increased the initial rates of degradation. Dehalogenation of monuron and diuron showed that each of these procedures is suitable for the simultaneous removal of chlorinated pesticides and their chlorinated intermediates. Heterogeneous photocatalysis was found to be effective in the mineralization.
authors.affiliation: a Research Group of Environmental Chemistry, University of Szeged , Szeged , Hungary.|b Institute of Isotopes, Centre for Energy Research, Hungarian Academy of Sciences , Budapest , Hungary.
authors.forename: Krisztina
authors.initials: K
authors.lastname: Kovács
authors.affiliation: a Research Group of Environmental Chemistry, University of Szeged , Szeged , Hungary.
authors.forename: János
authors.initials: J
authors.lastname: Farkas
authors.affiliation: a Research Group of Environmental Chemistry, University of Szeged , Szeged , Hungary.
authors.forename: Gábor
authors.initials: G
authors.lastname: Veréb
authors.affiliation: a Research Group of Environmental Chemistry, University of Szeged , Szeged , Hungary.
authors.forename: Eszter
authors.initials: E
authors.lastname: Arany
authors.affiliation: a Research Group of Environmental Chemistry, University of Szeged , Szeged , Hungary.
authors.forename: Gergő
authors.initials: G
authors.lastname: Simon
authors.affiliation: a Research Group of Environmental Chemistry, University of Szeged , Szeged , Hungary.|c Department of Inorganic and Analytical Chemistry , University of Szeged , Szeged , Hungary.
authors.forename: Krisztina
authors.initials: K
authors.lastname: Schrantz
authors.affiliation: a Research Group of Environmental Chemistry, University of Szeged , Szeged , Hungary.
authors.forename: András
authors.initials: A
authors.lastname: Dombi
authors.affiliation: a Research Group of Environmental Chemistry, University of Szeged , Szeged , Hungary.|d Department of Applied and Environmental Chemistry , University of Szeged , Szeged , Hungary.
authors.forename: Klára
authors.initials: K
authors.lastname: Hernádi
authors.affiliation: a Research Group of Environmental Chemistry, University of Szeged , Szeged , Hungary.|c Department of Inorganic and Analytical Chemistry , University of Szeged , Szeged , Hungary.
authors.forename: Tünde
authors.initials: T
authors.lastname: Alapi
mesh_terms: D004237:Diuron / Q000737:chemistry; D006540:Herbicides / Q000737:chemistry*; D008782:Methylurea Compounds / Q000737:chemistry; D010084:Oxidation-Reduction; D010126:Ozone / Q000737:chemistry; D010671:Phenylurea Compounds / Q000737:chemistry; D010782:Photolysis; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods
chemical_list: D006540:Herbicides; D008782:Methylurea Compounds; D010671:Phenylurea Compounds; D014874:Water Pollutants, Chemical; D010126:Ozone; D004237:Diuron; C100088:monuron; C010727:fenuron
keywords: Diuron; fenuron; heterogeneous photocatalysis; monuron; ozone; photolysis