Fe(III)-solar light induced degradation of diethyl phthalate (DEP) in aqueous solutions.
The degradation of diethyl phthalate (DEP) photoinduced by Fe(III) in aqueous solutions has been investigated under solar irradiation in the compound parabolic collector reactor at Plataforma Solar de Almeria. Hydroxyl radicals *OH, responsible of the degradation, are formed via an intramolecular photoredox process in the excited state of Fe(III) aquacomplexes. The primary step of the reaction is mainly due to the attack of *OH radicals on the aromatic ring. For prolonged irradiations DEP and its photoproducts are completely mineralized due to the regeneration of the absorbing species and the continuous formation of *OH radicals that confers a catalytic aspect to the process. Consequently, the degradation photoinduced by Fe(III) could be an efficient method of DEP removal from water.
Mailhot
G
G
Laboratoire de Photochimie Moléculaire et Macromoléculaire, Université Blaise Pascal, UMR CNRS 6505, France. gilles.mailhot@univ-bpclermont.fr
Sarakha
M
M
Lavedrine
B
B
Cáceres
J
J
Malato
S
S
D002851:Chromatography, High Pressure Liquid; D005290:Ferric Compounds / Q000737:chemistry*; D017665:Hydroxyl Radical / Q000737:chemistry; D007700:Kinetics; D007834:Lasers; D008903:Minerals / Q000737:chemistry; D010782:Photolysis; D010795:Phthalic Acids / Q000737:chemistry* / Q000528:radiation effects; D012996:Solutions; D013056:Spectrophotometry, Ultraviolet; D013472:Sunlight; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000528:radiation effects*; D018508:Water Purification / Q000379:methods*
D005290:Ferric Compounds; D008903:Minerals; D010795:Phthalic Acids; D012996:Solutions; D014874:Water Pollutants, Chemical; D014867:Water; D017665:Hydroxyl Radical; C007379:diethyl phthalate