title: Oxidation of atrazine in aqueous media by solar- enhanced Fenton-like process involving persulfate and ferrous ion.
abstract: The oxidation of s-triazines (using atrazine (ATZ) as a model compound) by a solar-enhanced Fenton-like process involving persulfate and ferrous ion was studied. A flow-through tubular photoreactor was employed for the experiments. The solar-enhanced oxidative system involving ferrous ion and persulfate (Solar/S2O82-/Fe2+) showed the highest ATZ degradation efficiency when compared with other treatments (unactivated S2O82-, Solar - sunlight only, S2O82-/Fe2+, Solar/S2O82-). Complete degradation of ATZ and 20% reduction in total organic carbon (TOC) content were observed after 30min of the treatment. The in situ generated•ОН and SO4-•radicals were shown to be involved in ATZ oxidation using the radical scavengers methanol and tert-butyl alcohol. Furthermore, iron compounds were shown to act not only as catalysts but also as photo-sensitizers, as the introduction of ferrous ion into the reaction mixture led to an increased absorbance of the solution and expansion of the absorption spectrum into the longer wavelength spectral region.
authors.affiliation: Baikal Institute of Nature Management of Siberian Branch of the Russian Academy of Sciences, 6, Sakhyanova str., Ulan-Ude 670047, Russia.
authors.forename: Marina
authors.initials: M
authors.lastname: Khandarkhaeva
authors.affiliation: Baikal Institute of Nature Management of Siberian Branch of the Russian Academy of Sciences, 6, Sakhyanova str., Ulan-Ude 670047, Russia. Electronic address: abat@binm.bscnet.ru.
authors.forename: Agniya
authors.initials: A
authors.lastname: Batoeva
authors.affiliation: Baikal Institute of Nature Management of Siberian Branch of the Russian Academy of Sciences, 6, Sakhyanova str., Ulan-Ude 670047, Russia.
authors.forename: Denis
authors.initials: D
authors.lastname: Aseev
authors.affiliation: Baikal Institute of Nature Management of Siberian Branch of the Russian Academy of Sciences, 6, Sakhyanova str., Ulan-Ude 670047, Russia.
authors.forename: Marina
authors.initials: M
authors.lastname: Sizykh
authors.affiliation: Baikal Institute of Nature Management of Siberian Branch of the Russian Academy of Sciences, 6, Sakhyanova str., Ulan-Ude 670047, Russia.
authors.forename: Oyuna
authors.initials: O
authors.lastname: Tsydenova
mesh_terms: D001280:Atrazine / Q000032:analysis* / Q000737:chemistry / Q000528:radiation effects; D005296:Ferrous Compounds / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D008962:Models, Theoretical; D010084:Oxidation-Reduction; D013431:Sulfates / Q000737:chemistry*; D013472:Sunlight; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry / Q000528:radiation effects
chemical_list: C045076:Fenton's reagent; D005296:Ferrous Compounds; D013431:Sulfates; D014874:Water Pollutants, Chemical; D006861:Hydrogen Peroxide; D007501:Iron; D001280:Atrazine
keywords: Advanced Oxidation Processes; Atrazine; Fenton-like; Ferrous ion; Persulfate; Solar irradiation