title: The photosensitized oxidation of mixture of parabens in aqueous solution.
abstract: The work presents results of studies on the photosensitized oxidation of mixture of five parabens (methyl-, ethyl-, propyl-, n-butyl-, and benzylparaben) in aqueous solution. Aluminum phthalocyanine chloride tetrasulfonic acid and xenon lamp simulating solar radiation were used as a photosensitizer and a light source, respectively. The purpose was to investigate the influence of inhibitory effect compounds present in the mixture on the reaction rate. The influence of the addition of second photosensitizer on the parabens degradation rate was investigated. The effect of additives: tert-butanol - hydroxyl radical scavenger and sodium azide - singlet oxygen scavenger on reaction course was also determined. The transformation products formed during the photosensitized oxidation process were analyzed by UPLC-MS/MS. The efficiency of photosensitized oxidation of parabens with natural sunlight irradiation in the central Poland was checked.
authors.affiliation: Faculty of Civil Engineering, Architecture and Environmental Engineering, Lodz University of Technology, Al. Politechniki 6, 90-924, Lodz, Poland. dorota.gryglik@p.lodz.pl.
authors.forename: D
authors.initials: D
authors.lastname: Gryglik
authors.affiliation: Faculty of Process and Environmental Engineering, Lodz University of Technology, ul. Wólczańska 213, 90-924, Lodz, Poland.
authors.forename: M
authors.initials: M
authors.lastname: Gmurek
mesh_terms: D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry*; D010226:Parabens / Q000737:chemistry*; D055668:Photochemical Processes; D014865:Waste Disposal, Fluid; D062065:Wastewater / Q000032:analysis*
chemical_list: D010100:Oxygen; D010226:Parabens; D062065:Wastewater
keywords: Parabens; Photosensitized oxidation; Singlet oxygen; Sunlight; Visible light