Ultraviolet-Photoassisted Advanced Oxidation of Parabens Catalyzed by Hydrogen Peroxide and Titanium Dioxide. Improving the System

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• 作者：Eduardo M. Cuerda-Correa ; Joaquı́n R. Domı́nguez-Vargas ; María J. Muñoz-Peña ; Teresa González
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2016
• 出版时间：May 11, 2016
• 年：2016
• 卷：55
• 期：18
• 页码：5152-5160
• 全文大小：527K
• 年卷期：0
• ISSN：1520-5045

文摘

Parabens are widely used as preservatives in personal care products, food, and pharmaceuticals. This paper presents the results of the photochemical degradation of four hazardous water contaminants (methylparaben, ethylparaben, propylparaben, and butylparaben) using an ultraviolet (UV) radiation source in the presence of hydrogen peroxide and/or titanium dioxide. Oxidation kinetics and overall performance of the removal process for the four parabens in Milli-Q water using different advanced oxidation processes (namely, UV/H₂O₂, UV/TiO₂, and UV/TiO₂/H₂O₂) were studied. The most efficient oxidation system to remove these pollutants was UV/TiO₂/H₂O₂. A factorial central composite orthogonal and rotatable design of experiments was used to improve the parabens removal using the UV/TiO₂/H₂O₂ process. Initial concentrations of H₂O₂ and TiO₂ were the selected operational variables to optimize the process in Milli-Q water. Similarly, experiments were carried out under optimal conditions in different surface water matrices, namely, Guadiana River water (Badajoz, SW Spain), Peña del Águila reservoir water (Villar del Rey), and wastewater treatment plant effluent (Badajoz).