title: Parabens abatement from surface waters by electrochemical advanced oxidation with boron doped diamond anodes.
abstract: The removal efficiency of four commonly-used parabens by electrochemical advanced oxidation with boron-doped diamond anodes in two different aqueous matrices, namely ultrapure water and surface water from the Guadiana River, has been analyzed. Response surface methodology and a factorial, composite, central, orthogonal, and rotatable (FCCOR) statistical design of experiments have been used to optimize the process. The experimental results clearly show that the initial concentration of pollutants is the factor that influences the removal efficiency in a more remarkable manner in both aqueous matrices. As a rule, as the initial concentration of parabens increases, the removal efficiency decreases. The current density also affects the removal efficiency in a statistically significant manner in both aqueous matrices. In the water river aqueous matrix, a noticeable synergistic effect on the removal efficiency has been observed, probably due to the presence of chloride ions that increase the conductivity of the solution and contribute to the generation of strong secondary oxidant species such as chlorine or HClO/ClO-. The use of a statistical design of experiments made it possible to determine the optimal conditions necessary to achieve total removal of the four parabens in ultrapure and river water aqueous matrices.
authors.affiliation: Department of Organic and Inorganic Chemistry. Faculty of Sciences, University of Extremadura, Avda de Elvas S/N., E-06006, Badajoz, Spain.
authors.forename: Joaquín R
authors.initials: JR
authors.lastname: Domínguez
authors.affiliation: Department of Organic and Inorganic Chemistry. Faculty of Sciences, University of Extremadura, Avda de Elvas S/N., E-06006, Badajoz, Spain.
authors.forename: Maria J
authors.initials: MJ
authors.lastname: Muñoz-Peña
authors.affiliation: Department of Organic and Inorganic Chemistry. Faculty of Sciences, University of Extremadura, Avda de Elvas S/N., E-06006, Badajoz, Spain.
authors.forename: Teresa
authors.initials: T
authors.lastname: González
authors.affiliation: Department of Organic and Inorganic Chemistry. Faculty of Sciences, University of Extremadura, Avda de Elvas S/N., E-06006, Badajoz, Spain.
authors.forename: Patricia
authors.initials: P
authors.lastname: Palo
authors.affiliation: Department of Organic and Inorganic Chemistry. Faculty of Sciences, University of Extremadura, Avda de Elvas S/N., E-06006, Badajoz, Spain. emcc@unex.es.
authors.forename: Eduardo M
authors.identifier: http://orcid.org/0000-0001-6519-7615
authors.initials: EM
authors.lastname: Cuerda-Correa
mesh_terms: D001895:Boron / Q000737:chemistry*; D002713:Chlorine / Q000737:chemistry; D018130:Diamond / Q000737:chemistry*; D004563:Electrochemistry; D004566:Electrodes; D010084:Oxidation-Reduction; D010226:Parabens / Q000737:chemistry*; D014867:Water / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D010226:Parabens; D014874:Water Pollutants, Chemical; D014867:Water; D002713:Chlorine; D018130:Diamond; D001895:Boron
keywords: BDD electrooxidation; EAOPs; Parabens; Response surface methodology; River water