title: Performance of electrochemical oxidation process for removal of di (2-ethylhexyl) phthalate.
abstract: Di (2-ethylhexyl) phthalate (DEHP) is the most detected and concentrated plasticizer in environment and wastewaters, worldwide. In this study, different operating parameters such as current intensity, treatment time, type of anodes, and supporting electrolytes were tested to optimized the electro-oxidation process (EOP) for the removal of DEHP in the presence of methanol as a dissolved organic matter. Among the anodes, the Nb/BDD showed the best degradation rate of DEHP, at low current intensity of 0.2 A after 90 min of treatment time with a percentage of degradation recorded of 81 %, compared to 70 % obtained with the Ti/IrO2-RuO2. Furthermore, due to the combination of direct and indirect oxidation, the removal of DEHP in the presence of 1 g/L Na2SO4 was higher than NaBr, even though the oxidant production of NaBr was 11.7 mmol/L against 3.5 mmol/L recorded in the presence of sulfate at 0.5 A and after 60 min of electrolysis time. Under optimal condition (current intensity = 0.5 A, time = 120 min, using Nb/BDD anode and Na2SO4 as supporting electrolyte), the removal of 87.2 % of DEHP was achieved. The total cost of 0.106 US$/m(3) of treated water was achieved based on economical optimization of reactor with current intensity of 0.2 A and 1 g/L Na2SO4.
authors.affiliation: Instituto de Ingeniería, Universidad Nacional Autónoma de México, Cd. Universitaria, 04510, México City, D.F., México.
authors.forename: Josué Daniel García
authors.initials: JD
authors.lastname: Espinoza
authors.affiliation: Institut national de la recherche scientifique (INRS-Eau, Terre et Environnement), Université du Québec, 490 rue de la Couronne, Québec, QC, G1K 9A9, Canada. patrick.drogui@ete.inrs.ca.
authors.forename: Patrick
authors.initials: P
authors.lastname: Drogui
authors.affiliation: Institut national de la recherche scientifique (INRS-Eau, Terre et Environnement), Université du Québec, 490 rue de la Couronne, Québec, QC, G1K 9A9, Canada.
authors.forename: Mehdi
authors.initials: M
authors.lastname: Zolfaghari
authors.affiliation: Institut national de la recherche scientifique (INRS-Eau, Terre et Environnement), Université du Québec, 490 rue de la Couronne, Québec, QC, G1K 9A9, Canada.
authors.forename: Ahmad
authors.initials: A
authors.lastname: Dirany
authors.affiliation: Instituto de Ingeniería, Universidad Nacional Autónoma de México, Cd. Universitaria, 04510, México City, D.F., México.
authors.forename: Maria Teresa Orta
authors.initials: MT
authors.lastname: Ledesma
authors.affiliation: Departamento de Biotecnología y Ciencias Alimentarias, Dirección de Recursos Naturales, Instituto Tecnológico de Sonora, Ciudad Obregón, Sonora, México.
authors.forename: Pablo
authors.initials: P
authors.lastname: Gortáres-Moroyoqui
authors.affiliation: Industrial research center of Quebec, 333 rue Franquet, Québec, QC, G1P 4C7, Canada.
authors.forename: Gerardo
authors.initials: G
authors.lastname: Buelna
mesh_terms: D004051:Diethylhexyl Phthalate / Q000032:analysis*; D004566:Electrodes; D004572:Electrolysis / Q000379:methods*; D010084:Oxidation-Reduction; D013431:Sulfates / Q000737:chemistry; D013997:Time Factors; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000379:methods*
chemical_list: D004051:Diethylhexyl Phthalate; D013431:Sulfates; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Di (2-ethylhexyl) phthalate (DEHP); Direct oxidation; Electro-oxidation process (EOP); Indirect oxidation; Removal efficiency