Solar photo-Fenton mineralization of antipyrine in aqueous solution.
The mineralization of an aqueous solution of antipyrine (C11H12N2O), an emerging contaminant, using a solar photocatalytic oxidation process assisted with ferrioxalate was evaluated in a compound parabolic collector (CPC) pilot plant. Under the selected operating conditions ([H2O2] = 250 ppm, [Fe] = 14 ppm, pH = 2.7, and [(COOH)2·2H2O] = 80 ppm), 60% of TOC is removed just 5 min after treating an aqueous solution containing 50 ppm of antipyrine. The addition of oxalic acid up to a maximum concentration of 80 ppm significantly increases the mineralization rate during the first 15 min of the reaction. The synergism between the solar and dark H2O2/ferrioxalate process was quantified at 79%, calculated from the pseudo first-order mineralization rate constants. The operational costs due to the consumption of electrical energy, reagents and catalysts were calculated from the optimal conditions and compared with a novel sono-photocatalytic process using artificial UV-light. The results showed that the ferrioxalate-assisted solar photo-Fenton process was economically feasible, being able to achieve up to 60% mineralization with a total cost of 4.5 cent €/g TOC removed (1.1 €/m(3)).
Department of Chemical Engineering, Grupo IMAES, Escuela Técnica Superior de Ingenieros Industriales, Instituto de Investigaciones Energéticas y Aplicaciones Industriales (INEI), Universidad de Castilla-La Mancha, Avda. Camilo José Cela 3, 13071 Ciudad Real, Spain. Electronic address: Antonio.Duran@uclm.es.
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Durán
J M
JM
Monteagudo
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Sanmartín
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Carrasco
D000983:Antipyrine / Q000737:chemistry* / Q000528:radiation effects; D016571:Neural Networks, Computer; D010070:Oxalates / Q000737:chemistry; D010083:Oxidants, Photochemical; D010084:Oxidation-Reduction; D010865:Pilot Projects; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000528:radiation effects; D014876:Water Pollution / Q000032:analysis / Q000517:prevention & control; D018508:Water Purification / Q000379:methods
D010070:Oxalates; D010083:Oxidants, Photochemical; D014874:Water Pollutants, Chemical; C034942:ferrioxalate; D000983:Antipyrine
Antipyrine; Emerging contaminant; Pharmaceuticals; Solar radiation; TOC