Improved Fe2O3/Al2O3 Systems for the Oxidation of a Model Organic Pollutant Using H2O2 as Oxidant
Carla di Luca, Fernando Ivorra, Paola Massa, Rosa Fenoglio and Francisco Medina Cabello
Affiliation: INTEMA- Fac. de Ingeniería, CONICET/Universidad Nac. de Mar del Plata, J.B. Justo 4302 (7600) Mar del Plata, Argentina.
Different Fe2O3/Al2O3 catalysts (4 wt% Fe) were prepared and characterized by N2 physisorption, SEM-EDX,
TGA and XRD. The systems were tested for the oxidation of high concentration phenol solutions (5 g/L) in a batch reactor
at 50 °C, using H2O2 as oxidant. In order to enhance the catalyst stability two strategies were combined: an elevated
temperature of calcination (900 °C) and pre-treatments with different organic acids (acetic, oxalic acid). The stability of
the catalyst was improved significantly (leaching levels were reduced by up to 70%), with a good performance over the
global oxidation process: mineralization levels of ca. 50% with oxidant consumption efficiencies of around 75%.
Keywords: CWPO, H2O2, iron, Al2O3, phenol, lixiviation.
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