Abstract
A series of Ce1-xFexO2 nanocatalysts, prepared by co-precipitation method, were applied for the catalytic oxidation of priority organic pollutants present in paper industry wastewater. To investigate the synergic effect of various Fe contents, detailed characterizations of Ce1-xFexO2 were done by Raman, XPS, XRD, TEM and EDX techniques. The addition of Fe to CeO2 lattice increased the amount of oxygen vacancies, which have an efficient role in the oxidation of organic pollutants under oxygen-rich conditions. Ce0.4Fe0.6O2 catalyst showed the highest removal of TOC (72%), AOX (68%), chlorophenols (62%) and chloroguaicols (86%). The superior catalytic activity of Ce0.4Fe0.6O2 is ascribed to its higher oxygen vacancy concentration. The presence of two oxidation states of Ce (4+,3+) and Fe (3+,2+) confirmed the role of redox couples in oxidation of organic pollutants.
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