Catalysts based on pillared clays with Al–Fe have been synthesised from a commercial bentonite and tested for catalytic wet peroxide oxidation (CWPO) of aqueous 4-Chlorophenol (4-CP) solution and industrial wastewater from cosmetics manufacture. The effect of the synthesis procedure, the iron load and reaction temperature on the catalytic activity was studied using 4-CP as target compound. A lower temperature in the preparation of the pillaring solution, as well as a higher Fe load, gave rise to a higher catalytic activity, but also a higher leaching of the active phase. The best catalyst, in terms of catalytic activity, was also tested for treating cosmetic wastewater by CWPO. Experiments were carried out at 90°C and atmospheric pressure and the influence of Fe load, catalyst concentration and H2O2/COD ratio (between 0.5 and 2 times the stoichiometric ratio) were analysed. Higher values of these parameters favour COD reduction. The Fe leaching in all cases was lower than 1.2 mg/L, indicating that these catalysts have a high stability under these experimental conditions.
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Research Article| April 01 2010
CWPO of 4-CP and industrial wastewater with Al–Fe pillared clays
C. B. Molina;
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J. A. Zazo;
J. A. Casas;
Water Sci Technol (2010) 61 (8): 2161–2168.
C. B. Molina, J. A. Zazo, J. A. Casas, J. J. Rodriguez; CWPO of 4-CP and industrial wastewater with Al–Fe pillared clays. Water Sci Technol 1 April 2010; 61 (8): 2161–2168. doi: https://doi.org/10.2166/wst.2010.151
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