CWPO of 4-CP and industrial wastewater with Al-Fe pillared clays.
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 degrees C and atmospheric pressure and the influence of Fe load, catalyst concentration and H(2)O(2)/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.
Molina
C B
CB
Departmental Section of Chemical Engineering, University Autónoma of Madrid, km 15 Colmenar Road, 28049 Madrid, Spain. carmenbelen.molina@uam.es
Zazo
J A
JA
Casas
J A
JA
Rodriguez
J J
JJ
D000538:Aluminum Silicates / Q000138:chemical synthesis*; D002733:Chlorophenols / Q000737:chemistry*; D000077215:Clay; D007220:Industrial Waste; D010084:Oxidation-Reduction; D014865:Waste Disposal, Fluid; D014874:Water Pollutants, Chemical / Q000737:chemistry*
D000538:Aluminum Silicates; D002733:Chlorophenols; D007220:Industrial Waste; D014874:Water Pollutants, Chemical; C029107:4-chlorophenol; D000077215:Clay