title: Catalytic wet peroxide oxidation of phenol over Fe-exchanged pillared beidellite.
abstract: This study presents an evaluation of the catalytic performances of a Fe-exchanged Al-pillared synthetic beidellite for the wet hydrogen peroxide oxidation of phenolic aqueous wastes. The catalyst was prepared by a cation doping technique, its properties being determined by DRX, BET and chemical analysis techniques. All the tests were performed on a laboratory scale set-up. Important factors affecting catalyst activity and phenol removal efficiencies were studied, i.e. the effect of pH, temperature, catalyst concentration and the stability of the catalyst. The experimental results indicate that the use of this catalyst allows a total elimination of phenol and a significant removal of chemical oxygen demand, without significant leaching of Fe ions. Thus, considering the lowest Fe concentrations in solution after oxidation, at pH=5, 50 degrees C, and 180 min. COD removal efficiency of 87.9% was obtained. It was also observed that by using this catalyst, it is possible to extend the range of pH values for which Fenton-type oxidations can occur.
authors.affiliation: Department of Environmental Engineering, Faculty of Industrial Chemistry, Bd. D. Mangeron 71A, 6600 Iasi, Romania. ccatrine@ch.tuiasi.ro
authors.forename: Cezar
authors.initials: C
authors.lastname: Catrinescu
authors.forename: Carmen
authors.initials: C
authors.lastname: Teodosiu
authors.forename: Matei
authors.initials: M
authors.lastname: Macoveanu
authors.forename: Jocelyne
authors.initials: J
authors.lastname: Miehe-Brendlé
authors.forename: Ronan
authors.initials: R
authors.lastname: Le Dred
mesh_terms: D000538:Aluminum Silicates / Q000737:chemistry*; D002384:Catalysis; D004202:Disinfectants / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry; D007220:Industrial Waste; D007501:Iron / Q000737:chemistry; D016877:Oxidants / Q000737:chemistry; D010084:Oxidation-Reduction; D019800:Phenol / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D000538:Aluminum Silicates; D004202:Disinfectants; D007220:Industrial Waste; D016877:Oxidants; C010863:beidellite; D019800:Phenol; D006861:Hydrogen Peroxide; D007501:Iron