title: Ni/Fe-supported over hydrotalcites precursors as catalysts for clean and selective oxidation of Basic Yellow 11: reaction intermediates determination.
abstract: In this work, Basic Yellow 11 (BY 11) was employed as model compound to study catalytic wet air oxidation as a pre-treatment step to the conventional biological oxidation. Ni and Fe catalysts supported over hydrotalcite (HT) were prepared by incipient wetness and excess impregnation to obtain catalysts with different metal loadings (from 1 to 10 wt.%). HTs were synthesized by co-precipitation and characterized with XRD, X-ray fluorescence (XRF), BET, thermogravimetric analysis and SEM. Results showed that dye conversion increased with Ni and Fe content up to 7 wt.% and that the most effective catalyst were prepared by incipient wetness impregnation. The influence of metal loading in the catalyst, and the preparation method as well as the reaction conditions was investigated. A mechanism and reaction pathways for BY 11 during catalytic liquid phase oxidation have also been proposed.
authors.affiliation: Grupo de Catálisis y Procesos de Separación, Departamento de Ingeniería Química, Universidad Complutense de Madrid, Avda. Complutense s/n, 28040 Madrid, Spain. G.Ovejero@quim.ucm.es
authors.forename: G
authors.initials: G
authors.lastname: Ovejero
authors.forename: A
authors.initials: A
authors.lastname: Rodríguez
authors.forename: A
authors.initials: A
authors.lastname: Vallet
authors.forename: J
authors.initials: J
authors.lastname: García
mesh_terms: D000536:Aluminum Hydroxide; D002384:Catalysis; D007211:Indoles / Q000032:analysis / Q000737:chemistry*; D007220:Industrial Waste / Q000032:analysis; D007501:Iron / Q000737:chemistry*; D008276:Magnesium Hydroxide; D009532:Nickel / Q000737:chemistry*; D010084:Oxidation-Reduction; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry*; D018508:Water Purification / Q000379:methods
chemical_list: D007211:Indoles; D007220:Industrial Waste; D014874:Water Pollutants, Chemical; C010467:hydrotalcite; C562161:basic yellow 11; D000536:Aluminum Hydroxide; D009532:Nickel; D007501:Iron; D008276:Magnesium Hydroxide