title: Rapid decolourization and mineralization of the azo dye C.I. Acid Red 14 by heterogeneous Fenton reaction.
abstract: The decolourization and mineralization of a solution of an azo dye using a catalyst based on Fe(II) supported on Y Zeolite (Fe(II)-Y Zeolite) and adding hydrogen peroxide (heterogeneous Fenton process) have been studied. The catalyst was prepared by ion exchange, starting from a commercial ultra-stable Y Zeolite. All experiments were performed on a laboratory scale set-up. The effects of different parameters such as initial concentration of the dye, initial pH of the solution of the dye, H(2)O(2) concentration, temperature and ratio of amount of catalyst by amount of solution on the decolourization efficiency of the process were investigated. A percentage of colour removal of 99.3±0.2% and a mineralization degree of 84±5% of the solution of the dye were achieved in only 6 min of contact time between the catalyst and the solution, under the following conditions: initial concentration of the dye of 50 ppm, pH 5.96, 8.7 mM of H(2)O(2), T of 80°C and catalyst concentration of 15 g/L. Moreover, the catalyst Fe(II)-Y Zeolite can be easily filtered from the solution, does not leach any iron into the solution (avoiding any secondary contamination due to the metal) and its effectivity can be reproduced after consecutive experiments.
authors.affiliation: Centre Grup de Tècniques de Separació en Química (GTS), Departament de Química, Universitat Autònoma de Barcelona, Bellaterra, Spain.
authors.forename: Rajaa
authors.initials: R
authors.lastname: Idel-aouad
authors.forename: Manuel
authors.initials: M
authors.lastname: Valiente
authors.forename: Abdlrani
authors.initials: A
authors.lastname: Yaacoubi
authors.forename: Boumediene
authors.initials: B
authors.lastname: Tanouti
authors.forename: Montserrat
authors.initials: M
authors.lastname: López-Mesas
mesh_terms: D001391:Azo Compounds; D002384:Catalysis; D003116:Color; D006861:Hydrogen Peroxide / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007501:Iron; D007700:Kinetics; D008903:Minerals / Q000737:chemistry*; D013696:Temperature
chemical_list: C469409:Acid red 14; D001391:Azo Compounds; C045076:Fenton's reagent; D008903:Minerals; D006861:Hydrogen Peroxide; D007501:Iron