title: Kinetic study of imidacloprid removal by advanced oxidation based on photo-Fenton process.
abstract: In this paper, the kinetics of Imidacloprid removal from aqueous solution by photo-Fenton processes is presented. Experiments were conducted in batch mode, using a two litre jacketed Pyrex glass reactor, fitted with magnetic stirring, and six 6 W black light fluorescent lamps (lambdamax 365 nm), arranged in parallel to the reactor axis. The effect of initial Fe(II) concentration (< 0.7 mM), incident photon flux (0 to 5 x10(-6) Einstein s(-1)), and temperature (288-313K) on the rate of Imidacloprid oxidation is also assessed. When Fe(II) is present as the initial source of iron ions, a first stage of almost instantaneous Imidacloprid removal is observed, followed by a slower process. A simplified kinetic model is described and fitted well experimental data, and could be used for process design, optimization, and control purposes.
authors.affiliation: Chemical Engineering Department, University of Concepcion, PO Box 160-C, Correo 3, Concepcion, Chile. czaror@udec.cl
authors.forename: Claudio
authors.initials: C
authors.lastname: Zarora
authors.forename: Cristina
authors.initials: C
authors.lastname: Segura
authors.forename: Hector
authors.initials: H
authors.lastname: Mansilla
authors.forename: Maria A
authors.initials: MA
authors.lastname: Mondaca
authors.forename: Patricia
authors.initials: P
authors.lastname: Gonzalez
mesh_terms: D006861:Hydrogen Peroxide / Q000737:chemistry*; D007093:Imidazoles / Q000302:isolation & purification*; D007501:Iron / Q000737:chemistry*; D007700:Kinetics; D000073943:Neonicotinoids; D009574:Nitro Compounds / Q000302:isolation & purification*; D010084:Oxidation-Reduction; D010575:Pesticides / Q000302:isolation & purification*; D010777:Photochemistry
chemical_list: C045076:Fenton's reagent; D007093:Imidazoles; D000073943:Neonicotinoids; D009574:Nitro Compounds; D010575:Pesticides; C082359:imidacloprid; D006861:Hydrogen Peroxide; D007501:Iron