title: Fenton treatment of complex industrial wastewater: optimization of process conditions by surface response method.
abstract: Remediation of industrial wastewaters represents a stringent problem in modern society, which requires particular understanding and ad hoc solutions. In this work, we performed extensive experimental study of chemical Fenton oxidation in order to understand the optimal operative conditions to be applied in real industrial wastewaters treatment. We analyzed the effectiveness of chemical oxygen demand (COD) removal from different wastewaters within a wide range of initial COD content. We observed a maximum COD % removal of about 80%, assessing the efficiency of the process. In order to understand the role of different reagents in the final yield, we performed a factorial experimental approach on the Fenton's reagents (H(2)O(2) and Fe(2+)) and analyzed the results developing an analytical second-order model. The model depends on three variables, namely: the initial [COD(i)] of the sample, the [COD(i)]/[H(2)O(2)] ratio and [H(2)O(2)]/[Fe(2+)] ratio. We obtained an accurate description of the COD % removal in different initial conditions, with a R(2)=0.85. In particular, we observed that optimal quantities of Fenton's reagents are a function of the initial COD of the treated wastes.
authors.affiliation: Department of Chemical, Chemical Engineering and Materials, University of L'Aquila, Via Campo di Pile-Zona industriale di Pile, 67100 L'Aquila, Italy. barbara.bianco@univaq.it
authors.forename: Barbara
authors.initials: B
authors.lastname: Bianco
authors.forename: Ida
authors.initials: I
authors.lastname: De Michelis
authors.forename: Francesco
authors.initials: F
authors.lastname: Vegliò
mesh_terms: D003627:Data Interpretation, Statistical; D015386:Hazardous Substances / Q000032:analysis; D006861:Hydrogen Peroxide / Q000737:chemistry*; D017665:Hydroxyl Radical / Q000737:chemistry; D007202:Indicators and Reagents; D007220:Industrial Waste; D007501:Iron / Q000737:chemistry*; D008962:Models, Theoretical; D016877:Oxidants / Q000737:chemistry; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: C045076:Fenton's reagent; D015386:Hazardous Substances; D007202:Indicators and Reagents; D007220:Industrial Waste; D016877:Oxidants; D017665:Hydroxyl Radical; D006861:Hydrogen Peroxide; D007501:Iron; D010100:Oxygen