title: Study of solar photo-Fenton system applied to removal of phenol from water.
abstract: This study evaluated the use of a Fenton's reaction in a falling film solar reactor (FFR), as a possible advanced oxidation process for the mineralization of the organic compound phenol in water. Preliminary tests were carried out to evaluate phenol degradation by photolysis and to select the optimal residence time in which to carry out the process using a solar photo-Fenton system. The variables studied were the initial phenol concentration (100 to 300 mg L(-1)), the [Phenol]:[H2O2] mass ratio (1.0 to 2.0) and the [H2O2]/[Fe2+] molar ratio (5 to 10). Phenol degradation of 99% and chemical oxygen demand (COD) reduction of 97% were obtained under the following reaction conditions: phenol concentration=200 mg L(-1), mass ratio [Phenol]:[H2O2]=1.5 and molar ratio [H2O2]/[Fe2+]=7.5. Overall mineralization was achieved using the solar photo-Fenton process to destroy phenol and COD. The solar photo-Fenton process using a FFR appears to be a viable method for removing phenols in wastewaters on an industrial scale.
authors.affiliation: School of Chemistry, Universidade Federal do Rio de Janeiro, 21941-909, Rio de Janeiro - RJ, Brazil E-mail: fabiana@eq.ufrj.br.
authors.forename: Layla F A
authors.initials: LF
authors.lastname: Freire
authors.affiliation: School of Chemistry, Universidade Federal do Rio de Janeiro, 21941-909, Rio de Janeiro - RJ, Brazil E-mail: fabiana@eq.ufrj.br.
authors.forename: Fabiana Valéria
authors.initials: FV
authors.lastname: da Fonseca
authors.affiliation: School of Chemistry, Universidade Federal do Rio de Janeiro, 21941-909, Rio de Janeiro - RJ, Brazil E-mail: fabiana@eq.ufrj.br.
authors.forename: Lidia
authors.initials: L
authors.lastname: Yokoyama
authors.affiliation: Pontifícia Universidade Católica do Rio de Janeiro and Peróxidos do Brasil Ltda. (Solvay Group), 22451-041, Rio de Janeiro - RJ, Brazil.
authors.forename: Luiz Alberto Cesar
authors.initials: LA
authors.lastname: Teixeira
mesh_terms: D057919:Biological Oxygen Demand Analysis; D006861:Hydrogen Peroxide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000737:chemistry*; D010084:Oxidation-Reduction; D019800:Phenol / Q000737:chemistry*; D010636:Phenols / Q000737:chemistry; D010782:Photolysis; D013472:Sunlight; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater; D014867:Water; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D006861:Hydrogen Peroxide; D007501:Iron; D019800:Phenol; D010636:Phenols; D062065:Wastewater; D014867:Water; D014874:Water Pollutants, Chemical; C045076:Fenton's reagent