title: Dichloroacetic acid degradation employing hydrogen peroxide and UV radiation.
abstract: The degradation reaction of dichloroacetic acid employing H(2)O(2) and UVC radiation (253.7nm) has been studied in a well mixed reactor operating inside a recycling system. It has been shown that in an aqueous solution no stable reaction intermediates are formed and, at every time during the reaction, two mols of hydrochloric acid are formed for every mol of dichloroacetic acid that is decomposed and, in the same way, there is a paired agreement between the calculated TOC concentration corresponding to the unaltered dichloroacetic acid and the experimental values measured in the solution. On this basis and classical references from the scientific literature for the H(2)O(2) photolysis, a complete reaction scheme, apt for reaction kinetics mathematical modeling and ulterior scale-up is proposed.
authors.affiliation: INTEC (Universidad Nacional del Litoral and CONICET), Güemes 3450. (3000) Santa Fe, Argentina.
authors.forename: Cristina S
authors.initials: CS
authors.lastname: Zalazar
authors.forename: Marisol D
authors.initials: MD
authors.lastname: Labas
authors.forename: Rodolfo J
authors.initials: RJ
authors.lastname: Brandi
authors.forename: Alberto E
authors.initials: AE
authors.lastname: Cassano
mesh_terms: D002244:Carbon / Q000032:analysis; D002712:Chlorides / Q000032:analysis; D003999:Dichloroacetic Acid / Q000737:chemistry* / Q000528:radiation effects*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000528:radiation effects; D018508:Water Purification
chemical_list: D002712:Chlorides; D014874:Water Pollutants, Chemical; D002244:Carbon; D003999:Dichloroacetic Acid; D006861:Hydrogen Peroxide