title: Mineralization enhancement of a recalcitrant pharmaceutical pollutant in water by advanced oxidation hybrid processes.
abstract: Degradation of the biorecalcitrant pharmaceutical micropollutant ibuprofen (IBP) was carried out by means of several advanced oxidation hybrid configurations. TiO(2) photocatalysis, photo-Fenton and sonolysis - all of them under solar simulated illumination - were tested in the hybrid systems: sonophoto-Fenton (FS), sonophotocatalysis (TS) and TiO(2)/Fe(2+)/sonolysis (TFS). In the case of the sonophoto-Fenton process, the IBP degradation (95%) and mineralization (60%) were attained with photo-Fenton (FH). The presence of ultrasonic irradiation slightly improves the iron catalytic activity. On the other hand, total removal of IBP and elimination of more than 50% of dissolved organic carbon (DOC) were observed by photocatalysis with TiO(2) in the presence of ultrasound irradiation (TS). In contrast only 26% of mineralization was observed by photocatalysis with H(2)O(2) (TH) in the absence of ultrasound irradiation. Additional results showed that, in the TFS system, 92% of DOC removal and complete degradation of IBP were obtained within 240 min of treatment. The advanced oxidation hybrid systems seems to be a promising alternative for full elimination/mineralization for the recalcitrant micro-contaminant IBP.
authors.affiliation: Chemical Engineering Department, University of Barcelona, Marti i Franquès 1, 08028, Barcelona, Spain. fmendeza@ub.edu
authors.forename: F
authors.initials: F
authors.lastname: Méndez-Arriaga
authors.forename: R A
authors.initials: RA
authors.lastname: Torres-Palma
authors.forename: C
authors.initials: C
authors.lastname: Pétrier
authors.forename: S
authors.initials: S
authors.lastname: Esplugas
authors.forename: J
authors.initials: J
authors.lastname: Gimenez
authors.forename: C
authors.initials: C
authors.lastname: Pulgarin
mesh_terms: D006861:Hydrogen Peroxide / Q000737:chemistry; D007052:Ibuprofen / Q000032:analysis / Q000737:chemistry*; D007501:Iron / Q000737:chemistry; D010084:Oxidation-Reduction; D010782:Photolysis; D014025:Titanium / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry*
chemical_list: C045076:Fenton's reagent; D014874:Water Pollutants, Chemical; C009495:titanium dioxide; D006861:Hydrogen Peroxide; D014025:Titanium; D007501:Iron; D007052:Ibuprofen