Mineralization enhancement of a recalcitrant pharmaceutical polluant in water by advanced oxydation hybrid processes

Fabiola Mendez-Arriaga , Ricardo Torres-Palma (1, 2) , Christian Pétrier (3) , Santi Esplugas , J. Gimenez , Cesar Pulgarin (4)

1 Grupo de Electroquímica
2 LOCIE - LabOratoire proCédés énergIe bâtimEnt
3 LEPMI - Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces
4 laboratoire de Technologie des Poudres

Degradation of the biorecalcitrant pharmaceutical micropollutant ibuprofen (IBP) was carried out by means of several advanced oxidation hybrid configurations. TiO2 photocatalysis, photo-Fenton and sonolysis – all of them under solar simulated illumination – were tested in the hybrid systems: sonophoto-Fenton (FS), sonophotocatalysis (TS) and TiO2/Fe2+/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 TiO2 in the presence of ultrasound irradiation (TS). In contrast only 26% of mineralization was observed by photocatalysis with H2O2 (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.

Domaines: Autre

Fabiola Mendez-Arriaga, Ricardo Torres-Palma, Christian Pétrier, Santi Esplugas, J. Gimenez, et al.. Mineralization enhancement of a recalcitrant pharmaceutical polluant in water by advanced oxydation hybrid processes. Water Research, 2009, 43 (16), pp.3984-3991. ⟨10.1016/j.watres.2009.06.059⟩. ⟨hal-00576018⟩