title: Macrolide antibiotics removal using a circulating TiO2-coated paper photoreactor: parametric study and hydrodynamic flow characterization.
abstract: The present work investigates the photocatalytic degradation efficiency of biorecalcitrant macrolide antibiotics in a circulating tubular photoreactor. As target pollutants, spiramycin (SPM) and tylosin (TYL) were considered in this study. The photoreactor leads to the use of an immobilized titanium dioxide on non-woven paper under artificial UV-lamp irradiation. Maximum removal efficiency was achieved at the optimum conditions of natural pH, low pollutant concentration and a 0.35 L min(-1) flow rate. A Langmuir-Hinshelwood model was used to fit experimental results and the model constants were determined. Moreover, the total organic carbon analysis reveals that SPM and TYL mineralization is not complete. In addition, the study of the residence time distribution allowed us to investigate the flow regime of the reactor. Electrical energy consumption for photocatalytic degradation of macrolides using circulating TiO2-coated paper photoreactor was lower compared with some reported photoreactors used for the elimination of pharmaceutic compounds. A repetitive reuse of the immobilized catalyst was also studied in order to check its photoactivity performance.
authors.affiliation: Centre de Développement des Energies Renouvelables (CDER), 16340 Algiers, Algeria E-mail: amel_ounnar@yahoo.fr; a.ounnar@cder.dz; Université des Sciences et de la Technologie Houari Boumediene, Faculté de Génie Mécanique et de Génie des Procédés, Laboratoire des Phénomènes de Transfert, Bab-Ezzouar, 16111 Algiers, Algeria; Laboratoire «Chimie et Ingénierie des Procédés», Ecole Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, 35708 Rennes, France.
authors.forename: Amel
authors.initials: A
authors.lastname: Ounnar
authors.affiliation: Laboratoire «Chimie et Ingénierie des Procédés», Ecole Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, 35708 Rennes, France.
authors.forename: Abdelkrim
authors.initials: A
authors.lastname: Bouzaza
authors.affiliation: Laboratoire «Chimie et Ingénierie des Procédés», Ecole Nationale Supérieure de Chimie de Rennes, CNRS, UMR 6226, 35708 Rennes, France.
authors.forename: Lidia
authors.initials: L
authors.lastname: Favier
authors.affiliation: Université des Sciences et de la Technologie Houari Boumediene, Faculté de Génie Mécanique et de Génie des Procédés, Laboratoire des Phénomènes de Transfert, Bab-Ezzouar, 16111 Algiers, Algeria.
authors.forename: Fatiha
authors.initials: F
authors.lastname: Bentahar
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry; D002384:Catalysis; D011211:Electric Power Supplies; D057446:Hydrodynamics; D018942:Macrolides / Q000737:chemistry*; D008956:Models, Chemical; D010782:Photolysis; D010865:Pilot Projects; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D000900:Anti-Bacterial Agents; D018942:Macrolides; D014874:Water Pollutants, Chemical; C009495:titanium dioxide; D014025:Titanium