title: Ultrasound-assisted heterogeneous Fenton-like degradation of tetracycline over a magnetite catalyst.
abstract: The degradation of tetracycline over Fe3O4 catalyst was studied by using a coupled ultrasound/heterogeneous Fenton process. The effects of some key reaction parameters, the evolution of toxicity, and the reaction mechanism were investigated. Experimental results showed that the stability of catalyst was significantly improved when ultrasound was employed. Under optimal conditions, 93.6% of tetracycline was removed after 60 min of treatment. The removal efficiency of the total organic carbon (TOC) at 60 min was 31.8%. The surface hydroxyl radicals were identified as the major reactive species during the oxidation process. Toxicity tests with Daphnia magna indicated that the toxicity of the solution increased during the first 60 min and then decreased as the oxidation proceeded.
authors.affiliation: Department of Environmental Engineering, Wuhan University, Wuhan 430079, China; College of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China; Université de Poitiers, IC2MP UMR 7285 CNRS, 4 rue Michel Brunet, 86022 Poitiers Cedex, France.
authors.forename: Liwei
authors.initials: L
authors.lastname: Hou
authors.affiliation: Department of Environmental Engineering, Wuhan University, Wuhan 430079, China.
authors.forename: Liguo
authors.initials: L
authors.lastname: Wang
authors.affiliation: Université de Poitiers, IC2MP UMR 7285 CNRS, 4 rue Michel Brunet, 86022 Poitiers Cedex, France. Electronic address: sebastien.royer@univ-poitiers.fr.
authors.forename: Sébastien
authors.initials: S
authors.lastname: Royer
authors.affiliation: Department of Environmental Engineering, Wuhan University, Wuhan 430079, China. Electronic address: eeng@whu.edu.cn.
authors.forename: Hui
authors.initials: H
authors.lastname: Zhang
mesh_terms: D000818:Animals; D002384:Catalysis; D003621:Daphnia; D052203:Ferrosoferric Oxide / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000737:chemistry; D007501:Iron / Q000737:chemistry; D013752:Tetracycline / Q000737:chemistry* / Q000528:radiation effects; D018675:Toxicity Tests; D000069453:Ultrasonic Waves; D014874:Water Pollutants, Chemical / Q000737:chemistry* / Q000528:radiation effects; D018508:Water Purification / Q000379:methods*
chemical_list: C045076:Fenton's reagent; D014874:Water Pollutants, Chemical; D006861:Hydrogen Peroxide; D007501:Iron; D013752:Tetracycline; D052203:Ferrosoferric Oxide
keywords: Acute toxicity; Heterogeneous Fenton; Magnetite; Tetracycline; Ultrasound