title: Enhanced Fenton-like degradation of refractory organic compounds by surface complex formation of LaFeO(3) and H(2)O(2).
abstract: Nanoscale LaFeO(3) was prepared via sol-gel method and characterized by XRD, FTIR and N2 adsorption/desorption experiment. The results indicated that, LaFeO(3) had a typical perovskite structure with a BET area of 8.5m(2)/g. LaFeO(3) exhibited excellent Fenton activity and stability for the degradation of pharmaceuticals and herbicides in water, as demonstrated with sulfamethoxazole, phenazone, phenytoin, acyclovir and 2,4-dichlorophenoxyacetic acid, 2-chlorophenol. Among them, sulfamethoxazole (SMX) could be completely removed in LaFeO(3)-H(2)O(2) system after reaction for 120 min at neutral pH. Based on the ATR-FTIR analysis, the surface complex of LaFeO(3) and H(2)O(2). was formed, which was important and essential for the enhanced Fenton reaction by accelerating the cycle of Fe(3+)/Fe(2+). Hence, more OH and O(2)(-)/HO(2)(-) were then produced in LaFeO(3)-H(2)O(2) system, resulting in more efficient removal of refractory organic compounds. Based on the surface interaction of LaFeO(3) and H(2)O(2), a heterogeneous Fenton reaction mechanism was proposed.
authors: Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan.
authors: Yulun
authors: Y
authors: Nie
authors: Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
authors: Lili
authors: L
authors: Zhang
authors: Department of Civil and Environmental Engineering, Graduate School of Engineering, Tohoku University, 6-6-06 Aza-Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan.
authors: Yu-You
authors: YY
authors: Li
authors: Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. Electronic address: huchun@rcees.ac.cn.
authors: Chun
authors: C
authors: Hu
mesh_terms: D015084:2,4-Dichlorophenoxyacetic Acid / Q000737:chemistry; D000212:Acyclovir / Q000737:chemistry; D000983:Antipyrine / Q000737:chemistry; D002384:Catalysis; D002733:Chlorophenols / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D010672:Phenytoin / Q000737:chemistry; D013420:Sulfamethoxazole / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods
chemical_list: D002733:Chlorophenols; D010087:Oxides; D014874:Water Pollutants, Chemical; C518665:lanthanum iron oxide; D015084:2,4-Dichlorophenoxyacetic Acid; D010672:Phenytoin; D006861:Hydrogen Peroxide; D013420:Sulfamethoxazole; C030683:2-chlorophenol; D000983:Antipyrine; D000212:Acyclovir
keywords: Heterogeneous Fenton reaction; LaFeO(3); Mechanism; Refractory organic compounds