title: Fe3-xCuxO4 as highly active heterogeneous Fenton-like catalysts toward elemental mercury removal.
abstract: A series of novel spinel Fe3-xCuxO4 (0<x<0.71) composites, synthesized by chemical co-precipitation method, are proposed synthesized to use as highly active heterogeneous Fenton-like catalysts to remove elemental mercury (Hg0) from the simulated flue gases. Inductively coupled plasma-Atomic emission spectrometry (ICP-AES), X-ray diffraction patterns (XRD), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) surface area, and X-ray photoelectron spectrometer (XPS) were used to characterize the catalysts. The catalysts were confirmed the presence of the redox pairs Fesurf2+/Fesurf3+ and Cusurf+/Cusurf2+ on the surface of the cubic structure. The performance of heterogeneous Fenton-like reactions for Hg0 removal was evaluated in a lab-scale bubbling reactor at the solution temperature of 50°C. The systematic studies on the effects of different catalysts, H2O2 concentration and solution pH values on Hg0 removal efficiencies were performed. The recycling of the Fe3-xCuxO4 catalysts in Fenton-like solution is stable and Hg0 removal efficiency remain above 90% after 3 cycles. The active hydroxyl radical (OH) generated during heterogeneous Fenton-like reactions was confirmed through electron spin resonance (ESR) spin-trapping technique. The Hg0 removal mechanism has been discussed based on the experimental and analytical results.
authors: State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 430074 Wuhan, Hubei, China.
authors: Changsong
authors: C
authors: Zhou
authors: State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 430074 Wuhan, Hubei, China. Electronic address: sunlushi@hust.edu.cn.
authors: Lushi
authors: L
authors: Sun
authors: School of Mechanical and Power Engineering, Henan Polytechnic University, 454000 Jiaozuo, Henan, China.
authors: Anchao
authors: A
authors: Zhang
authors: State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 430074 Wuhan, Hubei, China.
authors: Xiaofeng
authors: X
authors: Wu
authors: State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 430074 Wuhan, Hubei, China.
authors: Chuan
authors: C
authors: Ma
authors: State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 430074 Wuhan, Hubei, China. Electronic address: susheng@mail.hust.edu.cn.
authors: Sheng
authors: S
authors: Su
authors: State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 430074 Wuhan, Hubei, China.
authors: Song
authors: S
authors: Hu
authors: State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 430074 Wuhan, Hubei, China.
authors: Jun
authors: J
authors: Xiang
mesh_terms: D000537:Aluminum Oxide / Q000138:chemical synthesis; D002384:Catalysis; D003300:Copper / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry; D017665:Hydroxyl Radical; D008277:Magnesium Oxide / Q000138:chemical synthesis; D008628:Mercury / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D010084:Oxidation-Reduction; D056951:Photoelectron Spectroscopy; D013054:Spectrophotometry, Atomic; D014961:X-Ray Diffraction
chemical_list: D005290:Ferric Compounds; C111130:spinell; C000499:ferric oxide; D017665:Hydroxyl Radical; D008277:Magnesium Oxide; D003300:Copper; D006861:Hydrogen Peroxide; D008628:Mercury; D000537:Aluminum Oxide; C030973:cupric oxide
keywords: ()OH radicals; Elemental mercury; Fenton-like; Heterogeneous