title: Design of a neutral three-dimensional electro-Fenton system with foam nickel as particle electrodes for wastewater treatment.
abstract: In this work, we demonstrate a novel three-dimensional electro-Fenton system (3D-E-Fenton) for wastewater treatment with foam nickel, activated carbon fiber and Ti/RuO(2)-IrO(2) as the particle electrodes, the cathode, and the anode respectively. This 3D-E-Fenton system could exhibit much higher rhodamine B removal efficiency (99%) than the counterpart three-dimensional electrochemical system (33%) and E-Fenton system (19%) at neutral pH in 30 min. The degradation efficiency enhancement was attributed to much more hydroxyl radicals generated in the 3D-E-Fenton system because foam nickel particle electrodes could activate molecular oxygen to produce O(2)(-) via a single-electron transfer pathway to subsequently generate more H(2)O(2) and hydroxyl radicals. This is the first observation of molecular oxygen activation over the particle electrodes in the three-dimensional electrochemical system. These interesting findings could provide some new insight on the development of high efficient E-Fenton system for wastewater treatment at neutral pH.
authors.affiliation: Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, People's Republic of China.
authors.forename: Wei
authors.initials: W
authors.lastname: Liu
authors.forename: Zhihui
authors.initials: Z
authors.lastname: Ai
authors.forename: Lizhi
authors.initials: L
authors.lastname: Zhang
mesh_terms: D000465:Algorithms; D057919:Biological Oxygen Demand Analysis; D004396:Coloring Agents / Q000737:chemistry; D004566:Electrodes; D004779:Environment Design; D016166:Free Radical Scavengers; D006861:Hydrogen Peroxide; D006863:Hydrogen-Ion Concentration; D017665:Hydroxyl Radical / Q000737:chemistry; D007202:Indicators and Reagents; D007501:Iron / Q000737:chemistry; D009532:Nickel / Q000737:chemistry*; D016877:Oxidants / Q000737:chemistry; D010100:Oxygen / Q000737:chemistry; D017382:Reactive Oxygen Species / Q000737:chemistry; D012235:Rhodamines / Q000737:chemistry / Q000302:isolation & purification; D014865:Waste Disposal, Fluid / Q000295:instrumentation*; D062065:Wastewater / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D004396:Coloring Agents; D016166:Free Radical Scavengers; D006861:Hydrogen Peroxide; D017665:Hydroxyl Radical; D007202:Indicators and Reagents; D007501:Iron; D009532:Nickel; D016877:Oxidants; D010100:Oxygen; D017382:Reactive Oxygen Species; D012235:Rhodamines; D062065:Wastewater; D014874:Water Pollutants, Chemical; C045076:Fenton's reagent; C029773:rhodamine B