title: Effect of a solar Fered-Fenton system using a recirculation reactor on biologically treated landfill leachate.
abstract: The effects of electrochemical oxidation (EO), Fered-Fenton and solar Fered-Fenton processes using a recirculation flow system containing an electrochemical cell and a solar photo-reactor on biochemically treated landfill leachate were investigated. The most successful method was solar Fered-Fenton which achieved 66.5% COD removal after 120min treatment utilizing the optimum operating conditions of 47mM H2O2, 0.29mM Fe(2+), pH0 of 3.0 and a current density of 60mA/cm(2). The generation of hydroxyl radicals (OH) are mainly from Fered-Fenton process, which is enhanced by the introduction of renewable solar energy. Moreover, Fe(2+)/chlorine and UV/chlorine processes taking place in this system also result in additional production of OH due to the relatively high concentration of chloride ions contained in the leachate. The energy consumption was 74.5kWh/kg COD and the current efficiency was 36.4% for 2h treatment. In addition, the molecular weight (MW) distribution analysis and PARAFAC analysis of excitation emission matrix (EEM) fluorescence spectroscopy for different leachate samples indicated that the organics in the leachate were significantly degraded into either small molecular weight species or inorganics.
authors: Department of Environmental Engineering, Wuhan University, Wuhan 430079, China.
authors: Zhihong
authors: Z
authors: Ye
authors: Department of Environmental Engineering, Wuhan University, Wuhan 430079, China; Shenzhen Research Institute of Wuhan University, Shenzhen 518057, China. Electronic address: eeng@whu.edu.cn.
authors: Hui
authors: H
authors: Zhang
authors: Department of Environmental Engineering, Wuhan University, Wuhan 430079, China.
authors: Lin
authors: L
authors: Yang
authors: Department of Environmental Engineering, Wuhan University, Wuhan 430079, China.
authors: Luxue
authors: L
authors: Wu
authors: Department of Environmental Engineering, Wuhan University, Wuhan 430079, China.
authors: Yue
authors: Y
authors: Qian
authors: Department of Environmental Engineering, Wuhan University, Wuhan 430079, China.
authors: Jinyao
authors: J
authors: Geng
authors: Department of Environmental Engineering, Wuhan University, Wuhan 430079, China.
authors: Mengmeng
authors: M
authors: Chen
mesh_terms: D057919:Biological Oxygen Demand Analysis; D002713:Chlorine / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D017665:Hydroxyl Radical / Q000737:chemistry; D007501:Iron / Q000737:chemistry*; D016877:Oxidants / Q000737:chemistry*; D014466:Ultraviolet Rays; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D016877:Oxidants; D014874:Water Pollutants, Chemical; D017665:Hydroxyl Radical; D002713:Chlorine; D006861:Hydrogen Peroxide; D007501:Iron
keywords: COD; EEM; Landfill leachate; PARAFAC; Solar Fered-Fenton