title: Advanced electro-Fenton degradation of biologically-treated coking wastewater using anthraquinone cathode and Fe-Y catalyst.
abstract: The electrocatalytic activity of bare and 2-ethyl anthraquinone-modified graphite felt (2-EAQ/GF) toward oxygen reduction was investigated using a cyclic voltammetry technique in a neutral solution. The prepared cathodes were tested for electrogeneration of H2O2 and electro-Fenton oxidation (EFO) treatment of neutral coking wastewater (CW) after biological process, using a graphite anode and Fezeolite Y catalyst. The results showed that (i) H2O2 yield and current efficiency greatly depended on cathodic potential and materials; (ii) hydroxyl radicals, generated from Fe-zeolite Y-catalyzed H2O2 decomposition, played a great role in EFO treatment, while anodic direct and indirect oxidation was insignificant; (iii) chemical oxygen demand, total organic carbon (TOC) and acute toxicity of wastewater decreased by 40-50, 30-40 and 50-60%, respectively, and biodegradability increased after 1 h of EFO treatment. Due to the free-pH adjustment, EFO presents a potential engineering application for advanced treatment of CW.
authors: School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
authors: Haitao
authors: H
authors: Li
authors: Yuping
authors: Y
authors: Li
authors: Hongbin
authors: H
authors: Cao
authors: Xingang
authors: X
authors: Li
authors: Yi
authors: Y
authors: Zhang
mesh_terms: D000880:Anthraquinones / Q000737:chemistry; D002384:Catalysis; D003077:Coke; D004563:Electrochemistry / Q000295:instrumentation / Q000379:methods*; D006108:Graphite / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000737:chemistry; D010084:Oxidation-Reduction; D014865:Waste Disposal, Fluid; D014877:Water Pollution, Chemical / Q000517:prevention & control*; D018508:Water Purification / Q000295:instrumentation / Q000379:methods*; D017641:Zeolites / Q000737:chemistry
chemical_list: D000880:Anthraquinones; D003077:Coke; C045076:Fenton's reagent; D017641:Zeolites; D006108:Graphite; D006861:Hydrogen Peroxide; D007501:Iron