title: A new strategy for determination of current efficiency during electro-oxidation of aromatic compounds in a packed-bed system.
abstract: The electro-oxidation of aromatic compounds in 4,4'-diaminostilbene-2,2'-disulfonic (DSD) acid wastewater on IrO2-Ta2O5/Ti anodes was studied. The current efficiency was evaluated in terms of chemical oxygen demand (COD) by introducing a new factor, the fraction of the Faradaic current to the total cell current (beta) through the network analysis of packed bed electrode system (PBEs). Experimental results using an up-flow PBEs at current intensities ranging from 5 to 16 A m(-2), flow rates ranging from 20 to 80 L h(-1) and inter-electrode distance of 5 to 50 cm are in good agreement with the proposed equation. In addition, lower current density, increasing flow rate and larger inter-electrode distance are beneficial to enhance the current efficiency.
authors: School of Environmental Science and Spatial Informatics, China University of Mining and Technology, South Jiefang Road, Quanshan District, Xuzhou City, JiangSU, 221008, P. R. China. wlzh0731@126.com
authors: Lizhang
authors: L
authors: Wang
authors: Yuemin
authors: Y
authors: Zhao
authors: Qingyu
authors: Q
authors: Gao
authors: Cheng
authors: C
authors: Qian
authors: Yunlong
authors: Y
authors: Hu
mesh_terms: D004572:Electrolysis / Q000379:methods*; D006841:Hydrocarbons, Aromatic / Q000737:chemistry*; D010084:Oxidation-Reduction; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D006841:Hydrocarbons, Aromatic; D014874:Water Pollutants, Chemical