TiO2-SnO2 coated bamboo biochar for electrochemical treatment of coking wastewater |
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| Authors: | ZHANG Tingting LIU Yongjun ZHOU Chengtao DONG Xin LIU Jiachen |
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| Affiliation: | 1.School of Environmental and Municipal Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, Shaanxi, China;2.Key Laboratory of Northwest Water Resource, Ecology and Environment, Ministry of Education, Xi’an University of Architecture and Technology, Xi’an 710055, Shaanxi, China;3.No. 6 Engineering Corporation Limited of CR20G, Xi’an 710032, Shaanxi, China;4.Inner Mongolia University of Science and Technology, Baotou 014010, Inner Mongolia, China |
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| Abstract: | A new type of bamboo biochar (BC) loaded TiO2-SnO2 particle electrode was prepared and characterized by SEM, FT-IR, BET and XRD for efficient treatment of the coking wastewater in a three-dimensional electrochemical reaction system(3DERs). The results showed that bamboo biochar had a dense microporous space structure, and a significant amount of Ti-Sn oxides existed on the surface and in the interior of the BC. The removal rates of COD and DOC in coking wastewater reached to 73.96% and 66.72% respectively, and UV254 reduced from 6.65 cm-1 to 3.00 cm-1 by the electrolysis treatment of 150 min at the current density of 30 mA/cm2. The three-dimensional fluorescence spectra indicated that the most of the soluble organic compounds and soluble microbial by-products were degraded and transformed. The addition of Ti and Sn enhanced the efficacy of the electrooxidation, electro-adsorption and electrocatalytic behavior of the BC particle electrodes, which improved the treatment effect on coking wastewater in the 3DERs. In addition, this study provides the possibility of basic research for the engineering practice of electrochemical oxidation treatment of coking wastewater. |
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| Keywords: | particle electrodes coking wastewater bamboo biochar catalysis electrochemical oxidation |
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