| YANG Zhi-liang,LU Xin-ru,XU Jian,WANG Chao-yang,LI Yi-feng,SUN Zhen-lu,TANG Wei-zhong.Experimental Study on Degradation of High Concentration Organic Wastewater Using Thick Boron Doped Diamond Film Electrodes[J],50(3):212-218 |
| Experimental Study on Degradation of High Concentration Organic Wastewater Using Thick Boron Doped Diamond Film Electrodes |
| Received:March 28, 2020 Revised:June 09, 2020 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2021.03.020 |
| KeyWord:thick boron doped diamond film electrochemical performance organic wastewater electrochemical oxidation |
| Author | Institution |
| YANG Zhi-liang |
Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing , China |
| LU Xin-ru |
Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing , China |
| XU Jian |
Beijing Yuanhan Environmental Technology Co., Ltd, Beijing , China |
| WANG Chao-yang |
Hebei Institute of Laser, Shijiazhuang , China |
| LI Yi-feng |
Hebei Institute of Laser, Shijiazhuang , China |
| SUN Zhen-lu |
Hebei Institute of Laser, Shijiazhuang , China |
| TANG Wei-zhong |
Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing , China |
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| Abstract: |
| This paper aims to explore the feasibility of BDD thick film electrode in the treatment of high concentration organic wastewater. The method used in this paper is to prepare BDD thick film electrodes using DC arc plasma injection process, characterize their structure and electrochemical properties, and use the BDD thick film as an electrolytic anode for electrochemical oxidation of high concentration simulated wastewater (glucose solution) and rubber auxiliary wastewater generated from actual industrial processes. Characterization of the electrodes revealed that the electrochemical window and oxygen evolution potential of the electrodes in a 0.5 mol/L H2SO4 solution were 3.02 V and 2.07 V, respectively. Experiments on the degradation of glucose solution (as simulative wastewater) and wastewater containing organic additives collected from rubber industry showed that the electrode has good removal ability for organic materials of the wastewaters. For a high- concentration glucose solution with an initial COD (chemical oxygen demand) value as high as 18 940 mg/L, 8-hour treatment decreased its COD value by 91.02%, while for high-concentration organic wastewater collected from rubber industry with an initial COD value of 18 380 mg/L, 10-hour treatment decreased the COD value of the wastewater by as high as 97.42%. It comes to the conclusion that the heavily doped BDD thick film electrode prepared by DC arc plasma jet method has wide electrochemical window and high oxygen evolution potential, which can effectively reduce the COD value of organic solution. The best working condition of BDD thick film electrode is:under the condition of high organic matter concentration, a higher current density should be selected to improve the degradation efficiency. For the high COD glucose solution and rubber additive wastewater in this experiment, the optimal current density is 200 mA. Under the condition of low organic matter concentration, in order to reduce energy consumption, a lower current density should be selected. For the low COD glucose solution in this experiment, the optimal current density is 50 mA. |
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