Abstract:Two electrode systems of β-PbO2/Ti-Ti and BDD/Si-Ti were systematically compared for the performance in treating reverse osmosis concentrate (ROC) from a real printing and dyeing industry. Kinetics of simultaneous remove chemical oxygen demand (COD) and total nitrogen (TN), as well as the improvement of the biochemical properties of the effluent were also investigated. It is shown that the BDD/Si-Ti electrode system has a high anodic oxygen evolution reaction (OER) potential (2.45V) and chlorine evolution reaction (CER) potential (1.90V), and the absolute values of anodic oxidation potential and cathodic reduction potential are higher than those of the β-PbO2/Ti-Ti electrode system; the degradation of COD and TN followed pseudo-first-order kinetics. The BDD/Si-Ti electrode system is more effective in COD removal and current efficiency while the β-PbO2/Ti-Ti electrode system is more effective in TN removal. Electrolysis at a low current density (5mA/cm2) for 15min resulted in a rise in BOD/COD from 0.18 to 0.42 (a 1.33-fold enhancement) for the ROC for the β-PbO2/Ti-Ti electrode system, while the BDD/Si-Ti electrode system only showed a 0.78-fold enhancement. As a result, the BDD/Si-Ti electrode system is suitable for pollutant mineralization, and the β-PbO2/Ti-Ti system is more suitable for the improvement of wastewater biochemical properties.
刘梓锋, 郑睿豪, 周青青, 王家德, 史学儒. β-PbO2和BDD电极处理印染反渗透浓水性能[J]. 中国环境科学, 2022, 42(6): 2671-2679.
LIU Zi-feng, ZHENG Rui-hao, ZHOU Qing-qing, WANG Jia-de, SHI Xue-ru. Performance comparison of β-PbO2 and BDD electrodes for treating reverse osmosis concentrate in printing and dyeing industry. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(6): 2671-2679.
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