Hou Jing, Li Xue, Yan Yuting, Wang Lizhang
Environmental Energy Engineering (E3) Workgroup, School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou 221116, China.
Int J Environ Res Public Health. 2022 Apr 14;19(8):4775. doi: 10.3390/ijerph19084775.
The efficient removal and kinetic modelling of methyl orange (MO) degradation using an electrocatalytic oxidation method in an activated carbon (AC) packed electrode reactor (ACPER) were conducted. A significantly high (81.2%) chemical oxygen demand (COD) and 100.0% MO decolorization efficiency were observed under the experimental conditions of current density of 3.0 mA·cm, flow velocity of 0.3 L·h, and treatment duration of 1.68 h using a -PbO/Ti anode. The high removal efficiency is ascribed to the anode expansion effect after AC packing. The anode expansion coefficient () of the ACPER was calculated to be 0.63 from the cyclic voltammetry (CV) measurement, which means the further current utilization for MO oxidation. Based on the current utilization efficiency on anodic and particle electrode surfaces, a phase-reaction kinetics model was proposed for the simulation of MO COD removal efficiency. Our simulation results showed that the newly established average current efficiency () and energy consumption () model well matched the MO experimental degradation data. Our work broadens the scope of the application of ACPER in the treatment industry wastewater containing organics and provides a new strategy for the energy utilization evaluation during the removal of organic matter by electrocatalytic oxidation.
采用填充活性炭（AC）的电极反应器（ACPER）中的电催化氧化方法，对甲基橙（MO）降解进行了高效去除及动力学建模研究。使用-PbO/Ti阳极，在电流密度为3.0 mA·cm、流速为0.3 L·h、处理时长为1.68 h的实验条件下，观察到化学需氧量（COD）显著较高（81.2%），MO脱色效率达100.0%。高去除效率归因于AC填充后阳极的膨胀效应。通过循环伏安法（CV）测量，计算得出ACPER的阳极膨胀系数（）为0.63，这意味着有更多电流用于MO氧化。基于阳极和颗粒电极表面的电流利用效率，提出了一个相反应动力学模型来模拟MO的COD去除效率。我们的模拟结果表明，新建立的平均电流效率（）和能耗（）模型与MO实验降解数据匹配良好。我们的工作拓宽了ACPER在处理含有机物质工业废水方面的应用范围，并为电催化氧化去除有机物过程中的能量利用评估提供了新策略。
