Skolotneva Ekaterina, Cretin Marc, Mareev Semyon
Physical Chemistry Department, Kuban State University, 149 Stavropolskaya str, 350040 Krasnodar, Russia.
Institut Europeen des Membranes, IEM-UMR 5635, ENSCM, CNRS, Université Montpellier, 34095 Montpellier, France.
Membranes (Basel). 2021 Jun 7;11(6):431. doi: 10.3390/membranes11060431.
In recent years, electrochemical methods utilizing reactive electrochemical membranes (REM) have been recognized as the most promising technologies for the removal of organic pollutants from water. In this paper, we propose a 1D convection-diffusion-reaction model concerning the transport and oxidation of oxalic acid () and oxygen evolution in the flow-through electrochemical oxidation system with REM. It allows the determination of unknown parameters of the system by treatment of experimental data and predicts the behavior of the electrolysis setup. There is a good agreement in calculated and experimental data at different transmembrane pressures and initial concentrations of . The model provides an understanding of the processes occurring in the system and gives the concentration, current density, potential, and overpotential distributions in REM. The dispersion coefficient was determined as a fitting parameter and it is in good agreement with literary data for similar REMs. It is shown that the oxygen evolution reaction plays an important role in the process even under the kinetic limit, and its contribution decreases with increasing total organic carbon flux through the REM.
近年来，利用反应性电化学膜（REM）的电化学方法已被认为是从水中去除有机污染物最具前景的技术。在本文中，我们提出了一个一维对流 - 扩散 - 反应模型，该模型涉及草酸（）在具有REM的流通式电化学氧化系统中的传输和氧化以及析氧过程。它允许通过处理实验数据来确定系统的未知参数，并预测电解装置的行为。在不同的跨膜压力和初始浓度下，计算数据与实验数据吻合良好。该模型有助于理解系统中发生的过程，并给出REM中的浓度、电流密度、电位和过电位分布。将扩散系数确定为拟合参数，它与类似REM的文献数据吻合良好。结果表明，即使在动力学极限下，析氧反应在该过程中也起着重要作用，并且其贡献随着通过REM的总有机碳通量的增加而降低。
