State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China.
State Key Laboratory of Environment-friendly Energy Materials, School of Materials Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, PR China.
Chemosphere. 2019 Jun;224:707-715. doi: 10.1016/j.chemosphere.2019.02.195. Epub 2019 Mar 3.
In this work, dimensionally stable Ti/SnO-RuO electrode is successfully prepared using thermal decomposition method for the electrocatalytic degradation of high-concentration industrial gallic acid (GA) effluent in detail. The surface morphology, crystal structure and element analysis of as-prepared Ti/SnO-RuO electrode are characterized by scanning electron microscopy, X-ray diffraction and X-ray fluorescence spectrometer, respectively. In addition, cyclic voltammetry, polarization curve and accelerated life tests are exploited to investigate the electrocatalytic activity and stability of Ti/SnO-RuO electrode. Orthogonal experiment shows that, among the factors (current density, temperature and initial pH), current density is pivotal parameter influencing the degradation efficiency of industrial GA effluent. COD removal and degradation efficiencies of GA effluent reach up to 76.9% and 80.1% after 6 h, respectively, at the optimal conditions (current density of 10 mA cm, pH 6 and 35 °C). The degradation of GA effluent follows pseudo-first-order reaction kinetics. This work provides an in-depth theoretical support and application of electrocatalytic technology to the treatment of high-concentration industrial GA effluent.
在这项工作中，通过热分解法成功制备了尺寸稳定的 Ti/SnO-RuO 电极，用于详细电催化降解高浓度工业没食子酸（GA）废水。通过扫描电子显微镜、X 射线衍射和 X 射线荧光光谱仪分别对所制备的 Ti/SnO-RuO 电极的表面形貌、晶体结构和元素分析进行了表征。此外，还利用循环伏安法、极化曲线和加速寿命试验研究了 Ti/SnO-RuO 电极的电催化活性和稳定性。正交实验表明，在电流密度、温度和初始 pH 等因素中，电流密度是影响工业 GA 废水降解效率的关键参数。在最优条件（电流密度为 10 mA cm、pH 为 6 和 35°C）下，GA 废水的 COD 去除率和降解效率分别达到 76.9%和 80.1%。GA 废水的降解符合准一级反应动力学。这项工作为电催化技术处理高浓度工业 GA 废水提供了深入的理论支持和应用。
