Dimensionally stable Ti/SnO2-RuO2 composite electrode based highly efficient electrocatalytic degradation of industrial gallic acid effluent. (June 2019)

• Record Type: Journal Article
• Authors: Zhang, Ying; He, Ping; Jia, Lingpu; Zhang, Tinghong; Liu, Huanhuan; Wang, Shuai; Li, Caixia; Dong, Faqin; Zhou, Shiping
• Is Part Of: Chemosphere. Volume 224(2019)
• Page Start: 707
• Page End: 715
• Publication Date: 2019-06
• Subjects: Industrial gallic acid effluent -- Ti/SnO2-RuO2 electrode -- Electrocatalytic degradation -- Pseudo-first-order reaction kinetics -- Energy consumption; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2019.02.195
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: In this work, dimensionally stable Ti/SnO2 -RuO2 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/SnO2 -RuO2 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/SnO2 -RuO2 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 −2, 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. Graphical abstract: Image 1 Highlights: Dimensionally stable Ti/SnO2 -RuO2 anode is prepared by thermal decomposition method. Ti/SnO2 -RuO2 anode exhibits higher oxygen evolution potential and better stability. High-concentration industrial GA effluent is efficiently treated by Ti/SnO2 -RuO2 anode. COD removal and degradation efficiencies of GA effluent reach to 76.9% and 80.1%.