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Invited Review

Review on electrochemical degradation of phenolic compounds

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  • Received: 15 October 2020Revised: 12 December 2020Accepted: 15 December 2020Available online: 16 December 2020
  • Phenolic compounds are widely present in domestic sewage and industrial sewage and have serious environmental hazards. The electrochemical oxidation (EO) is demonstrated to be one of the most promising methods for the degradation of sewage due to its advantages of high efficiency, environmental compatibility, and safety. In this work, we present an in-depth overview of the mechanism and the factors affecting the degradation of phenolic compounds by EO. In particular, the effects of treating phenolic compounds with different anode materials are discussed in detail. It is found that the non-active anode shows higher degradation efficiency, less intermediate accumulation, and lower energy consumption than the active anode. EO combined other treatment methods (biological, photo, Fenton, etc.) present some advantages, such as low energy consumption and high degradation rate. Meanwhile, the remaining drawbacks of the electrochemical oxidation process as the phenolic compound treatment system have been discussed. Furthermore, to improve the feasibility of the practical application of EO technology, some future research directions are put forward.
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Review on electrochemical degradation of phenolic compounds

  • Corresponding authors:

    Hong-yang Wang    E-mail: wanghongyang_why@126.com

    Xin-mei Hou    E-mail: houxinmeiustb@ustb.edu.cn

  • 1. Beijing Advanced Innovation Center for Materials Genome Engineering, Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing. Beijing 100083, China
  • 2. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
  • 3. State Environmental Protection Key Laboratory of Environmental Planning and Policy Simulation, Chinese Academy of Environmental Planning, Beijing 100012, China
  • 4. School of Materials Science Engineering, Zhengzhou University, Zhengzhou 450001, China

Abstract: Phenolic compounds are widely present in domestic sewage and industrial sewage and have serious environmental hazards. The electrochemical oxidation (EO) is demonstrated to be one of the most promising methods for the degradation of sewage due to its advantages of high efficiency, environmental compatibility, and safety. In this work, we present an in-depth overview of the mechanism and the factors affecting the degradation of phenolic compounds by EO. In particular, the effects of treating phenolic compounds with different anode materials are discussed in detail. It is found that the non-active anode shows higher degradation efficiency, less intermediate accumulation, and lower energy consumption than the active anode. EO combined other treatment methods (biological, photo, Fenton, etc.) present some advantages, such as low energy consumption and high degradation rate. Meanwhile, the remaining drawbacks of the electrochemical oxidation process as the phenolic compound treatment system have been discussed. Furthermore, to improve the feasibility of the practical application of EO technology, some future research directions are put forward.

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