Chem. J. Chinese Universities ›› 2024, Vol. 45 ›› Issue (10): 20240320.doi: 10.7503/cjcu20240320

• Physical Chemistry • Previous Articles     Next Articles

Preparation and Electrocatalytic Degradation Properties and Mechanism of Organic Pollutants of Solid Waste-based Aerogel Particle Electrode

LI Yun1, LI Hongyan1,2(), ZHANG Feng1, XIAO Zijun3, WANG Fang4,5, CUI Jiali1, YANG Qun1   

  1. 1.Shanxi Municipal Engineering Graduate Education Innovation Center,College of Environmental Science and Engineering,Taiyuan University of Technology,Jinzhong 030600,China
    2.Department of Architecture and Civil Engineering,Lüliang University,Lüliang 033001,China
    3.State Key Laboratory of Urban Water Resource and Environment,School of Environment,Harbin Institute of Technology,Harbin 150090,China
    4.Research Center for Edible Fungi,Biological Institute of Shanxi Province,Taiyuan 030006,China
    5.Shanxi Key Laboratory of Edible Fungi for Loess Plateau,Taigu 030801,China
  • Received:2024-06-28 Online:2024-10-10 Published:2024-09-11
  • Contact: LI Hongyan E-mail:lhy3162@126.com
  • Supported by:
    the Key Research and Development Project of Introducing High-level Scientific and Technological Talents in Lvliang, China(2021RC-1-22);the General Project of Natural Science Research of Shanxi Province, China(20220302121060);the Postgraduate Innovation Project of Shanxi Province, China(2023SJ085)

Abstract:

Waste bacteria stick(MS) and red mud(RM) were calcined to obtain powdered waste bacteria stick red mud biochar(MSRMBC). The aerogel particle electrode(MSRMBC@SA) was prepared by embedding MSRMBC with sodium alginate(SA) as the skeleton by suspension titration CaCl2 method. The electrode was characterized by scanning electron microscope(SEM), energy dispersive spectrom(EDS), fourier transform infrared spectroscopy (FTIR), X-ray diffraction(XRD), N2 adsorption-desorption(BET) and cyclic voltammetric curve(CV). The three- dimensional electrofenton system(3D-EF-MSRMBC@SA) was constructed by MSRMBC@SA. Using carbamazepine(CBZ) as the model compound, the effects of MSRMBC@SA dosage, voltage, aeration rate and pH on the electrocatalytic performance of MSRMBC@SA were investigated. Under the optimal degradation conditions, the degradation rate of CBZ(10 mg/L) was 86. 05%. Because MSRMBC@SA has good pH adjustment ability, the system is less affected by pH value. Free radical quenching, electron spin resonance(ESR) and X-ray photoelectron spectroscopy(XPS) characterization showed that · OH was the main active species, and MSRMBC@SA played a key catalytic role in the degradation of CBZ. Further studies show that MSRMBC@SA has good stability, and 3D-EF- MSRMBC@SA has lower energy consumption and better degradation effect than 2D-EF and 3D-EF-MSRMBC. MSRMBC@SA can effectively reduce the biological toxicity of CBZ solution, and has a good application prospect for the actual degradation of CBZ antibiotic wastewater.

Key words: Aerogel particle electrode(MSRMBC@SA), Advanced oxidation technology(AOPs), Carbamazepine(CBZ), Three-dimensional electrofenton system(3D-EF-MSRMBC@SA), Degradation mechanism

CLC Number: 

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