炭黑
阴极
催化作用
化学工程
粒子(生态学)
电极
降级(电信)
复合数
化学
粒径
材料科学
核化学
复合材料
有机化学
天然橡胶
海洋学
物理化学
工程类
地质学
电信
计算机科学
作者
Zekun Zhao,Yongjie Hao,Jingli Wu,Zhihai Feng,Fei Feng,Yifan Li,Qin Yang,Bo Jiang
标识
DOI:10.1016/j.seppur.2023.123960
摘要
Three-dimensionally heterogeneous electro-Fenton (3DEF) system is an energy-efficient technology for wastewater treatment, the performance of which was fundamentally dependent on the activity of filled particle electrodes toward the production of active species. In this study, the carbon black-polytetrafluoroethylene (C-PTFE) composite particles and iron-cobalt-carbon black (Fe–Co–C) composite particles were separately fabricated by one-step pyrolysis and both used as the particle electrodes in the 3DEF system for carbamazepine (CBZ) degradation. The C-PTFE particles with high hydrophobicity as cathode catalyst exhibited high H2O2 electro-generation performance. Meanwhile, the Fe3+/Fe2+ and Co3+/Co2+ redox cycles were promoted mutually in Fe–Co–C particles, which was beneficial for •OH formation and CBZ degradation. Under the optimized condition (e.g., pH = 3, current density = 10 mA cm−2), approximately 100 % of CBZ and over 80 % of COD were achieved at within 60 min. Noticeably, the synergistic performance of C-PTFE and Fe–Co–C particles in the 3DEF system exhibited little dependence on solution pH in the range of 3–9. The calculated energy consumption was as low as 0.0077 kW h g−1 COD, which was much less than those reported in many previous literatures. Chlorella growth inhibition experiments demonstrated that the toxicity of CBZ was alleviated due to the catalytic degradation of 3DEF system. Generally, the 3DEF system packed with hybrid C-PTFE and Fe–Co–C particle electrodes may be a promising technology for the wastewater treatment.
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