Enteromorpha-derived Fe/N-rich carbon for efficient degradation of thiacloprid via catalytic ozonation
文献类型： 外文期刊
作者： Xuan, Fengxu 1 ; Li, Yang 1 ; Zhang, Shizhen 1 ; Yang, Lufang 2 ; Lv, Fujian 3 ; Wang, Mingxi 4 ; Li, Xuanke 1 ; Wu, Ling 1 ;
作者机构： 1.Wuhan Univ Sci & Technol, Sch Chem & Chem Engn, Hubei Prov Key Lab Coal Convers & New Carbon Mat, Wuhan 430081, Peoples R China
2.Sichuan Acad Agr Sci, Inst Agr Resources & Environm, Chengdu 610066, Peoples R China
3.Qujing Normal Univ, Coll Chem & Environm Sci, Qujing 655400, Peoples R China
4.Wuhan Inst Technol, Sch Chem & Environm Engn, Wuhan 430205, Peoples R China
关键词： Enteromorpha; Fe/N-rich carbon; Catalytic ozonation; Thiacloprid; Reaction mechanism
期刊名称：SEPARATION AND PURIFICATION TECHNOLOGY （ 影响因子：9.0； 五年影响因子：8.5 ）
ISSN： 1383-5866
年卷期： 2025 年 371 卷
页码：
收录情况： SCI
摘要： Heterogeneous catalytic ozonation (HCO) has emerged as a promising advanced oxidation process for eliminating persistent organic pollutants (POPs) from wastewater. However, the development of efficient, costeffective and environmentally benign catalysts remains a critical challenge. Leveraging the inherent heteroatoms in waste biomass, Fe/N-rich carbon (EP-T) catalyst was herein developed via a facile one-step pyrolysis of Enteromorpha, thereby obviating the addition of any external iron and nitrogen sources. The resulting EP-800 demonstrated impressive catalytic performance in HCO, achieving complete degradation of thiacloprid (THIA, a typical POP) within 50 min. Remarkably, the first-order rate constant (kobs) of EP-800/O3 was about 15 times higher than that of ozonation alone. Through comprehensive characterization and mechanistic studies, graphitic N and Fe species were identified as the primary active sites, in which center dot OH, center dot O2- and 1O2 were produced in the HCO system, collectively facilitating the degradation of THIA into less toxic intermediates. This work not only establishes a sustainable paradigm for resourceful utilization of waste biomass but also provides fundamental insights into the HCO mechanisms of biomass-derived carbonaceous catalysts.
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