文献类型：期刊文献

英文题名：Nitrogen-doped iron carbide composites for activating peroxymonosulfate to degrade sulfonamides

作者：Lu, Qinwei[1];Lu, Jian[1,2];Zhou, Yi[1];Zhou, Yanbo[1,3,4]

机构：[1]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China;[2]Tongji Univ, Coll Environm Sci & Engn, State Key Lab Pollut Control & Resource Reuse, Key Lab Yangtze Water Environm, Shanghai 200092, Peoples R China;[3]Jinggangshan Univ, Sch Life Sci, Jian 343009, Peoples R China;[4]State Key Lab Coal Liquificat Gasificat & Utilizat, Shanghai 200237, Peoples R China

年份：2025

卷号：358

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;EI(收录号：20244617355782);WOS:【SCI-EXPANDED(收录号:WOS:001357141300001)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant No. 52370168)

语种：英文

外文关键词：Derived carbon; Advanced oxidation; Nitrogen doping; Metal dissolution; Electron shuttle

摘要：Advanced oxidation technology based on persulfate can efficiently remove trace pollutants in water, but there are problems with poor electronic cycling efficiency and metal leaching. In this work, we successfully fabricated in-situ nitrogen doped biochar composite material Fe3C/C by chelating Fe2+ ions with chitosan and carbonizing the precursor. The main active component of Fe3C/C was Fe3C, and nitrogen doping and biochar structure promoted the cycling of Fe2+/Fe3+. The catalyst Fe3C/C exhibits excellent synergistic "adsorption-oxidation" ability, and the removal efficiency of sulfonamide (SA) can reach 80 % (k = 0.1793 min-1). The degradation kinetics, free radical chemistry, and characterization were combined to investigate the synergistic effect of Fe3C and carbon substrate on the generation of persistent free radicals. Fe3C/C is not only an electron donor, but also an electron acceptor and electron transfer carrier. In the Fe3C/C/PMS system, free radical and non-free radical pathways coexist, which makes it suitable for the treatment of various pollutants in complex water matrices. The contribution of defects and pyrrole nitrogen constitutes the synergistic degradation process of free and non-free radicals. In addition, Fe3C/C-3 showed good continuous processing ability and less iron dissolution in the packed column experiment. This work provides theoretical support and technical means for the efficient removal of trace pollutants in water by biochar-based advanced oxidation technology.