文献类型：期刊文献

英文题名：Biochar-supported MnS nanocrystals as peroxymonosulfate activator to remove levofloxacin in water: Dominated by electron-transfer regime

作者：Wang, Xiaochong[1,2];Han, Xiaolin[3];Zhang, Wei[1,2,4];Shao, Wenli[1,2];Wang, Luo[1,2];Jia, Qilong[1,2];Zhou, Lei[1,2,4];Xiu, Guangli[1,2,4]

机构：[1]East China Univ Sci & Technol, Sch Resources & Environm Engn, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Environm Protect Key Lab Environm Stand &, Shanghai 200237, Peoples R China;[3]Shandong Second Med Univ, Sch Publ Hlth, Weifang 261053, Shandong, Peoples R China;[4]Tongji Univ, Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China

年份：2025

卷号：13

期号：2

外文期刊名：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING

收录：;EI(收录号：20251018010835);WOS:【SCI-EXPANDED(收录号:WOS:001443346300001)】；

基金：This work was supported by the Natural Science Foundation of Shanghai [No. 17ZR1407000] , and the Fundamental Research Funds for the Central Universities [No. 222201514337] .

语种：英文

外文关键词：MnS; Biochar; PMS; Electron-transfer pathway; Levofloxacin

摘要：Manganese sulfide (MnS) is considered as a highly promising material for the peroxymonosulfate (PMS) activation, but the use of MnS material alone poses obstacles in terms of metal leaching and aggregation in solution. Herein, an innovative composite material for loading MnS nanocrystals onto biochar (MnS/BC700-1) was prepared using metal organic frameworks as self-templates via a simple ligand exchange method. The biochar-MnS composites, with a 1:1 mass ratio, exhibited exceptional removal efficiency (92.1 %) for low-concentration levofloxacin (LVF, 1 mg/L) in 90 minutes, using 0.06 g/L of composites and 0.2 mM PMS. The findings from quenching experiments, ESR analysis, electrochemical tests, and the galvanic oxidation process demonstrated that the PMS activation mechanism transformed from a coupling of radical and nonradical pathways to a predominantly nonradical electron-transfer process after MnS nanocrystals were supported on biochar. MnS/ BC700-1 exhibits a significantly higher PMS utilization efficiency compared to gamma-MnS and BC700. The loading of MnS on biochar not only enhanced the electron transfer property of the composite but also prevented the loss of MnS. On the other hand, the abundant hydroxyl -OH groups on biochar also promoted the transfer of electrons. The MnS/BC700-1 material exhibited satisfactory adaptability and reusability, and the ecotoxicity of intermediates after reaction was also confirmed to be manageable by the ECOSAR method. This study provides novel perspectives on the design and development of highly efficient transition metal sulfide catalysts for environmental remediation.