Mn-MOF derived manganese sulfide as peroxymonosulfate activator for levofloxacin degradation: An electron-transfer dominated and radical/nonradical coupling process

作     者：Xiaolin Han Wei Zhang Shuai Li Congyu Cheng Qi Yu Qilong Jia Lei Zhou Guangli Xiu Xiaolin Han;Wei Zhang;Shuai Li;Congyu Cheng;Qi Yu;Qilong Jia;Lei Zhou;Guangli Xiu

作者机构：State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical ProcessSchool of Resources and Environmental EngineeringEast China University of Science and TechnologyShanghai 200237China Shanghai Environmental Protection Key Laboratory on Environmental Standard and Risk Management of Chemical PollutantsEast China University of Science and TechnologyShanghai 200237China Shanghai Institute of Pollution Control and Ecological SecurityTongji UniversityShanghai 200092China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2023年第130卷第8期

页      面：197-211页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：supported by the Natural Science Foundation of Shanghai(No.17ZR1407000) the National Natural Science Foundation of China(No.41201302) the Fundamental Research Funds for the Central Universities(No.222201514337) 

主　　题：MnS Metal organic frameworks PMS Levofloxacin Electron-transfer pathway 

摘      要：Recently,transitionmetal sulfides have attractedmuch attention due to their better catalytic capacities as peroxymonosulfate(PMS)activator than their metal oxide ***,the systematic studies on PMS activation using transition metal sulfides are still *** this work,manganese sulfide(MnS)materials were synthesized via a MOFs-derived method and utilized for PMS activation to degrade levofloxacin(LVF)in water for the first *** expected,MnS exhibited remarkable LVF degradation efficiency by PMS activation,whichwas distinctly higher than Mn_(2)O_(3).The results of quenching experiments,electro spin resonance identification and electrochemical tests indicated that electron-transfer progress was the dominant mechanism inα-MnS/PMS ***,the presence of ^(1)O_(2) and radicals further became the removal of LVF byα-MnS/PMS system into a radical/nonradical coupling *** superior electrical conductivity ofα-MnS thanα-Mn_(2)O_(3) was revealed by DFT calculations,which resulted in the higher catalytic capacity ofα-*** result of XPS also indicated the S species in MnS accelerated the recycle of Mn(IV)/Mn(II)and then promoted the generation of ***,the influence of various environmental conditions on LVF removal and the reusability ofα-MnS were also investigated,which demonstrated the high application potential ofα-MnS/PMS ***,six possible pathways of LVF oxidation in the system were proposed based on the identified byproducts and their ecotoxicity was evaluated with ECOSAR *** work promotes the fundamental understanding of PMS activation byα-MnS and provides useful information for practical application of manganese sulfide in water treatment.