Degradation of perfluorooctanoic acid by inductively heated Fenton-like process over the Fe_(3)O_(4)/MIL-101 composite  

作　　者：Xun Zhu Chenchen Zhang Yingying Li Yin Lu Na Huang Dawei Wang 

机构地区：[1]Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education,College of Environment,Hohai University,Nanjing 210098,China [2]Lower Changjiang River Bureau of Hydrological and Water Resources Survey,Bureau of Hydrology,Changjiang Water Resources Commission,Nanjing 210000,China [3]Graduate School,Nanjing University of Information Science&Technology,Nanjing 210000,China

出　　处：《Chinese Chemical Letters》2024年第12期340-343,共4页中国化学快报（英文版）

基　　金：financial support from the National Key Research and Development Program of China(No.2022YFC3205300);National Natural Science Foundation of China(Nos.52100178 and 52370072)。

摘　　要：To efficiently remove perfluorooctanoic acid(PFOA),we developed a composite of magnetic Fe_(3)O_(4)nanocrystals and MIL-101(an iron-based metal organic framework).Because of its high surface area,porous structure,and complexation between PFOA as confirmed by experimental results and density functional theory simulation,the magnetic composite showed a Langmuir adsorption capacity of 415 mg/g in the presence of various groundwater components,and thus adsorbed PFOA at environment-relevant concentration within 20 min.The catalyst loaded with PFOA can then be magnetically separated from the synthetic groundwater.This adsorption step concentrated PFOA near MIL-101 and resulted in a fast decomposition rate in the decomposition step,where MIL-101 served as an efficient Fenton agent due to its abundant Fe^(3+)/Fe^(2+)sites.Meanwhile,the alternative magnetic field was introduced to change the production pathway of reactive oxygen species and superoxide radical anions were produced,which was critical for PFOA degradation.In addition,the inductive heating effect heat the magnetic particles to445 K through an in-situ approach,which thus further accelerated Fenton reactions rate.In addition,and achieved a complete degradation of PFOA within 30 min.This newly developed Fenton catalyst demonstrates advantages over conventionally heterogeneous and homogeneous catalysts,and thus is promising for practical applications.

关 键 词：Metal organic framework Poly-and perfluoroalkyl substances Fenton reactions Inductive heat Magnetic nanoparticles 

分 类 号：O647.3[理学—物理化学] O643.36[理学—化学] X703[环境科学与工程—环境工程]