Revisiting the contribution of Fe^(Ⅳ)O^(2+)in Fe(Ⅱ)/peroxydisulfate system  

作　　者：Kunjie Hou Peng Shen Zhu Wang Zhoujie Pi Fei Chen Xiaoming Li Haoran Dong Qi Yang 

机构地区：[1]College of Environmental Science and Engineering,Hunan University,Changsha 410082,China [2]Ministry of Education,Key Laboratory of Environmental Biology and Pollution Control(Hunan University),Changsha 410082,China [3]Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment,Ministry of Education,College of Environment and Ecology,Chongqing University,Chongqing 400045,China

出　　处：《Chinese Chemical Letters》2023年第3期181-185,共5页中国化学快报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.51779088,51908528);the Fundamental Research Funds for the Central Universities(No.2021CDJQY-014);the Natural Science Foundation of Hunan Province,China(No.2021JJ30126)。

摘　　要：Recent studies have proposed that the high-valent iron species(such as Fe^(Ⅳ)O^(2+))rather than sulfate radical(SO_(4)^(·-))and hydroxyl radical(·OH)are the main reactive oxidant species(ROS)in Fe(Ⅱ)/peroxydisulfate(PDS)system with the methyl phenyl sulfoxide(PMSO)as the Fe^(Ⅳ)O^(2+)probe.However,many operational factors may interfere with the accuracy of this method,so the contribution of Fe^(Ⅳ)O^(2+)calculated by this method is controversial.In this study,the possible effect of Fe(Ⅱ)concentration,pollutant type,reducing agent,or coexisted anions on Fe^(Ⅳ)O^(2+)production and its corresponding contribution to the removal of target pollutants in the Fe(Ⅱ)/PDS system were investigated in detail,and the intrinsic mechanisms involved were also explored.This study shows that ROS generation is a complex process in the Fe(Ⅱ)/PDS system,and multiple combinatorial approaches are urgently required to deeply explore the contribution of ROS to the elimination of target contaminants.

关 键 词：Methyl phenyl sulfoxide Fe(Ⅱ)/PDS system Reactive oxidative species Fe^(Ⅳ)O^(2+) Probe 

分 类 号：X703[环境科学与工程—环境工程]