Enhanced degradation of florfenicol by microscale SiC/Fe:Dechlorination via hydrogenolysis  

作　　者：Yun-Fei Zhang Chun-Hui Zhang Jian-Hui Xu Lei Li Dan Li Jin-Hong Fan Jiale Gao Xin Quan Qi Wu Yue Zou Yan-Ling Liu 

机构地区：[1]Dongguan University of Technology,School of Environment and Civil Engineering,Dongguan 523830,China [2]State Key Laboratory of Pollution Control and Resource Reuse,School of Environmental Science and Engineering,Tongji University,Shanghai 200092,China

出　　处：《Chinese Chemical Letters》2024年第7期218-221,共4页中国化学快报（英文版）

基　　金：financially supported by the Guangdong Basic and Applied Basic Research Foundation(No.2021A1515110954);National Key Research and Development Projects of China(No.2022YEC3203302);Guangdong Province Enterprise Science and Technology Commissioner Project(No.GDKTP2021048000);National Natural Science Foundation of China(No.41907292)。

摘　　要：Herein,the degradation of florfenicol(FLO)over zero-valent iron(ZVI)enhanced by SiC was systematically investigated.It was found that 5 g/L of ZVI/SiC(1:3)at pH 3.0 could completely degrade 20 mg/L of FLO within 1 h,with a Kobsvalue of 0.0873 min^(-1),12.5 times greater than that of pure ZVI(0.0069 min^(-1)).Vibrating sample magnetometer(VSM)characterizations revealed that the use of SiC supporter reduces the magnetic intensity of ZVI,which mitigates iron particle agglomeration,increases Brunauer-Emmett-Teller(BET)surface area,and enhances FLO degradation efficiency.Furthermore,ZVI/SiC exhibits a much lower hydrogen evolution potential(HEP)and significantly higher corrosion currents compared to pure ZVI.FLO was proposed to undergo degradation via reductive dechlorination,involving a hydrogenolysis mechanism that entails the cleavage of theσbond.This study provides new insights into the reduction hydrogenation mechanism of ZVI.

关 键 词：Zero-valent iron Silicon carbide Reductive dechlorination HYDROGENOLYSIS FLORFENICOL 

分 类 号：TQ138.11[化学工程—无机化工] TQ163.4[环境科学与工程—环境工程] X703