Abstract
Herein,the degradation of florfenicol(FLO)over zero-valent iron(ZⅥ)enhanced by SiC was sys-tematically 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 Kobs value 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,in-creases Brunauer-Emmett-Teller(BET)surface area,and enhances FLO degradation efficiency.Further-more,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 the σ bond.This study provides new insights into the reduction hydrogenation mechanism of ZⅥ.
基金项目
Guangdong Basic and Applied Basic Research Foundation(2021A1515110954)
National Key Research and Development Projects of China(2022YEC3203302)
Guangdong Province Enterprise Science and Technology Commissioner Project(GDKTP2021048000)
National Natural Science Foundation of China(41907292)
维普
万方数据