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

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外文摘要：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.

外文关键词：

Zero-valent ironSilicon carbideReductive dechlorinationHydrogenolysisFlorfenicol

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

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作者单位：

Dongguan University of Technology,School of Environment and Civil Engineering,Dongguan 523830,China

State Key Laboratory of Pollution Control and Resource Reuse,School of Environmental Science and Engineering,Tongji University,Shanghai 200092,China

基金：

Guangdong Basic and Applied Basic Research FoundationNational Key Research and Development Projects of ChinaGuangdong Province Enterprise Science and Technology Commissioner ProjectNational Natural Science Foundation of China

项目编号：

2021A15151109542022YEC3203302GDKTP202104800041907292

出版年：

2024

DOI：

10.1016/j.cclet.2023.109385

中国化学快报(英文版)

中国化学会

中国化学快报(英文版)

CSTPCD

影响因子：0.771

ISSN：1001-8417

年,卷(期)：2024.35(7)