Citation: 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. Enhanced degradation of florfenicol by microscale SiC/Fe: Dechlorination via hydrogenolysis[J]. Chinese Chemical Letters, ;2024, 35(7): 109385. doi: 10.1016/j.cclet.2023.109385 shu

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

Yun-Fei Zhang ^{a, b, 1} ,
Chun-Hui Zhang ^{a, 1} ,
Jian-Hui Xu ^a ,
Lei Li ^{a, *,} ,
Dan Li ^a ,
Jin-Hong Fan ^{b, *,} ,
Jiale Gao ^a ,
Xin Quan ^a ,
Qi Wu ^a ,
Yue Zou ^a ,
Yan-Ling Liu ^a

a.
Dongguan University of Technology, School of Environment and Civil Engineering, Dongguan 523830, China
b.
State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China

lileidgut@163.com

jinhongfan@tongji.edu.cn

Received Date: 10 June 2023
Revised Date: 10 November 2023
Accepted Date: 5 December 2023
Available Online: 11 December 2023

Figures(5)

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 K_obs 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, 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 the σ bond. This study provides new insights into the reduction hydrogenation mechanism of ZVI.
- Zero-valent iron,
- Silicon carbide,
- Reductive dechlorination,
- Hydrogenolysis,
- Florfenicol
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