Degradation of florfenicol in a flow-through electro-Fenton system enhanced by wood-derived block carbon(WBC)cathode  

作　　者：Li Tian Qiongfang Zhuo Jincheng Lu Jingjing Liu Xiaofeng Xu Xiaolin You Manman Xu Bo Yang Junfeng Niu 

机构地区：[1]School of Environment and Civil Engineering,Dongguan University of Technology,Dongguan 523808,China [2]College of Chemistry and Environmental Engineering,Shenzhen University,Shenzhen 518060,China [3]Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology(Sun Yat-sen University),Guangzhou 510275,China

出　　处：《Chinese Chemical Letters》2022年第11期4740-4745,共6页中国化学快报（英文版）

基　　金：supported by the National Science Fund for Distinguished Young Scholars(No.51625801);Major Science and Technology Program for Water Pollution Control and Treatment in China(No.2017ZX07202-001-007);Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme(2017);Guangdong Provincial Science and Technology Project(No.2017A020216014);the National Natural Science Foundation of China(No.21777106);Pearl River S&T Nova Program of Guangzhou,China(No.201710010065);Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology(No.2020B1212060022)。

摘　　要：The flow-through electro-Fenton(EF-T)reactor with WBC cathode was designed to remove florfenicol(FF).The activated WBC cathode was prepared by facile carbonization and activation methods,and featured high specific surface area,natural multi-channel structure,abundant oxygen-containing groups,good hydrophilicity,and excellent O_(2)reducing capacity.WBC cathode was located above Ti/Ru-IrO_(2)mesh anode.O_(2)evolved at the anode was carried to the inner wall of channel of WBC by the force of buoyancy and water flow,which increases oxygen source of H_(2)O_(2)generation at the cathode.The flow-through system by using WBC electrode promote the mass transfer of O_(2)and FF.The production amount of H_(2)O_(2)at activated WBC was 32.2 mg/L,which was almost twice as much as that at non-activated WBC(15.0 mg/L).FF removal ratio in EF-T system was 98%,which was much higher than that of traditional flow-by electro-Fenton(EF-B,33%)or single electrooxidation system(EO,16%).EF-T system has the lowest energy consumption(4.367 kWh/kg)among the three electrochemical systems.The cathodic adsorption,anodic electrooxidation,and EF reaction are responsible for the degradation of FF.After five consecutive cycle experiments,FF removal ratio was still 98%,indicating WBC has the good stability.

关 键 词：Wood-derived block carbon Natural multi-channel structure Flow-through mode Electro-fenton Anodic oxygen 

分 类 号：X505[环境科学与工程—环境工程]