Electro-catalytic activity of CeO_(x) modified graphite felt for carbamazepine degradation via E-peroxone process  

作　　者：Xinyu Wang Ye Jin Weirui Chen Ruini Zou Jinxin Xie Yiming Tang Xukai Li Laisheng Li 

机构地区：[1]School of Environment,South China Normal University,Guangzhou 510006,China [2]Key Laboratory of Theoretical Chemistry of Environment,Ministry of Education,Guangzhou 510006,China [3]Guangdong Provincial Engineering Technology Research Center for Drinking Water Safety,Guangzhou 510006,China [4]Guangdong Provincial Key Laboratory of Functional Materials for Environmental Protection,Guangzhou 510006,China

出　　处：《Frontiers of Environmental Science & Engineering》2021年第6期331-340,共10页环境科学与工程前沿（英文）

基　　金：funded by the National Natural Science Foundation(No.51978288);Natural Science Foundation of Guangdong Province(No.2019A1515012202);Major Science and Technology Program for Water Pollution Control and Treatment in China(No.2017ZX07202-004).

摘　　要：E-peroxone(EP)was one of the most attractive AOPs for removing refractory organic compounds from water,but the high energy consumption for in situ generating H_(2)O_(2) and its low reaction efficiency for activating O_(3) under acidic conditions made the obstacles for its practical application.In this study,cerium oxide was loaded on the surface of graphite felt(GF)by the hydrothermal method to construct the efficient electrode(CeO_(x)/GF)for mineralizing carbamazepine(CBZ)via EP process.CeO_(x)/GF was an efficient cathode,which led to 69.4%TOC removal in CeO_(x)/GF-EP process with current intensity of 10 mA in 60 min.Moreover,CeO_(x)/GF had the flexible application in the pH range from 5.0 to 9.0,TOC removal had no obvious decline with decrease of pH.Comparative characterizations showed that CeO_(x)could enhance surface hydrophilicity and reduce the charge-transfer resistance of GF.About 5.4 mg/L H_(2)O_(2) generated in CeO_(x)/GF-EP process,which was 2.1 times as that in GF-EP process.The greater ozone utility was also found in CeO_(x)/GF-EP process.More O_(3) was activated into hydroxyl radicals,which accounted for the mineralization of CBZ.An interfacial electron transfer process was revealed,which involved the function of oxygen vacancies and Ce^(3+)/Ce^(4+)redox cycle.CeO_(x)/GF had the good recycling property in fifth times'use.

关 键 词：E-peroxone CeO_(x) Graphite felt CARBAMAZEPINE MINERALIZATION 

分 类 号：O643.3[理学—物理化学]