Synthesis of Ce/BiFeO_(3)composites and activation of persulfate for pharmaceutical wastewater degradation  

作　　者：Yanting Zuo Shi Cheng Ziwen Guo Haolin Liu Huaicheng Zhang Ji Wu Ziwu Fan Wentao Li Aimin Li 

机构地区：[1]Key Laboratory of Taihu Basin Water Resources Management,Ministry of Water Resources,Nanjing Hydraulic Research Institute,Nanjing 210029,China [2]School of Urban Construction,Changzhou University,Changzhou 213164,China [3]School of Resources and Environmental Engineering,Jiangsu University of Technology,Changzhou 213001,China [4]State Key Laboratory of Pollution Control and Resources Reuse,School of the Environment,Nanjing University,Nanjing 210023,China [5]School of Environment and Safety Engineering,Nanjing Polytechnic Institute,Nanjing 210048,China

出　　处：《Journal of Rare Earths》2025年第3期462-469,I0002,共9页稀土学报(英文版)

基　　金：Project supported by the National Key Research and Development Program(2022YFC3204900);Jiangsu Province Construction System Technology Project(2023ZD108)。

摘　　要：Sulfamethoxazole(SMZ)is a prevalent and recalcitrant micropollutant in water,posing a significant threat to both aquatic organisms and human health.Therefore,investigating the removal of SMZ is of critical importance.In order to investigate the effect of rare earth metal doping on the performance of activated persulfate oxidative degradation of SMZ,BiFeO_(3)with different Ce doping amounts was successfully prepared by a hydrothermal method.Then,it was characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),scanning transmission electro n microscopy(STEM)and Brunauer-Emmett-Teller(BET)method.The performance of porous Ce/BiFeO_(3)in the catalytic activation of persulfate(PMS)for the degradation of SMZ in water was investigated using SMZ solution as a simulated wastewater.The impact of Ce doping rate,catalyst dosage,temperature variations,common anions,natural organic matter,and PMS concentration on SMZ removal was systematically evaluated.The characterization results show that the octahedral rhombic structure of Ce can be observed on the surface of this doped catalyst,and Ce doping does not change the crystalline shape of Ce/BiFeO_(3).The specific surface area of the doped catalyst increases,accompanied by an enlargement of pore size,thereby enhancing the catalyst's adsorption capacity and resistance to contamination by SMZ.Under the optimal conditions of 25℃,SMZ concentration of 20 mg/L,0.8 g/L PMS and 0.3 g/L 0.05Ce/BiFeO_(3)catalyst,the removal rate of SMZ reaches approximately 95%within35 min of reaction time.Even after five cycles of reuse,the degradation rate of SMZ remains above 88%,demonstrating the catalyst's good stability and reusability.Bursting experiments show that SO_(4)^(·-),·OH,1O_(2)and O_(2)^(·-)are involved in the catalytic degradation process,with 1O_(2)playing a dominant role.

关 键 词：Ce/BiFeO_(3) PERSULFATE SULFAMETHOXAZOLE Sulfate radicals Rare earths 

分 类 号：X703[环境科学与工程—环境工程]