锰氧化物/碳活化过硫酸盐选择性生成单线态氧降解水中氟苯尼考  

Research on the selective generation of singlet oxygen from manganese oxide/carbon activated persulfate for the degradation of florfenicol in water

作　　者：庄玲玲[1,2] 姜瑞瑾 陈斯 黄连杨 张梦露 刘常青 郑育毅[1,2] 张伟芳 ZHUANG Lingling;JIANG Ruijin;CHEN Si;HUANG Lianyang;ZHANG Menglu;LIU Changqing;ZHENG Yuyi;ZHANG Weifang(School of Environment and Resources,Fujian Normal University,Fuzhou,350007,China;Fujian University Urban Waste Resource Utilization Technology and Management Engineering Research Center,Fuzhou,350007,China)

机构地区：[1]福建师范大学环境与资源学院,福州350007 [2]福建省高校城市废物资源化技术与管理工程研究中心,福州350007

出　　处：《环境化学》2025年第2期712-720,共9页Environmental Chemistry

基　　金：国家自然科学基金(22006017);省市级项目(2024R011,2023J01291)资助.

摘　　要：为实现养殖废水中的新污染物氟苯尼考(FLO)的高效降解,本研究制备了锰氧化物/碳材料(MnO/C)用于活化过一硫酸盐(PMS)去除FLO.首先,考察了PMS用量、MnO/C用量、溶液pH值等对水中FLO去除的影响.结果表明,在PMS浓度为0.3 mmol·L^(-1)、MnO/C用量为0.2 g·L^(-1)、FLO浓度为10 mg·L^(-1),pH值为7时,15 min内降解了8.5 mg·g^(-1)(kvalue=23.83 min^(−1)·mol·L^(-1))的FLO.并通过自由基淬灭实验及电子顺磁共振测试(EPR)分析表明,MnO/C-PMS体系中主要以单线态氧(^(1)O_(2))的非自由基路径催化降解FLO,液质分析结果可知,MnO/C-PMS对FLO的降解机理主要包括脱卤和氧化.且该体系对磺胺类的磺胺甲氧嘧啶(SDM)、大环内酯类的红霉素(ERY)和喹诺酮类的氧氟沙星(OFL)等典型新污染物均具有良好的降解效果(均>83%).因此,MnO/C在活化PMS上表现出对新污染物良好的降解能力,具有潜在应用性.In order to efficiently degrade the new pollutant florfenicol(FLO)in aquaculture wastewater,this study prepared carbon-coated manganese oxide materials(MnO/C).Firstly,the effects of PMS concentration,MnO/C concentration,solution pH value on the removal of FLO were discussed,respectively.The degradation rate of FLO was 8.5 mg·g^(-1) in 15 min(kvalue=23.83 min−1·mol·L^(-1)),under the experimental conditions:FLO concentration was 10 mg·L^(-1),PMS concentration was 0.3 mmol·L^(-1),MnO/C concentration was 0.2 g·L^(-1) and pH=7.It was demonstrated by radical scavenger experiment,electron paramagnetic resonance(EPR)tests,and liquid chromatography-mass spectrometry(LC-MS)analysis.The non-radical pathways(^(1)O_(2) oxidation)dominated in the MnO/C-PMS and FLO are primarily dehalogenation and oxidized.Subsequently,The system also demonstrates effective degradation of typical emerging contaminants such as sulfamethoxypyridazine(SDM),erythromycin(ERY),and ofloxacin(OFL),with degradation rates all exceeding 83%.Therefore,MnO/C exhibits strong potential for the activation of PMS and degradation of organic pollutants,showing promising application prospects.

关 键 词：氟苯尼考 锰氧化物/碳复合材料 过一硫酸盐 非自由基路径 高级氧化 

分 类 号：X-1[环境科学与工程] O6[理学—化学]