农业环境科学学报2025，Vol.44Issue(3)：675-684,10.DOI:10.11654/jaes.2024-1144
非水相体系有机酸对水钠锰矿界面氟喹诺酮类抗生素降解的影响机制
Mechanisms of the effect of organic acids in non-aqueous systems on the degradation of fluoroquinolone antibiotics at the birnessite interface
摘要
Abstract
To investigate the photodegradation mechanism of fluoroquinolone antibiotics(fluoroquinolones,FQs)in non-aqueous systems,the effects of soil-active mineral birnessite and organic acids secreted by plant roots were studied.Birnessite and oxalate-loaded birnessite were synthesized and subjected to photodegradation experiments of non-aqueous FQs under varying oxalate loadings and moisture conditions.The results showed that as the oxalate loading on birnessite increased,its oxidation degree decreased,with the surface oxygen vacancy/surface lattice oxygen(Oads/Oaltt)ratio rising from 0.215 to 0.272-0.394.The band gap of birnessite decreased from 1.80 eV to 1.62-1.64 eV.Photodegradation experiments demonstrated that norfloxacin underwent significant photodegradation in birnessite with different oxalate loadings.The degradation rate constant increased with the oxalate loading,from 0.042 min-1 to 0.152 min-1.Similarly,the degradation rate constant also increased with moisture content,from 0.029 min-1 to 0.109 min-1.Comparative studies of different FQs structures(norfloxacin,ciprofloxacin,enrofloxacin)showed distinct degradation rates,influenced by molecular activity,and the promoting effect of oxalate-loaded birnessite varied accordingly.The results suggest that oxalate loading reduces the oxidation degree of birnessite,enhances the photocatalytic effect,and facilitates the formation of more reactive species,thereby promoting the photodegradation of norfloxacin at the birnessite interface.关键词
水钠锰矿/有机酸/氟喹诺酮类抗生素/非水相/光降解Key words
birnessite/organic acid/fluoroquinolone antibiotics(FQs)/no-naqueous/photodegradation分类
资源环境引用本文复制引用
田芹,李代微,程鹏飞,秦好丽,刘同旭..非水相体系有机酸对水钠锰矿界面氟喹诺酮类抗生素降解的影响机制[J].农业环境科学学报,2025,44(3):675-684,10.基金项目
国家自然科学基金项目(42407028,41967003) （42407028,41967003）
地下水资源与环境教育部重点实验室开放课题资助(202406ZDKF11) （202406ZDKF11）
中国博士后基金面上项目(2024M760597) （2024M760597）
广东省基础与应用基础研究重大项目(2023B0303000006) （2023B0303000006）
广东省科技计划项目(2023B1212060044) National Natural Science Foundation of China(42407028,41967003) （2023B1212060044）
The Open Project Program of Key Laboratory of Groundwater Resources and Environment(Jilin University),Ministry of Education(202406ZDKF11) （Jilin University）
China Postdoctoral Science Foundation(2024M760597) （2024M760597）
Guangdong Major Project of Basic and Applied Basic Research(2023B0303000006) （2023B0303000006）
Guangdong Foundation for Program of Scinece and Technology Research(2023B1212060044) （2023B1212060044）
