表面次生氧化矿物对FeS_(2)降解抗生素的影响及作用机制  

Role of surface secondary mineral on tylosin degradation mediated by the pyrite oxidation process

作　　者：舒小华[1,2,3] 覃紫其 聂昌达 周进文 张腾飞 张倩[4] SHU Xiao-hua;QIN Zi-qi;NIE Chang-da;ZHOU Jin-wen;ZHANG Teng-fei;ZHANG Qian(College of Environmental Science and Engineering,Guilin University of Technology,Guilin 541006,China;The Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control,Guilin University of Technology,Guilin 541006,China;Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area,Guilin University of Technology,Guilin 541006,China;School of Life and Environmental Science,Guilin University of Electronic Technology,Guilin 541004,China)

机构地区：[1]桂林理工大学环境科学与工程学院,广西桂林541006 [2]桂林理工大学,广西环境污染控制理论与技术重点实验室,广西桂林541006 [3]桂林理工大学,广西岩溶地区水污染控制与用水安全保障协同创新中心,广西桂林541006 [4]桂林电子科技大学生命与环境科学学院,广西桂林541004

出　　处：《中国环境科学》2024年第10期5539-5546,共8页China Environmental Science

基　　金：国家自然科学基金资助项目(U21A20179);广西自然科学基金资助项目(2023GXNSFAA026373,2018GXNSFBA281097)。

摘　　要：以广泛应用于畜牧业的大环内酯类抗生素泰乐菌素(TYL)为研究对象,探究了不同氧化腐蚀程度的黄铁矿对TYL的光降解性能和作用机制.结果表明,氧化后的黄铁矿能够显著提高其对TYL的光降解效率.具体来说,氧化后的黄铁矿样品表面粗糙度增加,比表面积扩大,增加了表面反应活性位点,从而提高了其对TYL的吸附能力.此外,氧化增强了黄铁矿表面的电子传递过程,加快了·OH产生速率,进而提高了对TYL的光降解效率.同时,黄铁矿(FeS_(2))与表面新生成的Fe_(2)O_(3)组成了异质结,有效抑制了材料内部光生电子与空穴的复合,从而进一步提高了光降解性能.This study investigated the photodegradation performance and mechanisms of pyrite,with varying degrees of oxidation,on the macrolide antibiotic tylosin(TYL),which is extensively used in animal husbandry.The results indicated that oxidized pyrite significantly enhanced its photocatalytic degradation efficiency towards TYL.The surface roughness of the oxidized pyrite samples increased,leading to a larger specific surface area and a greater number of active sites for surface reactions,which improved the adsorption capacity for TYL.Moreover,the surface electron transfer process of oxidized pyrite was significantly enhanced,which accelerated the production rate of hydroxyl radicals(·OH)and improved the photodegradation efficiency of TYL.Additionally,the interaction between pyrite(FeS_(2))and the newly formed Fe_(2)O_(3) on the surface created a heterojunction that effectively inhibited the recombination of photogenerated electrons and holes within the material,thereby augmenting the photodegradation performance.

关 键 词：黄铁矿(FeS2) 氧化腐蚀 光降解效果 泰乐菌素(TYL) 次生矿物 

分 类 号：X505[环境科学与工程—环境工程]