摘要
抗生素广泛应用于医药和养殖行业,排入水体中的抗生素严重威胁了生态安全和人体健康.目前,常规污水处理过程对抗生素降解效率较低,基于硫酸根自由基(SO^(·−)_(4))的高级氧化技术逐渐成为水处理领域的研究热点之一.铁基材料廉价易得,在活化过硫酸盐(PS)降解水中抗生素领域展现出一定的应用前景.本文重点综述了几种典型铁基材料在活化PS降解水中抗生素的研究进展,分析了pH、重复使用性等影响铁基材料实际处理效果的因素,并对铁基材料活化PS的发展前景进行了展望,旨在为拓展铁基材料环境应用和阐明PS活化机制提供重要参考.结果表明:铁(氢)氧化物、零价铁(ZVI)和铁硫化物等铁基材料活化PS产生的SO^(·−)_(4)和羟基自由基(HO·)对抗生素降解起关键作用.与传统铁基材料相比,复合型铁基材料表现出更加优异的催化性能和稳定性.此外,高价铁和单线态氧也被证明对铁基体系催化降解抗生素起重要作用.现阶段缺乏考察铁基材料/PS体系降解实际水体中抗生素性能和机理的研究;同时,单原子铁催化剂等新型铁基材料活化PS降解抗生素的性能及机制也有待进一步明确.
The use and discharge of antibiotics into water bodies by the pharmaceutical and aquaculture industries without prior treatment seriously threaten human health and ecological safety.In view of this,the sulfate radical-based advanced oxidation process has gradually become one of the most promising research fields in contrast to the conventional sewage treatment process that has lower degradation efficiency of antibiotics in water.Iron-based materials show outstanding features in the field of activated persulfate(PS)for the degradation of antibiotics because they are cheap and easy to operate.This review hence focuses on the research progress of several typical iron-based materials in activating PS to degrade antibiotics in water and analyzes the factors such as pH and reusability that affect the actual treatment effect of iron-based materials.Finally,the development of iron-based materials for PS activation are prospected,aiming at providing an important reference for expanding the environmental application of iron-based materials and elucidating the activation mechanism of PS.It is found that the sulfate radical(SO^(·−)_(4))and hydroxyl radical(HO·)produced by the activation of PS by heterogeneous iron-based materials such as iron(hydr)oxides,zero-valent iron(ZVI)and iron sulfides play a vital role in the degradation of antibiotics.Compared with traditional heterogeneous iron-based materials,the composite iron-based materials show a better catalytic performance and stability.In addition,the high-valent iron and singlet oxygen also play an important role in the degradation of antibiotics in iron-based systems.At present,there is a lack of research on the performance and mechanism of degradation of antibiotics in practical water by iron-based materials/PS system.Moreover,the performance and mechanism of novel iron-based materials such as single-atom iron catalysts to activate PS to degrade antibiotics also need to be further clarified.
作者
凌良雄
陆建
周易
周彦波
LING Liangxiong;LU Jian;ZHOU Yi;ZHOU Yanbo(School of Resources and Environmental Engineering,East China University of Science and Technology,Shanghai 200237,China)
出处
《环境科学研究》
CAS
CSCD
北大核心
2022年第1期290-298,共9页
Research of Environmental Sciences
基金
国家自然科学基金项目(No.51778230,21906056)
上海市优秀技术带头人项目(No.20XD1433900)。
关键词
铁基材料
过硫酸盐
抗生素
活化
降解
iron-based materials
persulfate
antibiotics
activation
degradation
