摘要
抗生素被广泛应用于治疗疾病、畜牧养殖业及病虫害防治等,然而抗生素大规模的生产及使用,对生态系统造成了持久性破坏。同时,未完全降解的抗生素在环境中逐步积累,导致抗生素抗性基因(ARGs)的富集,对环境造成极大的威胁,因此亟待开发经济、高效且可削减ARGs的抗生素处理方法。零价铁(ZVI)因廉价、易操作、不产生二次污染,被广泛用于含难降解污染物的污水处理过程,并在抗生素废水的处理中进行了广泛研究。本文从ZVI及其耦合技术对抗生素的作用机制与ZVI对厌氧消化的影响等方面,综述ZVI及耦合技术在处理抗生素废水中的应用。文章指出,ZVI主要通过产生羟基自由基(·OH)氧化降解抗生素,此外ZVI被腐蚀后形成的氢氧化物、氧化物也可吸附去除大量抗生素。零价铁-光芬顿与零价铁-电芬顿耦合工艺分别通过光能与电能促进·OH的产生,并实现Fe的循环利用。ZVI耦合厌氧生物处理过程中,ZVI可优化微生物群落,提高酶活性,从而促进厌氧消化降解抗生素,并削减部分ARGs。针对以上工艺特点,合成廉价高效的ZVI材料、探索ZVI对厌氧消化过程中ARGs的削减机制将是ZVI及其耦合技术强化抗生素废水处理的研究重点。
Antibiotics are widely used in the treatment of diseases,animal husbandry and pest control,etc.However,the large-scale production and use of antibiotics have caused lasting damage to the ecosystem.And incompletely degraded antibiotics gradually accumulated in the environment,leading to the enrichment of antibiotic resistance genes(ARGs),which will also pose a great threat to our environment.Therefore,it′s urgent to develop antibiotic treatment methods that are cost-effective and can reduce ARGs.Zero-valent iron(ZVI)has been widely used in treating wastewater containing refractory pollutants due to its advantages of low cost,easy operation and without secondary pollution.It has also been widely studied in the treatment of antibiotic wastewater.In present paper,the application of ZVI and its coupling technology in the treatment of antibiotic wastewater from the aspects of the action mechanism of ZVI and its coupling technology on antibiotics and the effect of ZVI on anaerobic digestion were summarized.The ZVI degrades antibiotics mainly by generating hydroxyl radical(·OH).In addition,hydroxides and oxides formed from ZVI can adsorb and remove a large number of antibiotics.The ZVI coupled photo-Fenton or electro-Fenton could promote the generation of·OH through light or electric energy,and realize the recycling of Fe.In the process of ZVI coupled anaerobic digestion,ZVI could promote the degradation of antibiotics and reduce some ARGs by optimizing microbial community and improving enzyme activity.In view of the characteristics of the above process,synthesizing cost-effective ZVI materials,and exploring the reduction mechanism of ARGs by ZVI in anaerobic digestion will be the focus of future researches.
作者
朱婷婷
苏仲弦
赵天杭
刘轶文
ZHU Tingting;SU Zhongxian;ZHAO Tianhang;LIU Yiwen(School of Environmental Science and Engineering,Tianjin University,Tianjin 300072,China)
出处
《化工进展》
EI
CAS
CSCD
北大核心
2022年第8期4513-4529,共17页
Chemical Industry and Engineering Progress
基金
国家自然科学基金(52000135)。
关键词
抗生素
零价铁
耦合工艺
厌氧
抗性基因
antibiotics
zero-valent iron
coupling process
anaerobic
antibiotic resistance genes
