人工湿地抗生素与重金属的去除及其环境影响

Removal of antibiotics and heavy metals in constructed wetlands and their environmental impacts

随着水环境中污染物的日益增多,风险物质的控制受到广泛关注,抗生素与重金属作为重要的风险污染物,其单独与交互作用都对水环境产生了严重影响。人工湿地以其经济、简单和易控制等优点成为目前普遍采用的污水深度处理技术,但现阶段的研究主要集中于单一污染物的去除,对共存污染的作用机制及处理效果研究较少。文章综述了人工湿地对抗生素与重金属的去除原理及两者共存时产生的环境影响,主要是靠基质、植物与微生物之间的协同作用得以去除;由抗生素的存在导致的耐药性在重金属的作用下加速了蔓延,而抗生素同时又会促进植物对重金属的吸收,以期为两者共存污染的治理及风险控制给予一些参考。

With the increasing number of pollutants in the water environment,the control of risk substances has been widely concerned.Antibiotics and heavy metals,as the important risk pollutants,have a serious impact on the water environment.Constructed wetland has become a widely used advanced wastewater treatment technology because of its advantages of economy,simplicity and easy control.However,the research at present mainly focuses on the removal of one single pollutant,and the research on the mechanism and treatment effect of coexisting pollutions is less.This paper summarized the removal principle of antibiotics and heavy metals in the constructed wetland and the environmental impact when they coexisted,which mainly depended on the synergistic effect among substrate,plants and microorganisms.The drug resistance caused by the existence of antibiotics accelerated the spread under the action of heavy metals,and antibiotics can promote the absorption of heavy metals by plants at the same time.This paper aims to provide a reference for the co-existence of antibiotics and heavy metals governance and risk control.