摘要

       混合设计和人工曝气已广泛应用于湿地，但对其去除抗生素和抗生素抗性基因 (ARG) 的有效性知之甚少。在这里，我们研究了具有人工曝气和混合设计的各种中宇宙尺度人工湿地 (CW) 在从添加抗生素的生活污水中去除抗生素和 ARG 的性能。建立了四个以沸石为基质、以鸢尾为植物的混合人工湿地系统，以具有不同的人工曝气设计。总抗生素的水去除效率从 87.4% 到 95.3% 不等，而总 ARGs 的去除效率从 87.8% 到 99.1% 不等。 CWs 大量去除抗生素主要归因于微生物降解。本研究表明底物的吸附和生物过程可能是 ARGs 消除的两个主要机制。这项研究的结果表明，带有人工曝气的混合 CW 可以提高抗生素和 ARGs 以及常规污染物的处理效率。

       Hybrid design and artificial aeration has been widely applied in wetlands, but little is known about their effectiveness in the removal of antibiotics and antibiotic resistance genes (ARGs). Here we investigated the performance of various mesocosm-scale constructed wetlands (CWs) with artificial aeration and hybrid design in removal of antibiotics and ARGs from antibiotics-spiked domestic sewage. Four hybrid constructed wetland systems with zeolite as substrate and Iris tectorum Maxim as plant were set up to have different artificial aeration designs. The aqueous removal efficiencies of total antibiotics ranged from 87.4% to 95.3%, while those of total ARGs varied from 87.8% to 99.1%. The mass removal of antibiotics by the CWs was attributed mainly to the microbial degradation. The present study imply that sorption of substrates and biological processes could be the two main mechanisms for ARGs elimination. The results from this study showed the hybrid CWs with artificial aeration could enhance treatment efficiencies of antibiotics and ARGs as well as conventional pollutants.

https://www.sciencedirect.com/science/article/abs/pii/S0269749118356203