The Environmental Research Institute, MOE Key Laboratory of Environmental Theoretical Chemistry, South China Normal University, Guangzhou, 510006, China.
Department of Science and Environmental Studies, The Education University of Hong Kong, Tai Po, N.T., Hong Kong Special Administrative, Region, China.
Environ Pollut. 2019 Jun;249:894-903. doi: 10.1016/j.envpol.2019.03.111. Epub 2019 Mar 30.
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.
混合设计和人工曝气已广泛应用于湿地，但对于它们在去除抗生素和抗生素抗性基因（ARGs）方面的有效性知之甚少。在这里，我们研究了不同规模的人工曝气和混合设计的中观尺度人工湿地（CWs）在去除抗生素和 ARGs 方面的性能，这些人工湿地处理的是含有抗生素的家庭污水。我们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，以实现不同的人工曝气设计。总抗生素的水相去除效率在 87.4%至 95.3%之间，而总 ARGs 的去除效率在 87.8%至 99.1%之间。CWs 对抗生素的去除主要归因于微生物的降解作用。本研究表明，基质的吸附和生物过程可能是去除 ARGs 的两个主要机制。本研究结果表明，人工曝气的混合 CWs 可以提高抗生素和 ARGs 以及常规污染物的处理效率。
