沸石基质一体化垂直流人工湿地去除猪废水中抗生素及抗生素抗性基因的性能。
Removal performance of antibiotics and antibiotic resistance genes in swine wastewater by integrated vertical-flow constructed wetlands with zeolite substrate.
机构信息
College of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, PR China; State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China; College of Environmental Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, PR China.
College of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, PR China; State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, PR China.
出版信息
Sci Total Environ. 2020 Jun 15;721:137765. doi: 10.1016/j.scitotenv.2020.137765. Epub 2020 Mar 5.
Antibiotics and antibiotic resistance genes (ARGs) in swine wastewater have an irreversible impact on the surrounding water and soil ecosystems. Herein, integrated vertical-flow constructed wetlands (IVCWs) were constructed to assess the effects of zeolite and plants on the removal of sulfonamides (SMs), tetracyclines (TCs), and related ARGs (tetW, tetO, tetM, sul I, sul II, and sul III) from digested swine wastewater. The microorganism community structure was also investigated. Results showed that IVCWs with a zeolite substrate and plant system (ZP) exhibited a favorable removal performance for N, antibiotics, and ARGs at 97.9%, 95.0%, and 95.1%, respectively. Moreover, zeolite systems showed higher adsorption of SMs, lower adsorption of TCs. The higher removal rate of antibiotics in ZP systems might be due to the enhanced microbial degradation with the enrichment of Pseudomonas, Acinetobacter, and Bacillus in zeolite. Furthermore, Arundo donax had limited impact on antibiotics removal and was not conducive to the removal of ARGs. The absolute abundances of sul(I), sul(II), sul(III), tet(M), and tet(O) were significantly positively correlated with the absolute abundance of 16S rDNA. However, no significant correlation was found between the concentration of antibiotics and the abundance of related ARGs in the effluent.
抗生素和抗生素抗性基因（ARGs）在养猪废水中对周围的水和土壤生态系统具有不可逆转的影响。本文构建了组合垂直流人工湿地（IVCWs），以评估沸石和植物对从消化猪废水中去除磺胺类药物（SMs）、四环素（TCs）和相关 ARGs（tetW、tetO、tetM、sul I、sul II 和 sul III）的影响。还研究了微生物群落结构。结果表明，沸石基质和植物系统（ZP）的 IVCWs 对 N、抗生素和 ARGs 的去除率分别为 97.9%、95.0%和 95.1%。此外，沸石系统对 SMs 的吸附能力更高，对 TCs 的吸附能力更低。ZP 系统中抗生素去除率较高可能是由于假单胞菌、不动杆菌和芽孢杆菌在沸石中的富集增强了微生物降解作用。此外，芦竹对抗生素去除的影响有限，不利于 ARGs 的去除。sul(I)、sul(II)、sul(III)、tet(M)和 tet(O)的绝对丰度与 16S rDNA 的绝对丰度呈显著正相关。然而，在出水的抗生素浓度与相关 ARGs 的丰度之间未发现显著相关性。
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