摘要

    这项研究的目的是分析在有或没有芦苇和曝气管的不同污泥处理湿地（STW）中营养，抗生素以及抗生素抗性基因（ARG）的消除。五种抗生素，包括土霉素，四环素，阿奇霉素，磺胺甲恶唑和磺胺嘧啶；五个ARG，包括两个四环素ARG（tetC和tetA），一个大环内酯ARG（ermB）和两个磺酰胺ARG（sul1和sul2）；在三个STW的表面和底层分别确定了一个整合酶基因（intI1）。底层抗生素的去除效率低于表层，而ARGs的去除效率却呈现相反的趋势。抗生素含量与相关的ARGs之间存在很强的相关性，并且ARGs的丰富度与intI1有很强的相关性。结果表明，所有STWs在静息期中这些污染物的含量均下降，而湿地中的芦苇和曝气管表现最好。

    The aim of this research was to analyze the elimination of nutrients, antibiotics as well as antibiotic resistance genes (ARGs) in different sludge treatment wetlands (STWs) with or without reeds and aeration tubes. Five antibiotics, including oxytetracycline, tetracycline, azithromycin, sulfamethoxazole, and sulfadiazine; five ARGs, including two tetracycline ARGs (tetC and tetA), one macrolide ARGs (ermB), and two sulfonamide ARGs (sul1 and sul2); and one integrase gene (intI1) were determined in the surface and bottom layers of three STWs, respectively. The removal efficiencies of antibiotics in the bottom layer were lower than that in the surface layer, while the elimination efficiencies of ARGs showed opposite trend. Strong correlations were observed among the contents of antibiotics as well as related ARGs, and the abundance of ARGs had a strong correlation with intI1. The results demonstrated that the contents of these pollutants decreased during the resting period in all the STWs, while the wetland had reeds and aeration tubes performed the best.

    https://www.sciencedirect.com/science/article/abs/pii/S0048969719363661