摘要

作为新兴污染物，抗生素抗性基因（ARG）已成为公众关注的焦点。本研究旨在调查珠江三角洲地区ARGs的发生和多样性，以及源水，饮用水处理厂和自来水中细菌群落组成的变化。不同类型的水中存在各种ARG。在27个目标ARG中，floR和sul1在该地区三条大河的源水中占主导地位。 Pearson相关分析表明，sul1，sul2，floR和cmlA可能是水样中ARGs的潜在指标。自来水中检测到的ARG的总丰度远低于源水中的总丰度。饮用水处理厂的砂滤和沉淀可有效去除ARG;相比之下，颗粒活性炭过滤增加了ARG的丰度。结果发现，假单胞菌可能参与了研究饮用水处理系统中ARG的增殖和传播。处理后细菌和ARG仍然存在于自来水中，尽管它们显着减少。需要更多的研究来优化ARG去除的水处理过程。

As emerging contaminants, antibiotic resistance genes (ARGs) have become a public concern. This study aimed to investigate the occurrence and diversity of ARGs, and variation in the composition of bacterial communities in source water, drinking water treatment plants, and tap water in the Pearl River Delta region, South China. Various ARGs were present in the different types of water. Among the 27 target ARGs, floR and sul1 dominated in source water from three large rivers in the region. Pearson correlation analysis suggested that sul1, sul2, floR, and cmlA could be potential indicators for ARGs in water samples. The total abundance of the detected ARGs in tap water was much lower than that in source water. Sand filtration and sedimentation in drinking water treatment plants could effectively remove ARGs; in contrast, granular activated carbon filtration increased the abundance of ARGs. It was found that Pseudomonas may be involved in the proliferation and dissemination of ARGs in the stud-ied drinking water treatment system. Bacteria and ARGs were still present in tap water after treatment, though they were significantly reduced. More research is needed to optimize the water treatment process for ARG removal.

https://www.sciencedirect.com/science/article/pii/S004896971733036X#ab0005