摘要

       作为一种新兴的污染物，抗生素耐药基因（ARGs）已成为人们关注的热点。本研究旨在探讨珠江三角洲地区水源水、饮用水处理厂及自来水中ARGs的发生、多样性及细菌群落组成的变化。不同类型的水体中存在不同的arg。在27个目标ARGs中，floR和sul1主要来自该地区三条大河的水源水。Pearson相关分析表明sul1、sul2、floR和cmlA可能是水样中ARGs的潜在指标。自来水中总的精氨酸含量远低于水源水。饮用水处理厂砂滤沉淀法能有效去除ARGs，而颗粒活性炭过滤法能提高ARGs的丰度。研究发现，假单胞菌可能参与了ARGs在饮用水处理系统中的增殖和传播。自来水经处理后，细菌和精氨酸仍然存在，尽管它们显著减少。优化水处理工艺去除ARG还需要进一步的研究。

        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 studied 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://linkinghub.elsevier.com/retrieve/pii/S0048-9697(17)33036-X