South China Sea Bio-Resource Exploitation and Utilization Collaborative Innovation Center, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China; State Key Laboratory of Organic Geochemistry, CAS Centre for Pearl River Delta Environmental Pollution and Control Research, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
State Key Laboratory of Organic Geochemistry, CAS Centre for Pearl River Delta Environmental Pollution and Control Research, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
Sci Total Environ. 2018 Mar;616-617:453-461. doi: 10.1016/j.scitotenv.2017.10.318. Epub 2017 Nov 9.
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.
作为新兴污染物，抗生素耐药基因（ARGs）已成为公众关注的焦点。本研究旨在调查中国南方珠江三角洲地区水源水、饮用水处理厂和自来水中 ARGs 的发生和多样性，以及细菌群落组成的变化。不同类型的水中存在着各种 ARGs。在所检测的 27 种目标 ARGs 中， floR 和 sul1 在该地区三条大河的水源水中占主导地位。皮尔逊相关性分析表明，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 ARGs 的总丰度远低于水源水。饮用水处理厂中的砂滤和沉淀可以有效去除 ARGs；相比之下，颗粒活性炭过滤会增加 ARGs 的丰度。研究发现，假单胞菌可能参与了所研究饮用水处理系统中 ARGs 的增殖和传播。尽管经过处理后，自来水中仍存在细菌和 ARGs，但它们的数量明显减少。需要进一步研究以优化去除 ARG 的水处理工艺。
