Science of the Total Environment, Volume 616-617, March 2018,
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.
Actinobacteria; Activated Carbon; Activated Carbon Treatment; Anti-Bacterial Agents; Antibiotic Resistance; Antibiotic Resistance Genes; Antibiotics; Antiinfective Agent; Article; Bacteria; Bacteria (microorganisms); Bacterial Gene; Bacterium; Bacterium Detection; Bacteroidetes; Biochemical Composition; China; Classification; CmlA Gene; Community Composition; Controlled Study; Correlation Methods; Drinking Water; Drinking Water Sources; Drug Resistance, Microbial; Filtration; FloR Gene; Gene; Gene Dissemination; Gene Proliferation; Genes; Genes, Bacterial; Genetic Parameters; Genetic Variability; Genetics; Granular Activated Carbon Filtration; Guangdong; Microbial Community; Microbiology; Nonhuman; Pearl River Delta Region; Pearson Correlation Analysis; Potable Water; Priority Journal; Proteobacteria; Pseudomonas; Sedimentation; Species Composition; Sul1 Gene; Sul2 Gene; Tap Water; Treatment; Waste Water Management; Waste Water Treatment Plant; Water Filtration; Water Management; Water Purification; Water Sampling; Water Treatment; Water Treatment Plant; Water Treatment Plants; Water Treatment Process; Zhujiang Delta; Asia