Increase of the Risk of Antibiotic-resistant Contamination by Fine Particle Size and Deep Filtration Layers in Activated Carbon Filtration Processes
In order to investigate the risk and characterization of antibiotic-resistant contamination in activated carbon filtration systems,the experiment was set up with different filter media particle sizes,different filter layer thickness pro-cess parameters.The abundance of four antibiotic-resistant bacteria,clindamycin,sulfamethoxazole,tetracycline,and cipro-floxacin,were followed up for a period of 28 d;and microbial communities in which the distribution characteristics were correlation analyzed.The results showed that the relative abundance of all resistant bacteria in the effluent water increased by 33％,413％,202％,and 111％over the influent abundance.As the depth of the filter layer increased or the particle size of the filter media decreased,the absolute abundance and relative abundance of resistant bacteria on the filter media showed an increasing trend,while the total number of microbial species and the diversity of the community gradually decreased.Redundancy analysis revealed that the abundance of sulfonamide-resistant bacteria was correlated with Proteo-bacteria;the abundance of tetracycline-,ciprofloxacin-,and clindamycin-resistant antibiotics was correlated with Cyanobac-teria and Firmicutes.
activated carbonfilter sizefilter thicknessantibiotic resistant bacteriamicrobial community
万方数据
维普
