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Microbiological quality of roof tank water in an urban village in southeastern China

Journal of Environmental Sciences 2023年第3期125卷 148-159页

作者： Dong Hu Jie Zeng Jing Chen Wenfang Lin Xinyan Xiao Mingbao Feng Xin Yu Key Laboratory of Urban Environment and Health Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China University of Chinese Academy of Sciences Beijing 100049China Shitang Community Health Service Center Xiamen 361026China College of the Environment and Ecology Xiamen UniversityXiamen 361005China

Urban villages are unique residential neighborhoods in urban areas in China. Roof tanks are their main form of water supply, and water quality deterioration might occur in this system because of poor hygienic conditions and maintenance. In this study, water samples were seasonally collected from an urban village to investigate the influence of roof tanks as an additional water storage device on the variation in the microbial community structure and pathogenic gene markers. water stagnation in the roof tank induced significant decreases in chlorine(p tank water samples(2.14 ± 1.81 × 105gene copies/mL) than that in input water samples(3.57 ± 2.90 × 104gene copies/mL, p tanks. Terminal users might be exposed to higher microbial risk induced by high abundance of Legionella gene marker. Spearman’s rank correlation and redundancy analysis showed that residual chlorine was the driving force that promoted bacterial colonization and shaped the microbial community. It is worth noted that the sediment in the pipe will be agitated when the water supply is restored after the water outages, which can trigger an increase in turbidity and bacterial biomass. Overall, the findings provide practical suggestions for controlling microbiological health risks in roof tanks in urban villages.

关键词： Urban village water storage tank Microbiological water quality Propidium monoazide(PMA)-qPCR Illumina sequencing

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