期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 527, 期 -, 页码 56-64出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2015.04.091
关键词
Antibiotics; Surface water; Groundwater; Seasonal variation; Vertical infiltration; Jianghan Plain
资金
- National Natural Science Foundation of China [41103063, 41120124003, 40830748]
- Science Foundation of Central Colleges [CUGL100217, CUG120406]
25 antibiotics (macrolides, tetracyclines, fluoroquinolones and sulfonamides) were detected in swine wastewater, river water, rivulet water and in groundwater samples from multi-level monitoring boreholes (with sampling ports, respectively, at 10, 25 and 50 m below the land surface) at Jianghan Plain, central China. Except swine wastewater, the antibiotic concentrations in groundwater, river and rivulet water were higher in spring than those in winter. Nineteen antibiotics were detected at 100% frequencies in all kinds of water samples. In groundwater, fluoroquinolones and tetracyclines were the predominant antibiotics and the total concentrations of 25 antibiotics commonly decreased with the aquifer depth. Most groundwater samples collected in spring had high concentrations of norfloxacin, with average values of 65.27 ng.L-1, 37.28 ng.L-1 and 46.83 ng.L-1, respectively, at 10, 25 and 50 m deep boreholes. By contrast, the concentrations of sulfamethazine and erythromycin were rather low in groundwater, but high in surface water. Groundwater samples collected from sites close to rivers or rivulets had much higher contents of antibiotics than those from other sites, indicating that the dominant source of antibiotics in groundwater should be the contaminated rivers or rivulets, rather than the scattered pig and poultry farms in the study area. (C) 2015 Elsevier B.V. All rights reserved.
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