State Key Laboratory of Estuarine and Coastal Research, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, China.
Environ Pollut. 2013 Apr;175:22-9. doi: 10.1016/j.envpol.2012.12.008. Epub 2013 Jan 10.
The occurrence and distribution of five groups of antibiotics were investigated in the surface water of Yangtze Estuary over four seasons. Of the 20 antibiotics, only sulfamerazine was not detected at all sampling sites, indicating widespread occurrence of antibiotic residues in the study area. Detection frequencies and concentrations of antibiotics were generally higher in January, indicating that low flow conditions and low temperature might enhance the persistence of antibiotics in water. Antibiotic levels varied with location, with the highest concentrations being observed around river discharge and sewage outfall. Furthermore, a positive correlation between total antibiotic and DOC concentrations revealed the significant role played by DOC. Risk assessment based on single compound exposure showed that sulfapyridine and sulfamethoxazole could cause medium risk to daphnid in the Yangtze Estuary.
调查了长江口四季地表水五种抗生素的发生和分布情况。在所研究的区域，20 种抗生素中，只有磺胺甲恶唑在所有采样点都没有被检测到，这表明抗生素残留广泛存在。抗生素的检出频率和浓度在 1 月份普遍较高，这表明低流量条件和低温可能会增强抗生素在水中的持久性。抗生素水平随位置而异，在河流排放口和污水排放口附近观察到的浓度最高。此外，总抗生素和 DOC 浓度之间的正相关表明了 DOC 的重要作用。基于单一化合物暴露的风险评估表明，在长江口，磺胺吡啶和磺胺甲恶唑可能对水蚤造成中等风险。
