Monitoring Bureau of Hydrology and Water Resources of Taihu Basin, Wuxi, PR China.
State Key Laboratory of Pollution Control & Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, PR China.
Sci Total Environ. 2018 Dec 1;643:12-20. doi: 10.1016/j.scitotenv.2018.06.175. Epub 2018 Jun 20.
Natural lakes play a vital role as receiving system of a cocktail of antibiotics (ABs) which have triggered a major health concern. The comparisons of ABs concentrations have been substantially implemented throughout the worldwide range. However, from lake management, the questions are not yet adequately solved: "when and where does the overall pollution level of ABs present more serious, and what AB species dominate". In this study, we detected 22 ABs in water column and sediment bottom in Taihu Lake Basin in January, April, July and October in 2017. Non-metric multi-dimensional scaling (NMDS) was applied to characterize spatiotemporal dissimilarity of ABs concentrations. Combined with a method of summed standardized concentrations, analysis of variance was applied to evaluate the overall pollution level of ABs at different sites and time periods, instead of, traditionally, a comparison of concentration. The results showed that 90% CI of Macrolides, Sulfonamides, Tetracyclines and Quinolones were 0.020-5.646, 0.040-7.887, 0.100-13.308 and 0.130-9.631 ng/L in water column, respectively; and 0.005-1.532, 0.002-0.120, 0.010-0.902 and 0.006-3.972 μg/kg in sediment, respectively. ABs concentrations approximately presented spatial homogeneity in the whole basin which included all main inflow rivers, outflow rivers and the lake body itself. Species composition was seasonally distinct and the overall pollution level was significantly lower in autumn. A critical body residue analysis showed that ABs concentrations presented a neglectable cumulative risk for fish species. This research added to the body of knowledge to develop pollution management strategies on point and non-point source loads for Taihu Lake Basin, and also the methodology provided reference for spatiotemporal characterization of dissolved pollutant in other water bodies.
天然湖泊作为抗生素（ABs）鸡尾酒的接收系统发挥着至关重要的作用，这引发了重大的健康问题。全球范围内已经对 ABs 浓度进行了大量比较。然而，从湖泊管理的角度来看，这些问题尚未得到充分解决：“ABs 的整体污染水平何时何地更严重，以及哪些 AB 物种占主导地位”。在这项研究中，我们于 2017 年 1 月、4 月、7 月和 10 月检测了太湖流域水体和底泥中的 22 种 ABs。非度量多维尺度分析（NMDS）用于描述 ABs 浓度的时空差异。结合总和标准化浓度的方法，应用方差分析评估不同地点和时间段 ABs 的整体污染水平，而不是传统上比较浓度。结果表明，90%CI 的大环内酯类、磺胺类、四环素类和喹诺酮类分别为 0.020-5.646、0.040-7.887、0.100-13.308 和 0.130-9.631ng/L 在水体中；0.005-1.532、0.002-0.120、0.010-0.902 和 0.006-3.972μg/kg 在沉积物中。ABs 浓度在整个流域内大致呈现空间均匀性，包括所有主要的入流河、出流河和湖体本身。物种组成具有季节性差异，秋季的整体污染水平显著较低。临界体残留分析表明，ABs 浓度对鱼类的累积风险可忽略不计。这项研究为制定太湖流域点源和非点源负荷的污染管理策略提供了知识储备，同时也为其他水体中溶解污染物的时空特征化提供了方法学参考。
