School of Environment, Beijing Normal University, Beijing 100875, China; School of Chemistry and Chemical Engineering, Qinghai Normal University, Xining 810008, China.
School of Environment, Beijing Normal University, Beijing 100875, China.
Sci Total Environ. 2023 Jan 20;857(Pt 1):159260. doi: 10.1016/j.scitotenv.2022.159260. Epub 2022 Oct 5.
Antibiotics are widely used and ubiquitous in the environment, which in turn poses potential threat to human health. However, the effects of agricultural activities and river input on the fate and ecological risks of antibiotics in shallow lake are still poorly understood. Surface water, overlying water and pore water, sediments and aquatic plant samples in the historical planting subarea (PA), historical aquaculture subarea (AU), inflow subarea (IW), discharge subarea (DC), and conservation subarea (CK) of Baiyangdian Lake were collected and analyzed. Our results revealed that the total antibiotic concentrations ranged from 85.33 ng/L to 1631.47 ng/L in waters and from 66.90 ng/g to 177.03 ng/g in sediments. Generally, the total antibiotic concentrations introduced by planting activity in surface water, overlying water and sediments were higher and the levels of total antibiotics in pore water were more affected by river input. In addition, three quinolones (QNs) and two tetracyclines (TCs) were dominant antibiotics in almost five subareas. The pseudo-partitioning coefficient k and bioaccumulation factor (BAF) of antibiotics varied according to the effects of river input and historical agricultural activities. The ecological risk (RQ) of antibiotics from agricultural activities was higher than that from river input. The norfloxacin (NOR) in pore water showed high RQ, which contributed to a large proportion (>50 %) of the combined ecological risks (∑RQs) except for surface water. Therefore, NOR should be used as the primary ecological risk control index for antibiotic contamination management in the BYD. ∑RQs showed high risk in water in the five subareas. This study can act as a reference for governments to formulate effective management strategies for protecting the ecological health of lakes.
抗生素在环境中被广泛应用且无处不在，这对人类健康构成了潜在威胁。然而，农业活动和河流输入对浅水湖泊中抗生素的归宿和生态风险的影响仍知之甚少。本研究采集了白洋淀历史种植区（PA）、历史养殖区（AU）、入流区（IW）、出流区（DC）和保护区（CK）的地表水、上覆水、孔隙水、沉积物和水生植物样品，并对其进行了分析。结果表明，水中抗生素总浓度范围为 85.331631.47ng/L，沉积物中抗生素总浓度范围为 66.90177.03ng/g。一般来说，种植活动引入的抗生素总量在地表水、上覆水和沉积物中较高，而孔隙水中的抗生素总量受河流输入的影响更大。此外，几乎所有五个子区域都以三种喹诺酮类（QNs）和两种四环素类（TCs）为主要抗生素。抗生素的拟分配系数 k 和生物积累因子（BAF）根据河流输入和历史农业活动的影响而变化。农业活动产生的抗生素生态风险（RQ）高于河流输入。除了地表水，孔隙水中的诺氟沙星（NOR）的 RQ 较高，对组合生态风险（∑RQs）的贡献比例较大（>50%）。因此，在对白洋淀的抗生素污染管理中，NOR 应作为抗生素污染管理的主要生态风险控制指标。∑RQs 在五个子区域的水中都显示出高风险。本研究可为政府制定保护湖泊生态健康的有效管理策略提供参考。
