State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China.
State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China; Advanced Interdisciplinary Institute of Environment and Ecology, Beijing Normal University, Zhuhai 519087, China.
J Hazard Mater. 2023 Oct 5;459:132301. doi: 10.1016/j.jhazmat.2023.132301. Epub 2023 Aug 15.
Antibiotics have gained increasing attention as pharmaceuticals widely existing in human society. Under low temperature conditions, antibiotics tend to have higher environmental persistence, which poses a potential threat to ecological environment, but research on antibiotics in low-temperature basins is still lacking. Therefore, for investigating occurrence, spatio-temporal distributions, and ecological risks of antibiotics in a seasonal freeze-thaw basin, rivers in Tumen River basin were selected and sampled, including 25 samples during the river-freezing season and 27 samples during the non-freezing season. Overall, climate characteristics of different latitudes and renewal frequency of antibiotics are important factors that lead to diversity of antibiotics in basins. Eleven target antibiotics were detected and their average concentrations during the river-freezing season (0.83-27.5 ng L) were lower than that during the non-freezing season (2.80-45.30 ng L), severely impacted by river flow, ice sealed-melting, and local feeding practices. In addition, total antibiotic concentrations are usually highest in downstream areas of human settlements, receiving input from husbandry and sewage, respectively. Through ecological risk assessment, norfloxacin and amoxicillin posed high risks to algae, which were identified as high-risk pollutants in basin.
抗生素作为广泛存在于人类社会中的药品而受到越来越多的关注。在低温条件下，抗生素往往具有更高的环境持久性，这对生态环境构成了潜在威胁，但低温盆地中抗生素的研究仍然缺乏。因此，为了调查季节性冻融盆地中抗生素的发生、时空分布和生态风险，选择并采样了图们江流域的河流，包括河流冻结期的 25 个样本和非冻结期的 27 个样本。总的来说，不同纬度的气候特征和抗生素的更新频率是导致盆地中抗生素多样性的重要因素。检测到 11 种目标抗生素，其在河流冻结期（0.83-27.5ng/L）的平均浓度低于非冻结期（2.80-45.30ng/L），严重受到河流流量、冰封融化和当地饲养习惯的影响。此外，总抗生素浓度通常在人类住区下游地区最高，分别接收畜牧业和污水的输入。通过生态风险评估，诺氟沙星和阿莫西林对藻类构成了高风险，它们被确定为盆地中的高风险污染物。
