School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China; School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China; Key Laboratory of Nanominerals and Pollution Control of Anhui Higher Education Institutes, Hefei University of Technology, Hefei 230009, China.
School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China; Key Laboratory of Nanominerals and Pollution Control of Anhui Higher Education Institutes, Hefei University of Technology, Hefei 230009, China.
Sci Total Environ. 2020 May 10;716:137060. doi: 10.1016/j.scitotenv.2020.137060. Epub 2020 Feb 1.
Drinking water reservoir is threatened globally due to anthropogenic contamination and thus in need of more attention. Here, we comprehensively investigated the occurrence, distribution and risk assessment of representative antibiotics in a large drinking water reservoir (Fengshuba Reservoir, China). The total concentrations of antibiotics in the water phase, porewater phase, sediment phase and soil phase (drawdown area) were in the ranges of 195-569 ng/L, 47.1-333 ng/L, 114-272 μg/kg and 2.84-77.2 μg/kg, respectively. The dominant antibiotic was CIP in both the water and porewater phases, while it was OTC in the sediment phase. For the water phase, seasonal factor consisting hydrologic condition and pattern of antibiotic use could influence the occurrence level and environmental fate of antibiotics. In contrast, exogenous particles derived from the soils that had used manures during the spring planting season coupled with heavy rainfall was responsible for the occurrence level and composition of antibiotics in the sediment phase. Moreover, Chl-α, NO, TP and EC were the most dominant factor influencing the antibiotic distributions in the water phase, porewater phase, sediment phase and soil phase, respectively. Pseudo-partitioning coefficients indicated that PENV and PENG might accumulate more easily into the sediments from the aqueous phase compared with other antibiotics. Risk assessments suggested that TC might pose high risks to the aquatic ecosystem, but the antibiotics presented no risk to the health of consumers. Generally, TC could be used as a promising indicator for evaluating the occurrence and potential risk of antibiotics in Fengshuba Reservoir.
饮用水水库因人为污染而受到全球威胁，因此需要更多关注。在这里，我们全面调查了一个大型饮用水水库（中国枫树坝水库）中代表性抗生素的发生、分布和风险评估。水相、孔隙水相、沉积物相和土壤相（退水区）中抗生素的总浓度分别在 195-569ng/L、47.1-333ng/L、114-272μg/kg 和 2.84-77.2μg/kg 的范围内。水相和孔隙水相中主要的抗生素是 CIP，而沉积物相中主要的抗生素是 OTC。对于水相，由水文条件和抗生素使用模式组成的季节性因素会影响抗生素的发生水平和环境归宿。相比之下，春季种植季节来自使用过粪便的土壤的外源颗粒与强降雨一起，导致了沉积物中抗生素的发生水平和组成。此外，Chl-α、NO、TP 和 EC 是分别影响水相、孔隙水相、沉积物相和土壤相中抗生素分布的最主要因素。伪分配系数表明，与其他抗生素相比，PENV 和 PENG 可能更容易从水相向沉积物中积累。风险评估表明，TC 可能对水生生态系统构成高风险，但抗生素对消费者的健康没有风险。总的来说，TC 可以用作评估枫树坝水库中抗生素发生和潜在风险的有前途的指标。
