Shandong Key Laboratory of Water Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Shandong University, Qingdao, 266237, China.
Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan, 250014, China.
Chemosphere. 2023 May;323:138211. doi: 10.1016/j.chemosphere.2023.138211. Epub 2023 Feb 22.
Antibiotic pollution caused by aquaculture industries is a common problem in the wetland of the Yellow River Delta (YRD). Aquatic and terrestrial food webs coexist and interact in wetlands. However, there are few comparative studies on antibiotics in these two food webs. This study investigated the occurrence, bioaccumulation, and trophic transfer of 19 antibiotics in the aquatic and terrestrial food webs of the YRD, and discussed the effects of physicochemical parameters in different food webs. The total concentrations of antibiotics in aquatic organisms and terrestrial organisms ranged from 11.61 to 63.08 ng/g dry weight (dw) and 4.21-9.11 ng/g dw, respectively. BAF (bioaccumulation factor), BSAF (biota sediment accumulation factor), and BSAF (biota soil accumulation factor) were used to explore the bioaccumulation capacity of antibiotics. The calculation results of these three factors showed that fluoroquinolones (FQs) had the highest bioaccumulation capacity. As for the trophic transfer, the total concentrations of antibiotics were biodiluted in the aquatic food web while biomagnified in the terrestrial food web. Physicochemical parameters of the antibiotics showed that log K (octanol-water partition coefficient)/log D (pH-dependent distribution coefficient) and log K (octanol-air partition coefficient) were good predictors for antibiotic bioaccumulation in the aquatic and terrestrial organisms of the YRD, respectively. In addition, the increasing log D and log K led to a rise of TMF (trophic magnification factor) in the aquatic food web while a decrease of TMF in the terrestrial food web. Overall, these results provide insights into the mechanisms on bioaccumulation and trophic transfer of antibiotics in different food webs.
水产养殖行业造成的抗生素污染是黄河三角洲（YRD）湿地的一个普遍问题。湿地中的水生和陆地食物网共存并相互作用。然而，对于这两个食物网中的抗生素，很少有比较研究。本研究调查了 YRD 水生和陆地食物网中 19 种抗生素的发生、生物积累和营养转移，并讨论了不同食物网中理化参数的影响。水生生物和陆地生物中抗生素的总浓度范围分别为 11.61-63.08ng/g 干重（dw）和 4.21-9.11ng/g dw。BAF（生物积累因子）、BSAF（生物沉积物积累因子）和 BSAF（生物土壤积累因子）用于探索抗生素的生物积累能力。这三个因素的计算结果表明，氟喹诺酮类（FQs）具有最高的生物积累能力。至于营养转移，抗生素的总浓度在水生食物网中被生物稀释，而在陆地食物网中被生物放大。抗生素的理化参数表明，log K（辛醇-水分配系数）/log D（pH 依赖性分配系数）和 log K（辛醇-空气分配系数）分别是预测 YRD 水生和陆地生物中抗生素生物积累的良好指标。此外，log D 和 log K 的增加导致水生食物网中的 TMF（营养放大因子）上升，而陆地食物网中的 TMF 下降。总体而言，这些结果提供了抗生素在不同食物网中生物积累和营养转移机制的深入了解。
