Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China.
Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing, 210098, China; Water Conservancy Project & Civil Engineering College, Tibet Agriculture & Animal Husbandry University, Linzhi, 860000, China.
Environ Pollut. 2021 Feb 15;271:116408. doi: 10.1016/j.envpol.2020.116408. Epub 2020 Dec 30.
The increasing human presence is having an impact on plateau ecosystems, but the special environment and lack of data make it difficult to assess the real ecological risks of pharmaceutical and personal care products (PPCPs) in the river of plateau. The occurrence, distribution and trophic transfer of nineteen PPCPs were investigated in the middle and lower reaches of the Yarlung Zangbo River on the Tibetan Plateau. All the targeted PPCPs were detected in filtrated water, and seventeen PPCPs were detected in the colloid, sediment and suspended particulate matter (SPM). The distribution coefficients of colloid-infiltration water (IFW) were 1-2 orders of magnitude larger than those in the SPM-IFW, which were 1-2 orders of magnitude greater than those in the sediment-IFW. Colloids are sinks for PPCPs with up to 78.55% of the water being in the colloidal phase, in which important factors such as protein and protein-like substances are found. PPCPs in the rivers of the plateau showed high bioaccumulation ability. The fugacity-based bioaccumulation model was established and revealed that the fish in the Tibetan Plateau ingested PPCPs mainly through water instead of food and excreted them mainly through metabolism. In addition, the trophic dilution effect in the food web was observed with trophic magnification factors ranging from 0.06 to 0.22. The positive correlation between the K in the colloid-IFW and the bioaccumulation factors implied that natural colloids can not only regulate the behaviour of PPCPs in the environment, but also play an important role in bioaccumulation, which may affect the scientific nature of biological risk assessment.
人类活动的增加正在对高原生态系统产生影响，但特殊的环境和缺乏数据使得难以评估药物和个人护理产品（PPCPs）在高原河流中的实际生态风险。本研究调查了青藏高原雅鲁藏布江中下游地区 19 种 PPCPs 的赋存、分布和营养转移。所有目标 PPCPs 在滤出水中均被检出，胶体、沉积物和悬浮颗粒物（SPM）中检出 17 种 PPCPs。胶体-滤出水中（IFW）的分配系数比 SPM-IFW 大 1-2 个数量级，比沉积物-IFW 大 1-2 个数量级。胶体是 PPCPs 的汇，高达 78.55%的水处于胶体相中，其中发现了蛋白质和类蛋白质等重要物质。高原河流中的 PPCPs 具有很强的生物积累能力。建立了基于逸度的生物积累模型，揭示了青藏高原鱼类主要通过水而不是食物摄入 PPCPs，并主要通过代谢排出。此外，还观察到食物网中的营养放大效应，营养放大因子范围为 0.06-0.22。胶体-IFW 中的 K 与生物积累因子之间的正相关关系表明，天然胶体不仅可以调节 PPCPs 在环境中的行为，而且在生物积累中也起着重要作用，这可能会影响生物风险评估的科学性。
