Spatiotemporal distribution, sources and ecological risks of perfluorinated compounds (PFCs) in the Guanlan River from the rapidly urbanizing areas of Shenzhen, China
Spatiotemporal distribution, sources and ecological risks of perfluorinated compounds (PFCs) in the Guanlan River from the rapidly urbanizing areas of Shenzhen, China
复制标题
深圳快速城市化地区观澜河全氟化合物(PFCs)时空分布、来源及生态风险
DOI：
10.1016/j.chemosphere.2019.125637
复制
发表时间：
2020
期刊：
影响因子：
8.8
通讯作者：
Xu Nan
中科院分区：
文献类型：
--
作者：
Wu Jiang;Junaid Muhammad;Wang Zhifen;Sun Weiling;Xu Nan
有限的研究表明，流经快速城市化地区的河流中的全氟化合物（PFCs）的环境问题。因此，本研究旨在探讨深圳观澜河地表水样品中PFCs的时空分布、主要来源及其生态风险。枯水期∑ PFCs浓度范围为11.3~384 ng/L，平均值为81.8 ng/L;丰水期∑ PFCs浓度范围为6.90~619 ng/L，平均值为339 ng/L。检测到的主要化合物是短链全氟化学品，如全氟己烷磺酸盐（PFHxS）和全氟丁烷磺酸盐（PFBS）。此外，时空分布显示，PFCs的水平显着较高的雨季比旱季，并在支流比那些在主流中的水平相对较高。源解析法强调工业排放、生活污水、降水和污水处理厂是PFCs的主要来源。此外，人口密度和相关的城市污水排放量作为PFCs在该地区分布不均匀的重要指标。生态风险评价结果表明，全氟十四烷酸（PFTA，C14）对观澜河水生生物（特别是糠虾）具有较高的生态风险。本研究不仅揭示了快速城市化流域PFCs污染特征，而且为快速城市化地区城市河流生态环境保护提供了基准数据。
Limited studies have demonstrated the environmental concerns of perfluorinated compounds (PFCs) in the rivers flowing through the rapidly urbanizing areas. Therefore, this study aims to investigate the spatial and temporal distribution, major sources and ecological risks of PFCs in the surface water samples, collecting from the Guanlan River, Shenzhen, China. The concentrations of ∑PFCs ranged from 11.3 to 384 ng/L, with a mean value of 81.8 ng/L in the dry season, and ranged from 6.90 to 619 ng/L, with a mean value of 339 ng/L in the wet season. Short-chain PFCs such as perfluorohexane sulfonate (PFHxS) and perfluorobutane sulfonate (PFBS) were detected as the predominant compounds. Further, the spatiotemporal distribution revealed significantly higher levels of PFCs in the wet season than those in the dry season, and relatively higher levels in the tributaries than those in the mainstream. Source apportionment highlighted the industrial discharges, domestic wastewater, precipitation, and wastewater treatment plants as the major sources of PFCs. Moreover, the population density and associated urban sewage emissions observed as important indicators for PFCs uneven distribution in the area. The ecological risk assessment revealed perfluorotetradecanoic acid (PFTA, C14) posed high ecological risks to the aquatic organisms (especially for mysid) in the Guanlan River. Taken all together, this study not only unveiled the characteristics of PFCs contamination in the rapidly urbanizing catchment, but also provided the baseline data for policy makers to protect the ecological environment of the urban rivers in the rapidly growing area.