National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, State Environmental Protection Key Laboratory of Drinking Water Source Protection, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China.
Sci Rep. 2020 Mar 13;10(1):4691. doi: 10.1038/s41598-020-61651-6.
This work examined the contamination of poly- and perfluorinated compounds (PFASs) in the water and sediment of the Baiyangdian Lake. The total concentration of PFASs in the surface water varied from 140.5 to 1828.5 ng/L, and the highest concentration of PFASs were observed near the entrance of Fuhe river. The topmost contaminant was sodium perfluorohexanesulfonate (PFHxS) and perfluorooctanoic acid (PFOA) in the north and south of the Baiyangdian Lake respectively, which indicated different contamination sources. The total concentration of PFASs in the sediment varied from 0.48 to 30 ng/g, and the distribution of PFASs in the sediment was similar with that in the surface water. The concentrations of polyfluoroalkyl phosphoric diesters (diPAPs) were three to four orders of magnitude lower than those of perfluorocarboxylates (PFCAs) and PFSAs. Although the pore water and the surface water had similar ΣPFASs, the concentration of perfluorodecanoic acid (PFDA) in pore water was 1.4 to 4.4 times higher than that in surface water, and the concentration of perfluoropentanoic acid (PFPeA) in pore water was 20-70% that in surface water. The results of ecological risk assessment showed that the PFASs were currently of no immediate risk to the aquatic life.
本研究考察了白洋淀湖水和底泥中多氟和全氟化合物（PFASs）的污染情况。表层水中 PFASs 的总浓度范围为 140.5 至 1828.5ng/L，且在府河入湖口附近浓度最高。在白洋淀的北部和南部，含量最高的污染物分别为全氟己烷磺酸钠（PFHxS）和全氟辛酸（PFOA），这表明存在不同的污染来源。底泥中 PFASs 的总浓度范围为 0.48 至 30ng/g，其分布与表层水相似。多氟烷基磷酸酯（diPAPs）的浓度比全氟羧酸（PFCAs）和全氟磺酸（PFSAs）低三到四个数量级。尽管孔隙水和表层水具有相似的ΣPFASs，但孔隙水中全氟癸酸（PFDA）的浓度比表层水高 1.4 至 4.4 倍，而孔隙水中全氟戊酸（PFPeA）的浓度则是表层水的 20-70%。生态风险评估结果表明，PFASs 目前对水生生物没有直接风险。
