Shi Yali, Pan Yuanyuan, Wang Jieming, Cai Yaqi
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, PO Box 2871, Beijing 100085, China.
J Environ Monit. 2012 Feb;14(2):636-42. doi: 10.1039/c1em10772k. Epub 2011 Dec 23.
The distribution of perfluorinated compounds (PFCs) in Baiyangdian Lake, China, was determined in this study. Perfluorooctanoic acid (PFOA) was the dominant PFC in lake water (1.70-73.5 ng L(-1), median 9.72 ng L(-1)), while perfluorooctane sulfonate (PFOS) was the dominant PFC in sediments (0.06-0.64 ng g(-1) dry wt, median 0.19 ng g(-1) dry wt) and in aquatic animals (0.57-13.7 ng g(-1) wet wt, median 2.56 ng g(-1) wet wt). Significant differences in PFC levels were observed among various aquatic animals. We also determined, for the first time, the PFC levels in floating plants, including Ceratophyllum demersum L., Hydrocharis dubia (Bl.) Backer and Salvinia natans (L.), and we found that PFOA and PFNA were the dominant PFCs in these plants. Furthermore, floating plants were observed to have different composition profiles compared to aquatic animals. Geographical differences in PFC levels were also observed, with higher PFC levels in samples from the north part of Baiyangdian Lake than those in the south. The differences in human and industrial activities in different parts of the lake and the discharged wastewater from the Fuhe River may be the major contributors for these geographical differences.
本研究测定了中国白洋淀中全氟化合物（PFCs）的分布情况。全氟辛酸（PFOA）是湖水中的主要全氟化合物（1.70 - 73.5 ng L⁻¹，中位数为9.72 ng L⁻¹），而全氟辛烷磺酸（PFOS）是沉积物（0.06 - 0.64 ng g⁻¹干重，中位数为0.19 ng g⁻¹干重）和水生动物（0.57 - 13.7 ng g⁻¹湿重，中位数为2.56 ng g⁻¹湿重）中的主要全氟化合物。在各种水生动物中观察到全氟化合物水平存在显著差异。我们还首次测定了漂浮植物中的全氟化合物水平，这些漂浮植物包括金鱼藻、水鳖和槐叶萍，我们发现全氟辛酸和全氟壬酸是这些植物中的主要全氟化合物。此外，与水生动物相比，观察到漂浮植物具有不同的组成特征。还观察到全氟化合物水平存在地理差异，白洋淀北部样本中的全氟化合物水平高于南部。湖泊不同区域人类和工业活动的差异以及府河排放的废水可能是造成这些地理差异的主要原因。
