中国辽河流域和太湖流域水中和沉积物中全氟化合物的分布与赋存。
Occurrence and partition of perfluorinated compounds in water and sediment from Liao River and Taihu Lake, China.
机构信息
College of Environmental Science and Engineering, Key Laboratory of Pollution Processes and Environmental Criteria, Ministry of Education, Nankai University, Tianjin 300071, China.
出版信息
Chemosphere. 2011 Apr;83(6):806-14. doi: 10.1016/j.chemosphere.2011.02.075. Epub 2011 Mar 23.
The concentrations of four perfluorinated sulfonate acids (PFSAs) and 10 perfluorinated carboxylate acids (PFCAs) were measured in water and sediment samples from Liao River and Taihu Lake, China. In the water samples from Taihu Lake, PFOA and PFOS were the most detected perfluorinated compounds (PFCs); in Liao River, PFHxS was the predominant PFC followed by PFOA, while PFOS was only detected in two of the samples. This suggests that different PFC products are used in the two regions. PFOS and PFOA in both watersheds are at similar level as in the rivers of Japan, but significantly lower than in Great Lakes. The contributions of PFOS and long chain PFCAs in sediments were much higher than in water samples of both watersheds, indicating preferential partition of these PFCs in sediment. The concentrations of PFOS and PFOA were three orders of magnitude of lower than that of polycyclic aromatic hydrocarbons in the same sediments. The average sediment-water partition coefficients (log K(oc)) of PFHxS, PFOS and PFOA were determined to be 2.16, 2.88 and 2.28 respectively.
在中国辽河流域和太湖流域的水体和沉积物样本中，测定了四种全氟磺酸（PFSAs）和十种全氟羧酸（PFCAs）的浓度。在太湖的水体样本中，全氟辛烷磺酸（PFOS）和全氟辛酸（PFOA）是最常检测到的全氟化合物（PFCs）；在辽河流域，PFHxS 是主要的 PFC，其次是 PFOA，而 PFOS 仅在两个样本中检测到。这表明这两个地区使用的全氟化合物产品不同。两个流域的 PFOS 和 PFOA 水平与日本河流中的水平相当，但明显低于五大湖。PFOS 和长链 PFCAs 在沉积物中的贡献远高于两个流域的水体样本，表明这些 PFCs 优先分配到沉积物中。PFOS 和 PFOA 的浓度比同一样本中多环芳烃的浓度低三个数量级。测定了 PFHxS、PFOS 和 PFOA 的平均沉积物-水分配系数（log K(oc)）分别为 2.16、2.88 和 2.28。
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