Occurrence and partition of perfluorinated compounds in water and sediment from Liao River and Taihu Lake, China.
Occurrence and partition of perfluorinated compounds in water and sediment from Liao River and Taihu Lake, China.
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DOI：
10.1016/j.chemosphere.2011.02.075
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发表时间：
2011-04
期刊：
影响因子：
8.8
通讯作者：
Liping Yang;Lingyan Zhu;Zhengtao Liu
中科院分区：
文献类型：
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作者：
Liping Yang;Lingyan Zhu;Zhengtao Liu
测定了辽河和太湖水体及沉积物中4种全氟磺酸（PFSAs）和10种全氟羧酸（PFCAs）的浓度。在太湖水样中，PFOA和PFOS是检出最多的全氟化合物；辽河中PFC以PFHxS居多，PFOA次之，PFOS仅在2个样品中检出。这表明这两个地区使用了不同的PFC产品。这两个流域的全氟辛烷磺酸和全氟辛烷磺酸水平与日本河流相似，但明显低于五大湖。沉积物中全氟辛烷磺酸和长链全氟辛烷磺酸的贡献均远高于水样，说明这两种全氟辛烷磺酸在沉积物中的优先分配。同一沉积物中全氟辛烷磺酸和全氟辛酸的浓度比多环芳烃低3个数量级。PFHxS、PFOS和PFOA的平均沉积物-水分配系数（logKoc）分别为2.16、2.88和2.28。
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 (logKoc) of PFHxS, PFOS and PFOA were determined to be 2.16, 2.88 and 2.28 respectively.