Occurrence and partitioning behavior of per- and polyfluoroalkyl substances (PFASs) in water and sediment from the Jiulong Estuary-Xiamen Bay, China

全氟辛酸 河口 沉积物 海湾 环境化学 环境科学 旱季 盐度 全氟辛烷 化学 水文学(农业) 海洋学 生态学 磺酸盐 地质学 生物 古生物学 有机化学 岩土工程
作者
Siquan Wang,Liya Ma,Can Chen,Yongyu Li,Yuling Wu,Yihao Liu,Zhiyuan Dou,Eriko Yamazaki,Nobuyoshi Yamashita,Bin‐Le Lin,Xinhong Wang
出处
期刊:Chemosphere [Elsevier BV]
卷期号:238: 124578-124578 被引量:68
标识
DOI:10.1016/j.chemosphere.2019.124578
摘要

Twenty-four per- and polyfluoroalkyl substances (PFASs) were analyzed in water and sediment from the Jiulong Estuary-Xiamen Bay to study their seasonal variations, transport, partitioning behavior and ecological risks. The total concentration of PFASs in water ranged from 11 to 98 ng L−1 (average 45 ng L−1) during the dry season, 0.19–5.7 ng L−1 (average 1.5 ng L−1) during the wet season, and 3.0–5.4 ng g−1 dw (average 3.9 ng g−1 dw) in sediment. In water samples, short-chain PFASs were dominated by perfluorooctanoic acid (PFBA) in the dry season and perfluorobutane sulfonate (PFBS) in the wet season, while long chain PFASs, such as perfluorooctane sulfonate (PFOS), dominated in the sediment. The highest concentration of PFASs in water were found in the estuary; in contrast, the highest level of PFASs in sediment were found in Xiamen Bay. These spatial distributions of PFASs indicate that river discharge is the main source of PFASs in estuarine water, while the harbor, airport and wastewater treatment plant near Xiamen Bay may be responsible for the high PFBS and PFOS concentrations in water and sediment. The partition coefficients (log Kd) of PFASs between sediment and water (range from 1.64 to 4.14) increased with carbon chain length (R2 = 0.99) and also showed a positive relationship with salinity. A preliminary environmental risk assessment indicated that PFOS and perfluorooctanoic acid (PFOA) in water and sediment pose no significant ecological risk to organisms.
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