Partitioning of perfluorooctanoate (PFOA), perfluorooctane sulfonate (PFOS) and perfluorooctane sulfonamide (PFOSA) between water and sediment

被引：170
作者：
Ahrens, Lutz [1 ]
Yeung, Leo W. Y. [2 ]
Taniyasu, Sachi [3 ]
Lam, Paul K. S. [2 ]
Yamashita, Nobuyoshi [3 ]
机构：
[1] Helmholtz Zentrum Geesthacht, Ctr Mat & Coastal Res, Inst Coastal Res, Dept Environm Chem, D-21502 Geesthacht, Germany
[2] City Univ Hong Kong, Dept Biol & Chem, HKSAR, Hong Kong, Hong Kong, Peoples R China
[3] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki, Japan
来源：
CHEMOSPHERE | 2011年 / 85卷 / 05期
关键词：
PFOS; PFOA; PFOSA; PFCs; Partitioning; Sediment; PERFLUORINATED ACIDS; RIVER WATER; SORPTION; CONTAMINANTS; SURFACTANTS; DESORPTION; TRANSPORT; BEHAVIOR; SAMPLES; FISH;
D O I：
10.1016/j.chemosphere.2011.06.046
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Laboratory partitioning experiments were conducted to elucidate the sorption behaviour and partitioning of perfluoroalkyl compounds (PFCs). Three different sediment types were used and separately spiked with perfluorooctanoate (PFOA), perfluorooctane sulfonate (PFOS) and perfluorooctane sulfonamide (PFOSA) at low environmentally realistic concentrations. PFOA, PFOS and PFOSA were mainly distributed in the dissolved phase at low suspended solid concentrations, indicating their long-range transport potential in the marine environment. In all cases, the equilibrium isotherms were linear and the organic carbon normalised partition coefficients (K-OC) decreased in the following order: PFOSA (log K-OC = 4.1 +/- 0.35 cm(3) g(-1)) > PFOS (3.7 +/- 0.56 cm(3) g(-1)) > PFOA (2.4 +/- 0.12 cm(3) g(-1)). The level of organic content had a significant influence on the partitioning. For the sediment with negligible organic content the density of the sediment became the most important factor influencing the partitioning. Ultimately, data on the partitioning of PFCs between aqueous media and suspended solids are essential for modelling their transport and environmental fate. (C) 2011 Elsevier Ltd. All rights reserved.
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页码：731 / 737
页数：7
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