期刊
CHEMOSPHERE
卷 85, 期 5, 页码 731-737出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2011.06.046
关键词
PFOS; PFOA; PFOSA; PFCs; Partitioning; Sediment
资金
- German Federal Environmental Foundation
- International Bureau from the Federal Ministry of Education and Research [JPN 08/A02]
- University Grants Committee of the Hong Kong Special Administrative Region, China [AoE/P-04/2004]
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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