Temporal Trends and Pattern of Polyfluoroalkyl Compounds in Tawny Owl (Strix aluco) Eggs from Norway, 1986鈭?009

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• 作者：Lutz Ahrens ; Dorte Herzke ; Sandra Huber ; Jan Ove Bustnes ; Georg Bangjord ; Ralf Ebinghaus
• 刊名：Environmental Science & Technology
• 出版年：2011
• 出版时间：October 1, 2011
• 年：2011
• 卷：45
• 期：19
• 页码：8090-8097
• 全文大小：951K
• 年卷期：v.45,no.19(October 1, 2011)
• ISSN：1520-5851

文摘

Temporal trends of polyfluoroalkyl compounds (PFCs) were examined in tawny owl (Strix aluco) eggs collected in Central Norway over a period of 24 years (1986鈭?009). Concentrations of 12 PFCs, including C₆鈭扖₈, C₁₀ perfluoroalkyl sulfonates (PFSAs), perfluorooctane sulfonamide (PFOSA), and C₈鈭扖₁₄ perfluoroalkyl carboxylates (PFCAs), were measured, whereas saturated and unsaturated fluorotelomer carboxylates and shorter chain PFSAs and PFCAs were not detected. Perfluorooctane sulfonate (PFOS) was the predominant compound (geometric mean 10.1 ng/g wet weight (ww)), followed by perfluorotridecanoate (PFTriDA) (0.36 ng/g ww) and perfluoroundecanoate (PFUnDA) (0.19 ng/g ww). Significant decreasing concentrations were found for PFOS with an annual decrease of 1.6% (1986鈭?009), while, conversely, the C₁₀鈭扖₁₃ PFCA concentrations increase significantly with an annual increase of 4.2鈭?2% (1986鈭?009). Consequently, the contribution of PFOS to the 鈭慞FCs decreased, whereas the contribution of the 鈭慞FCAs increased over the time. Toxicological implications for tawny owls are limited, but the maximal PFOS concentration found in this stu0dy is about 20 times lower than the predicted avian no effect concentration (PNEC) which suggest adverse effects caused by PFOS are unlikely. However, tawny owls are exposed to a mixture of various PFCs, and PFCA concentrations still increase.