State Key Laboratory in Marine Pollution, Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China.
Environ Sci Technol. 2011 Jul 1;45(13):5506-13. doi: 10.1021/es200432n. Epub 2011 Jun 6.
Perfluorinated compounds (PFCs) are known to biomagnify in temperate and Arctic food webs, but little is known about their behavior in subtropical systems. The environmental distribution and biomagnification of PFCs, extractable organic fluorine (EOF), and total fluorine were investigated in a subtropical food web. Surface water, sediment, phytoplankton, zooplankton, gastropods, worms, shrimps, fishes, and waterbirds collected in the Mai Po Marshes Nature Reserve in Hong Kong were analyzed. Trophic magnification was observed for perfluorooctanesulfonate (PFOS), perfluorodecanoate (PFDA), perfluoroundecanoate (PFUnDA), and perfluorododecanoate (PFDoDA) in this food web. Risk assessment results for PFOS, PFDA, and perfluorooctanoate (PFOA) suggest that current PFC concentrations in waterbird livers are unlikely to pose adverse biological effects to waterbirds. All hazard ratio (HR) values reported for PFOS and PFOA are less than one, which suggests that the detected levels will not cause any immediate health effects to the Hong Kong population through the consumption of shrimps and fishes. However, only 10-12% of the EOF in the shrimp samples was comprised of known PFCs, indicating the need for further investigation to identify unknown fluorinated compounds in wildlife.
全氟化合物（PFCs）在温带和北极的食物网中被证实具有生物放大作用，但在亚热带系统中它们的行为却鲜为人知。本研究调查了亚热带食物网中 PFCs、可提取有机氟（EOF）和总氟的环境分布和生物放大情况。在香港米埔沼泽自然保护区采集了地表水、沉积物、浮游植物、浮游动物、腹足类动物、环节动物、虾类、鱼类和水鸟样本，并对其进行了分析。研究发现，在该食物网中，全氟辛烷磺酸（PFOS）、全氟癸酸（PFDA）、全氟十一烷酸（PFUnDA）和全氟十二烷酸（PFDoDA）均表现出生物放大效应。对水鸟肝脏中 PFOS、PFDA 和全氟辛酸（PFOA）的风险评估结果表明，目前水鸟肝脏中的 PFC 浓度不太可能对水鸟产生不利的生物学影响。报告的 PFOS 和 PFOA 的所有危害比（HR）值均小于 1，这表明通过食用虾类和鱼类，检测到的水平不会对香港人群造成任何即时的健康影响。然而，虾类样本中的 EOF 仅 10-12%由已知的 PFCs 组成，这表明需要进一步调查以确定野生动物中未知的含氟化合物。
