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Perfluorinated Compounds in the Cape Fear Drainage Basin in North Carolina

机译：北卡罗莱纳州Cape Fear排水盆地中的全氟化合物

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摘要

Concern over perfluorinated organic compounds (PFCs), e.g., perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA), is due to a number of recent studies which show that the PFCs are persistent, bioaccumulative, and toxic in animals. Despite sustained interest in this topic, little information is available concerning the environmental distributions of the compounds. In this study, a new method was developed for the analysis of 10 target PFCs and its performance was examined in a systematic evaluation of surface water in the Cape Fear River Basin in North Carolina. One hundred samples from 80 different locations were collected during the spring of 2006. Detectable levels of the target PFCs were found in all samples, and were comparable to values reported previously, with maximum PFOS at 132 ng/L, PFOA at 287 ng/L, perfluorononanoic acid (C9) at 194 ng/L, and perfluorohep-tanoic acid (C7) at 329 ng/L. In general, the lowest concentrations of the PFCs were found in the smallest tributaries while the highest levels were found in middle reaches of the Drainage Basin. Variability of PFC concentrations suggests a series of source inputs throughout the Basin. Seventeen sample sites (22%) had PFOS concentrations greater than 43 ng/L, a conservative safe water concentration estimated to be protective of avian life. In addition, a total of 26 sites (32%) had PFOA concentrations above 40 ng/L.
机译：对全氟有机化合物（PFC）的关注，例如全氟辛烷磺酸盐（PFOS）和全氟辛酸（PFOA），是由于最近的许多研究表明PFC在动物中具有持久性，生物蓄积性和毒性。尽管对该主题有持续的兴趣，但是关于化合物的环境分布的信息很少。在这项研究中，开发了一种用于分析10种目标PFC的新方法，并在北卡罗来纳州Cape Fear河盆地的地表水系统评价中检查了其性能。在2006年春季，从80个不同地点收集了100个样品。在所有样品中均检测到目标PFC的可检测水平，与先前报告的值相当，最大PFOS为132 ng / L，PFOA为287 ng / L。 ，194 ng / L的全氟壬酸（C9）和329 ng / L的全氟庚酸（C7）。通常，在最小的支流中发现最低的PFCs浓度，而在流域的中游发现最高的PFCs浓度。 PFC浓度的变化表明整个流域都有一系列的源输入。十七个采样点（22％）的全氟辛烷磺酸浓度大于43 ng / L，保守的安全水浓度估计可以保护鸟类生命。此外，共有26个场所（32％）的PFOA浓度高于40 ng / L。

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