State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
Sci Total Environ. 2010 Jan 1;408(3):617-23. doi: 10.1016/j.scitotenv.2009.10.032. Epub 2009 Nov 5.
Perfluorinated acids (PFAs) have been recognized as emerging environmental pollutants because of their widespread occurrences, persistence, and bioaccumulative and toxicological effects. PFAs have been detected in aquatic environment and biota in China, but the occurrences of these chemicals have not been reported in solid matrices in China. In the present study, short- and long-chain PFAs (C2-C14) have been quantitatively determined in solid matrices including sediments, soils and sludge collected in Shanghai, China. The results indicate that sludge contains more PFAs than sediments and soils, and the total PFAs concentrations in sediments, soil and sludge are 62.5-276 ng g(-1), 141-237 ng g(-1) and 413-755 ng g(-1), respectively. In most cases, trifluoroacetic acid was the major PFA and accounted for 22-90% of the total PFAs. Although the levels of perfluorooctanoate (PFOA) and perfluorooctanesulfonate (PFOS) were not only lower than trifluoroacetic acid, but also lower than some short-chain PFCAs (<C8) in some individual cases, PFOA and PFOS were still the major pollution compounds in most cases and they constituted 2-34% and 1-9% of the total PFAs, respectively. Meanwhile, unlike previous studies, PFOS levels were not always higher than PFOA in solids collected in Shanghai, China. Given that some short-chain PFAs such as trifluoroacetic acid are mildly phytotoxic and their higher levels in solid matrices were collected in Shanghai, China, these chemicals should be included in future environmental monitoring efforts.
全氟羧酸（PFA）因其广泛存在、持久性、生物累积性和毒理学效应而被认为是新兴的环境污染物。在中国的水生环境和生物群中已经检测到了 PFA，但在固体基质中尚未报道这些化学物质的存在。本研究定量测定了中国上海采集的沉积物、土壤和污泥等固体基质中的短链和长链 PFA（C2-C14）。结果表明，污泥中 PFA 的含量高于沉积物和土壤，沉积物、土壤和污泥中的总 PFA 浓度分别为 62.5-276ng/g、141-237ng/g 和 413-755ng/g。在大多数情况下，三氟乙酸是主要的 PFA，占总 PFA 的 22-90%。尽管全氟辛酸（PFOA）和全氟辛烷磺酸（PFOS）的水平不仅低于三氟乙酸，而且在某些情况下还低于某些短链 PFCAs（<C8），但在大多数情况下，PFOA 和 PFOS 仍然是主要的污染化合物，分别占总 PFA 的 2-34%和 1-9%。同时，与以前的研究不同，在中国上海采集的固体中，PFOS 的水平并不总是高于 PFOA。鉴于三氟乙酸等某些短链 PFA 具有轻度植物毒性，且其在固体基质中的含量较高，这些化学物质应纳入未来的环境监测工作中。
