Institute for Coastal Research, GKSS Research Centre Geesthacht, Germany.
Chemosphere. 2010 Apr;79(3):266-72. doi: 10.1016/j.chemosphere.2010.01.045. Epub 2010 Feb 23.
This study examined the environmental behaviour and fate of polyfluoroalkyl compounds (PFCs) found in water, suspended particulate matter (SPM) and sediment. The sampling of the sediment was performed at two stations from Tokyo Bay, Japan, in 2008. In addition, a depth profile of seawater was collected at three water layers from both sampling stations. The summation operatorPFC concentrations ranged from 16.7 to 42.3ngL(-1) in the water column, from 6.4 to 15.1ngg(-1) dry weight (dw) in the SPM fraction and from 0.29 to 0.36dw in surface sediment. The distribution of PFCs was found to depend on their physicochemical characteristics. While short-chain perfluoroalkyl carboxylic acids (PFCAs) (C<7) were exclusively detected in the dissolved phase, longer-chain PFCAs (C7), perfluoroalkyl sulfonates (PFSAs), ethylperfluorooctane sulfonamidoacetic acid (EtFOSAA), and perfluorooctane sulfonamide (PFOSA) appeared to bind more strongly to particles. Results showed that the sorption of PFCs on SPM increases by 0.52-0.75 log units for each additional CF(2) moiety and that the sorption of PFSAs was 0.71-0.76 log units higher compared to the PFCA analogs. In addition, the sorption of PFCs was influenced by the organic carbon content. These data are essential for modelling the transport and environmental fate of PFCs.
本研究考察了在水中、悬浮颗粒物 (SPM) 和沉积物中发现的全氟烷基化合物 (PFC) 的环境行为和归宿。2008 年，在日本东京湾的两个站位进行了沉积物采样。此外，还在两个采样站位的三个水层采集了海水深度剖面。在水柱中，PFC 浓度总和范围为 16.7 至 42.3ng/L；在 SPM 部分为 6.4 至 15.1ng/g 干重 (dw)；在表层沉积物中为 0.29 至 0.36dw。发现 PFC 的分布取决于其物理化学特性。虽然短链全氟烷酸 (PFCAs) (C<7) 仅在溶解相中检测到，但长链 PFCAs (C7)、全氟烷基磺酸盐 (PFSAs)、乙基全氟辛烷磺酰胺基乙酸 (EtFOSAA) 和全氟辛烷磺酰胺 (PFOSA) 似乎与颗粒结合更强。结果表明，PFCs 在 SPM 上的吸附量每增加一个 CF(2) 基团就增加 0.52-0.75 个对数单位，而与 PFCA 类似物相比，PFSAs 的吸附量增加了 0.71-0.76 个对数单位。此外，PFCs 的吸附受有机碳含量的影响。这些数据对于模拟 PFCs 的迁移和环境归宿至关重要。
