当前位置: X-MOL 学术Environ. Sci. Technol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Certain Perfluoroalkyl and Polyfluoroalkyl Substances Associated with Aqueous Film Forming Foam Are Widespread in Canadian Surface Waters
Environmental Science & Technology ( IF 11.4 ) Pub Date : 2017-11-17 00:00:00 , DOI: 10.1021/acs.est.7b03994
Lisa A. D’Agostino 1 , Scott A. Mabury 1
Affiliation  

The presence of perfluoroalkyl and polyfluoroalkyl substances (PFASs) commonly associated with aqueous film forming foams (AFFFs) at sites without known AFFF contamination is a largely unexplored area, which may reveal widespread environmental contaminants requiring further investigation. Sensitive liquid chromatography-tandem mass spectrometry (LC-MS/MS) screening for 23 classes of PFASs, followed by quantitative analysis was used to investigate surface waters from rural, urban, and AFFF-impacted sites in Canada. The PFASs detected included perfluorohexane sulfonamide (FHxSA), 6:2 fluorotelomer sulfonamide (FTSAm), fluorotelomer sulfonamide alkylbetaines (FTABs), fluorotelomer betaines (FTBs), 6:2 fluorotelomer mercaptoalkylamido sulfonate sulfone (FTSAS-SO2), 6:2 fluorotelomerthiohydroxyl ammonium sulfoxide (FTSHA-SO), 6:2 fluorotelomer sulfonamide alkylamine (FTAA) and C3 to C6 perfluoroalkane sulfonamido amphoterics. Detection of FHxSA in all urban and AFFF-impacted sites (0.04–19 ng/L) indicates the widespread presence of rarely considered perfluorohexanesulfonate (PFHxS) precursors in Canadian waters. FTABs and FTBs were especially abundant with up to 16–33 ng/L of 6:2 FTAB in urban and AFFF-impacted water suggesting it may have additional applications, while FTBs were only in AFFF-impacted sites (qualitative; ∑FTBs 80 ng/L). The distributions of PFASs moving downstream along the AFFF-impacted Welland River and between water and sediment suggested differences in the persistence of various AFFF components and enhanced sorption of long-chain fluorotelomer betaines. Total organofluorine combustion-ion chromatography (TOF-CIC) revealed that fluorotelomer betaines were a substantial portion of the organofluorine in some waters and 36–99.7% of the total organofluorine was not measured in the targeted analysis.

中文翻译:

某些与水成膜泡沫有关的全氟烷基和多氟烷基物质在加拿大地表水域广泛传播

在没有已知的AFFF污染的地方,通常与水性成膜泡沫(AFFF)相关的全氟烷基和多氟烷基物质(PFAS)的存在是一个很大的未开发区域,可能会发现广泛的环境污染物,需要进一步研究。灵敏液相色谱-串联质谱(LC-MS / MS)筛查23种PFAS,然后进行定量分析,以调查加拿大农村,城市和AFFF影响地区的地表水。检测到的PFAS包括全氟己烷磺酰胺(FHxSA),6:2氟调聚物磺酰胺(FTSAm),氟调聚物磺酰胺烷基甜菜碱(FTAB),氟调聚物甜菜碱(FTB),6:2氟调聚物巯基烷基酰胺基磺酸砜(FTSAS-SO 2),6:2氟代端基硫代羟基亚砜(FTSHA-SO),6:2氟代端基磺酰胺烷基胺(FTAA)和C3至C6全氟烷烃磺酰胺两性。在所有城市和受AFFF影响的场所(0.04–19 ng / L)中检测到FHxSA,表明在加拿大水域中普遍存在很少考虑的全氟己烷磺酸盐(PFHxS)前体。FTAB和FTB尤其丰富,在城市和受AFFF影响的水中,FTAB高达16-33 ng / L的6:2 FTAB,表明它可能还有其他用途,而FTB仅在受AFFF影响的场所(定性;ΣFTB80 ng) / L)。沿着受AFFF影响的Welland河下游以及水和沉积物之间移动的PFAS的分布表明,AFAF的各种组分的持久性和长链含氟端粒甜菜碱的吸附能力有所提高。
更新日期:2017-11-19
down
wechat
bug