MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China.
Department of Civil Engineering, McGill University, Montreal, Quebec H3A 0C3, Canada.
Environ Sci Technol. 2020 Nov 17;54(22):14254-14264. doi: 10.1021/acs.est.0c00934. Epub 2020 Nov 6.
Tianjin, located in Bohai Bay, China, constitutes a relevant study area to investigate emerging per- and polyfluoroalkyl substances (PFASs) due to its high population density, clustering of chemical and aircraft industries, as well as international airports, harbors, and oil rigs. In this study, 53 anionic, zwitterionic, and cationic PFASs were monitored in river surface water, groundwater, seawater, and sediments in this area (overall = 226). 6:2 chlorinated polyfluorinated ether sulfonic acid (Cl-PFESA), perfluorooctanoic acid, and perfluorooctane sulfonic acid were generally the predominant PFASs. 6:2 fluorotelomer sulfonamidoalkyl betaine (6:2 FTAB) was also widespread (occurrence >86%), with the highest concentration (1300 ng/L) detected at contamination hot spots impacted by wastewater effluents. The aqueous film-forming foam (AFFF)-related PFASs with sulfonamide betaine, amine oxide, amine, or quaternary ammonium moieties are also reported for the first time in river water and seawater samples. Fifteen classes of infrequently reported PFASs, including :2 FTABs and :2 fluorotelomer sulfonamide amines, hydrogen-substituted PFESA homologues, and -perfluorous nonenoxybenzenesulfonate (OBS), were also identified in the water and sediment samples using suspect screening. Field-derived sediment-water distribution coefficients () of these emerging PFASs are provided for the first time, confirming that cationic and zwitterionic PFASs tend to be strongly associated with sediments.
天津位于中国渤海湾，由于人口密度高、化工和航空工业集中、以及拥有国际机场、港口和石油钻井平台，成为研究新兴全氟和多氟烷基物质（PFASs）的相关地区。本研究监测了该地区河流水体、地下水、海水和沉积物中 53 种阴离子、两性离子和阳离子 PFASs（总计 226 种）。6:2 氯代全氟醚磺酸（Cl-PFESA）、全氟辛酸（PFOA）和全氟辛烷磺酸通常是主要的 PFASs。6:2 氟代烷氧基磺酰胺基烷基甜菜碱（6:2 FTAB）也广泛存在（检出率>86%），在受废水影响的污染热点处检测到的浓度最高（1300ng/L）。首次在河水和海水中也报告了含磺酰胺甜菜碱、氧化胺、胺或季铵基的水性成膜泡沫（AFFF）相关 PFASs。在水样和沉积物样品中还采用可疑筛查方法鉴定出了 15 类少见报道的 PFASs，包括：2 FTABs 和：2 氟代烷氧基磺酰胺胺、氢取代 PFESA 同系物和 -全氟壬基苯氧基磺酸盐（OBS）。首次提供了这些新兴 PFASs 的现场衍生沉积物-水分配系数（Kd），证实了阳离子和两性离子 PFASs 倾向于与沉积物强烈结合。
