Sha Bo, Dalmijn Joost, Johansson Jana H, Salter Matthew E, Cousins Ian T
Department of Environmental Science, Stockholm University, Stockholm SE-10691, Sweden.
Department of Thematic Studies - Environmental Change, Linköping University,, Linköping 581 83, Sweden.
Environ Sci Technol. 2025 Apr 8;59(13):6719-6728. doi: 10.1021/acs.est.4c11394. Epub 2025 Mar 25.
This study investigated the particle size distribution and atmospheric transport potential of perfluoroalkyl carboxylic acids (PFCAs) and certain perfluoroalkyl ether carboxylic acids (PFECAs) emitted from a mega fluoropolymer industrial park (FIP) in China. Ambient aerosols sampled in a residential area near the FIP were separated by a cascade impactor into five size fractions (<0.15 to 12.15 μm). Homologues of PFCAs (C5-C11) and five PFECAs were frequently detected in the samples (detection frequencies 40-100%), albeit not in all size fractions. Perfluorooctanoic acid (PFOA) exhibited the highest concentrations (6.5 to 2900 pg m). A noticeable mass mode in the >1 μm size range was observed for PFCAs and PFECAs in the samples that were directly influenced by wind from the direction of the FIP. Based on the PFOA concentrations in the aerosol samples, the emission rate of PFOA to air from the FIP was estimated to be 0.4-1.3 t year. Modeling results demonstrated that around 67% of the PFOA air emission was transported in the atmosphere above 1500 m in a 7 day continuous emission scenario, implying that the PFOA on <12.15 μm particles undergoes long-range atmospheric transport after being emitted from the FIP.
本研究调查了中国一个大型含氟聚合物工业园区（FIP）排放的全氟烷基羧酸（PFCA）和某些全氟烷基醚羧酸（PFECA）的粒径分布及大气传输潜力。在FIP附近居民区采集的环境气溶胶通过串联撞击器被分离为五个粒径部分（<0.15至12.15μm）。尽管并非在所有粒径部分都能检测到，但样品中经常检测到PFCA（C5 - C11）同系物和五种PFECA（检测频率为40 - 100%）。全氟辛酸（PFOA）的浓度最高（6.5至2900 pg/m）。在受来自FIP方向风直接影响的样品中，观察到PFCA和PFECA在>1μm粒径范围内有一个明显的质量模式。根据气溶胶样品中的PFOA浓度，估计FIP向空气中排放PFOA的速率为0.4 - 1.3吨/年。模型结果表明，在连续排放7天的情况下，约67%的PFOA空气排放物在1500米以上的大气中传输，这意味着FIP排放的<12.15μm颗粒上的PFOA在大气中经历长距离传输。
