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Particle size distribution and respiratory deposition estimates of airborne perfluoroalkyl acids during the haze period in the megacity of Shanghai 期刊论文

编号：

e6c505bc-6b57-4386-b740-c258b0019898
作者：

Guo, Mengjie^[1] Lyu, Yan^[1] Xu, Tingting^[1,2] Yao, Bo^[1] Song, Weihua^[1] Li, Mei^[3] Yang, Xin^[1] Cheng, Tiantao^[1] Li, Xiang^[1,2]
语种：

English
期刊：

ENVIRONMENTAL POLLUTION ISSN：0269-7491 2018 年 234 卷 (9 - 19) ; MAR
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关键词：

Particle size distribution Respiratory deposition Airborne perfluoroalkyl acids Haze Shanghai
摘要：

This study presents the particle size distribution and respiratory deposition estimates of airborne perfluoroalkyl acids (PFAAs) during the haze period. Size-segregated haze aerosols were collected from an urban location in Shanghai using an eight-stage air sampler. The samples were analyzed for eight PFAAs using ultra-high-performance liquid chromatography tandem triple quadrupole mass spectrometry. The quantification results showed that the concentrations of particle-bound Sigma 8PFAAs ranged from 0.26 to 1.90 ng m(-3) (mean: 1.44 ng m(-3)). All of the measured PFAAs particle size distributions had a bimodal mode that peaked respectively in accumulation size range (0.4 < Dp < 2.1 mu m) and coarse size ranges (Dp > 2.1 mu m), but the width of each distribution somewhat varied by compound. The emission source, molecular weight, and volatility of the PFAAs were important factors influencing the size distribution of particle-bound PFAAs. Of these compounds, PFUnDA presented a strong accumulation in the fine size range (average 75% associated with particles <2.1 mu m), followed by PFOA (69%) and PFDA (64%). The human risk assessment of PFOS via inhalation was addressed and followed the same pattern as the size distribution, with a 2-fold higher risk for the fine particle fraction compared to the coarse particle fraction at urban sites. Approximately 30.3-82.0% of PFAA deposition (Sigma PFAA: 72.5%) in the alveolar region was associated with particles <2.1 mu m, although the contribution of fine particles to the total PFAAs concentration in urban air was only 28-57% (Sigma 8PFAAs: 48%). These results suggested that fine particles are significant contributors to the deposition of PFAAs in the alveolar region of the lung. (C) 2017 Elsevier Ltd. All rights reserved.
推荐引用方式
GB/T 7714：

Guo Mengjie,Lyu Yan,Xu Tingting, et al. Particle size distribution and respiratory deposition estimates of airborne perfluoroalkyl acids during the haze period in the megacity of Shanghai [J].ENVIRONMENTAL POLLUTION,2018,234:9-19.
APA：

Guo Mengjie,Lyu Yan,Xu Tingting,Yao Bo,&Li Xiang.(2018).Particle size distribution and respiratory deposition estimates of airborne perfluoroalkyl acids during the haze period in the megacity of Shanghai .ENVIRONMENTAL POLLUTION,234:9-19.
MLA：

Guo Mengjie, et al. "Particle size distribution and respiratory deposition estimates of airborne perfluoroalkyl acids during the haze period in the megacity of Shanghai" .ENVIRONMENTAL POLLUTION 234(2018):9-19.

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