【引用本文】 杨朔, 陈辉伦, 盖楠, 等. 北京市大气颗粒物中全氟烷基化合物的粒径分布特征[J]. 岩矿测试, 2018, 37(5): 549-557. doi: 10.15898/j.cnki.11-2131/td.20180620074
YANG Shuo , CHEN Hui-lun , GAI Nan , et al. Particle Size Distribution of Perfluoroalkyl Substances in Atmospheric Particulate Matter in Beijing[J]. Rock and Mineral Analysis, 2018, 37(5): 549-557. doi: 10.15898/j.cnki.11-2131/td.20180620074

北京市大气颗粒物中全氟烷基化合物的粒径分布特征

1. 北京科技大学, 北京 100083;

2. 自然资源部生态地球化学重点实验室, 国家地质实验测试中心, 北京 100037

收稿日期: 2018-06-20  修回日期: 2018-08-05 

基金项目: 国家自然科学基金项目(41603021,41473074)

作者简介: 杨朔,硕士研究生,环境工程专业。E-mail:tdchys@163.com。。

Particle Size Distribution of Perfluoroalkyl Substances in Atmospheric Particulate Matter in Beijing

1. University of Science and Technology Beijing, Beijing 100083, China;

2. Key Laboratory of Eco-geochemistry, Ministry of Natural Resources, National Research Center for Geoanalysis, Beijing 100037, China

Received Date: 2018-06-20
Revised Date: 2018-08-05

摘要:人为排放的持久性有机污染物倾向于在细级大气颗粒物中富集,但目前国内外关于大气颗粒物中全氟烷基化合物(PFASs)粒径分布在不同国家地区有显著差异,如在我国北京地区PFASs在不同粒径大气颗粒物中的富集能力尚不清楚。本文采用五级大流量主动分级采样器采集了北京市大气颗粒物样品,利用超声萃取结合高效液相色谱-电喷雾负电离源串联质谱测定PFASs含量,探讨了该地区大气颗粒物中PFASs的浓度水平和粒径分布特征,以及大气颗粒物浓度变化对PFASs浓度变化的影响。结果表明:研究区∑PFASs范围为10.1~62.9 pg/m3,76.4%~83.8%的PFASs集中分布在PM2.5颗粒物中,其中含量较高的PFOA、PFNA和PFDA在<0.25 μm细颗粒物中占比最高,分别为26.3%~43.7%、30.3%~68.6%和30.6%~49.7%;PFOS在<0.25 μm细颗粒物中没有检出,主要分布在1~2.5 μm和0.25~1 μm颗粒物中。此外,研究发现北京市霾天大气颗粒物中∑PFASs为晴天的3.5倍,且不同粒径大气颗粒物浓度变化对PFASs各化合物表现出不同的富集能力,其中PFOA、PFOS、PFNA和PFDA等中链PFASs更易富集。

关键词: 全氟烷基化合物, 大气颗粒物, PM2.5, 粒径分布, 富集能力

Particle Size Distribution of Perfluoroalkyl Substances in Atmospheric Particulate Matter in Beijing

KEY WORDS: perfluoroalkyl substances (PFASs), ambient air particulate, PM2.5, particle size distribution, accumulation capacity

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北京市大气颗粒物中全氟烷基化合物的粒径分布特征

杨朔, 陈辉伦, 盖楠, 路国慧, 郑宇, 邵鹏威, 杨永亮