| 深圳市大气中全氟化合物的残留特征 |
| 摘要点击 4438 全文点击 1837 投稿时间：2015-10-09 修订日期：2015-12-06 |
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| 中文关键词 全氟化合物 大气 被动采样器 氟调聚醇 大气颗粒物 |
| 英文关键词 perfluorinated compounds(PFCs) atmosphere passive air sampler fluorotelomer alcohols (FTOHs) atmospheric particulates |
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| 中文摘要 |
| 为探究深圳市大气中全氟化合物(perfluorinated compounds, PFCs)的残留特征, 基于负载XAD-4的PUF膜被动采样器采集了 2014年 11月 1日至 2015年 1月 31日深圳市 12个位点的大气样品,分析了大气中7种挥发性 PFCs和 15种离子型 PFCs的含量及分布特征. 结果表明,深圳市大气中 ΣPFCsΣ平均浓度为 79.0 pg ·m-3(23.7~157 pg ·m-3),以挥发性 PFCs为主. 8 :2氟调聚醇(fluorotelomer alcohol,FTOH)、6 :2 FTOH和全氟戊酸(perfluoropentanoic acid, PFPeA)、全氟辛酸(perfluorooctane acid, PFOA)分别是 挥发性和离子型PFCs的主要组分. 深圳市大气中挥发性和离子型PFCs的空间分布相同,均呈西北高东南低的态势. 此外,6:2 FTOHs、8 :2 FTOHs、PFPeA、PFHxA和 PFOA与 PM2.5、PM10呈正相关(P<0.05,P<0.01),而 与PM10的相关性更显著. |
| 英文摘要 |
| In order to explore the residual characteristics of perfluorinated compounds (PFCs) in the atmosphere of Shenzhen, passive air samplers consisting of polyurethane foam (PUF) disks impregnated with XAD-4 power were deployed at 12 sites in Shenzhen from November 2014 to February 2015. Seven volatile and fifteen ionic PFCs were analyzed. The results indicated that ΣPFCs concentration ranged from 23.7 pg ·m-3 to 157 pg ·m-3 (mean: 79.0 pg ·m-3), dominated by volatile PFCs, with 8 :2 FTOH,6 :2 FTOH, PFPeA, PFOA being the dominant compounds. The spatial distribution of volatile and ionic PFCs concentrations was the same, displaying the characteristic of "the northwest being higher than the southeast ". Furthermore, the concentrations of 6 :2 FTOHs,8 :2 FTOHs,PFPeA,PFHxA and PFOA had positive correlations with PM2.5 and PM10(P<0.05,P<0.01)and were more positively correlated with the levels of PM10 than those of PM2.5. |
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