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ΣPFCs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、PFHx A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.
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 Σ PFCs 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 ∶ 2FTOH,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∶ 2FTOHs,PFPeA,PFHx A and PFOA had positive correlations with PM2.5and PM10( P〈0. 05,P〈 0. 01) and were more positively correlated with the levels of PM10 than those of PM2.5.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2016年第4期1240-1247,共8页
Environmental Science
基金
国家自然科学基金项目(11275130)
关键词
全氟化合物
大气
被动采样器
氟调聚醇
大气颗粒物
perfluorinated compounds(PFCs)
atmosphere
passive air sampler
fluorotelomer alcohols(FTOHs)
atmospheric particulates