DOI: 10.1016/j.atmosenv.2014.06.036
Scopus记录号: 2-s2.0-84903195874
论文题名: Atmospheric concentrations and gas/particle partitioning of neutral poly- and perfluoroalkyl substances in northern German coast
作者: Wang Z ; , Xie Z ; , Möller A ; , Mi W ; , Wolschke H ; , Ebinghaus R
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 95 起始页码: 207
结束页码: 213
语种: 英语
英文关键词: FTOHs
; Gas/particle partitioning
; Long range atmospheric transport
; Polyfluoroalkyl substances
Scopus关键词: Aerosols
; Atmospheric movements
; Dissociation
; Hydrostatic pressure
; pH
; Sulfur compounds
; Acid dissociation constants
; Air mass back trajectories
; FTOHs
; Gas/particle partitioning
; Long-range atmospheric transports
; Perfluoroalkyl substances
; Perfluorooctane sulfonamide (FOSAs)
; Polyfluoroalkyl substances
; Vapors
; acrylic acid derivative
; alcohol derivative
; fluorotelomer acrylate
; functional group
; perfluoroalkyl
; perfluorooctane
; perfluorooctane sulfonamide
; perfluorooctane sulfonamidoethanol
; sulfonamide
; unclassified drug
; air quality
; air sampling
; atmospheric chemistry
; coastal zone
; concentration (composition)
; condensation
; functional group
; vapor pressure
; absorption
; aerosol
; air sampling
; article
; atmosphere
; atmosphere concentration
; atmospheric transport
; concentration (parameters)
; dissociation constant
; environmental impact
; gas
; Germany
; industrial area
; loglinear model
; particle size
; pH
; priority journal
; quality control
; seashore
; urban area
; vapor pressure
; Germany
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
英文摘要: Total 58 high volume air samples were collected in Büsum, Germany, from August 2011 to October 2012 to investigate air concentrations of 12 per- and polyfluoroalkyl substances (PFASs) and their gas/particle partitioning. The total concentration (vapor plus particle phases) of the 12 PFASs (σPFASs) ranged from 8.6 to 155pg/m3 (mean: 41pg/m3) while fluorotelomer alcohols 8:2 (8:2 FTOH) dominated all samples accounting for 61.9% of σPFASs and the next most species were 10:2 FTOH (12.7%). Air mass back trajectory analysis showed that atmospheric PFASs in most samples were from long range atmospheric transport processes and had higher ratios of 8:2 to 6:2 FTOH compared to the data obtained from urban/industrial sources. Small portion of particle PFASs in the atmosphere was observed and the average percent to σPFASs was 2.0%. The particle-associated fractions of different PFASs decreased from perfluorooctane sulfonamidoethanols (FOSEs) (15.5%) to fluorotelomer acrylates (FTAs) (7.6%) to perfluorooctane sulfonamides (FOSAs) (3.1%) and FTOHs (1.8%), indicating the functional group obviously influenced their gas/particle partitioning. For neutral compounds with acid dissociation constant (pKa)>7.0 (i.e., FTOHs, FOSEs and FOSAs), a significant log-linear relationship was observed between their gas/particle partition coefficients (KSP) and vapor pressures (p;L), suggesting the gas/particle partitioning of neutral PFASs agreed with the classical logKSP-logp;L relation. Due to the pKa values of 6:2 and 8:2 FTA below the typical environmental pH conditions, they mainly exist as ionic form in aerosols, and the corrected logKSP (neutral form) were considerably lower than those of FTOHs, FOSEs and FOSAs with similar vapor pressures. Considering the strong partitioning potential to aqueous phases for ionic PFASs at higher pH values, a need exists to develop a model taking account of the ad/absorption mechanism to the condensed phase of aerosols for ionizable PFASs (e.g., FTAs). © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81263
Appears in Collections: 气候变化事实与影响
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作者单位: Helmholtz-Zentrum Geesthacht, Institute for Coastal Research, 21502 Geesthacht, Germany; National Marine Environmental Monitoring Center, Dalian 116023, China; GBA Gesellschaft für Bioanalytik mbH, Hamburg, Germany
Recommended Citation:
Wang Z,, Xie Z,, Möller A,et al. Atmospheric concentrations and gas/particle partitioning of neutral poly- and perfluoroalkyl substances in northern German coast[J]. Atmospheric Environment,2014-01-01,95