DOI: 10.1016/j.atmosenv.2015.05.028
Scopus记录号: 2-s2.0-84938093301
论文题名: Atmospheric gas-particle partitioning versus gaseous/particle-bound deposition of SVOCs: Why they are not equivalent
作者: Glüge J ; , Bogdal C ; , Scheringer M ; , Hungerbühler K
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 115 起始页码: 317
结束页码: 324
语种: 英语
英文关键词: Deposition
; Forest
; Gas-particle partitioning
; Particle-bound
; Polychlorinated biphenyls
; Semi-volatile organic compounds
Scopus关键词: Chemicals
; Forestry
; Gases
; Ionization of gases
; Organic chemicals
; Organic compounds
; Organic pollutants
; Polychlorinated biphenyls
; Volatile organic compounds
; Deposition velocities
; Different mechanisms
; Forest
; Gas-particle partitioning
; Polychlorinated biphenyl (PCBs)
; Semi-volatile organic compounds (SVOCs)
; Semivolatile organic compounds
; Temperature dependent
; Deposition
; polychlorinated biphenyl
; volatile organic compound
; atmospheric deposition
; atmospheric gas
; atmospheric pollution
; coniferous forest
; environmental fate
; particle motion
; PCB
; pollution monitoring
; volatile organic compound
; Article
; atmosphere
; controlled study
; forest
; gas
; priority journal
; seasonal variation
; sensitivity analysis
; summer
; winter
; Deposition
; Forests
; Hardwoods
; Polychlorinated Biphenyls
; Voc
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: Semi-volatile organic compounds (SVOCs) can be particle-bound or in the gas phase in the atmosphere, depending on the (temperature dependent) gas-particle partitioning of the chemicals and the fraction of particles in air. Several studies linked gas-particle partitioning of SVOCs in the atmosphere directly to the gaseous/particle-bound deposition of these chemicals, i.e. in cases of compounds occurring mainly in the gas phase, the deposition was also assumed to be mainly in gaseous form. In this study, we apply a multi-media fate model to point out that gas-particle partitioning of SVOCs in air and gaseous/particle-bound deposition of SVOCs are driven by different mechanism and, thus, cannot be deduced from each other. We apply our calculations to polychlorinated biphenyls (PCBs), as model SVOCs. We show that the fraction of particle-bound deposition to deciduous forest is 1.5-190 times higher in winter and between 5 and 1000 times higher in summer than the particle-bound fraction of these chemicals in air. The fraction of particle-bound deposition to coniferous forest is 1.5-172 times higher in winter and between 5 and 1000 times higher in summer than the particle-bound fraction of PCBs in air. In addition to the fractions of particle-bound SVOCs in air and particle-bound deposition, we recalculated particle-bound and gaseous deposition velocities to coniferous and deciduous forest for PCBs. The deposition velocities obtained for dry gaseous deposition (<1 m/h) are much lower than the existing values in the literature (10-200 m/h) because earlier studies assumed that for PCBs occurring predominantly in the gas phase, interception was also completely due to dry gaseous deposition. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81664
Appears in Collections: 气候变化事实与影响
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作者单位: Institute for Chemical and Bioengineering, Swiss Federal Institute of Technology, ETH Zurich, Zürich, Switzerland; Environmental Chemistry and Substance Dynamics, Leuphana University Lüneburg, Lüneburg, Germany
Recommended Citation:
Glüge J,, Bogdal C,, Scheringer M,et al. Atmospheric gas-particle partitioning versus gaseous/particle-bound deposition of SVOCs: Why they are not equivalent[J]. Atmospheric Environment,2015-01-01,115