Long-term atmospheric bulk deposition of polycyclic aromatic hydrocarbons (PAHs) in rural areas of Southern Germany
Long-term atmospheric bulk deposition of polycyclic aromatic hydrocarbons (PAHs) in rural areas of Southern Germany
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DOI：
10.1016/j.atmosenv.2006.09.036
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发表时间：
2007-02-01
影响因子：
5
通讯作者：
Grathwohl, Peter
中科院分区：
文献类型：
--
作者：
Gocht, Tilman;Klemm, Otto;Grathwohl, Peter
在对德国南部三个农村地区多环芳烃 (PAH) 大气沉降的长期监测计划中，采用了一种使用漏斗吸附器筒装置的新型被动采样技术并在现场进行了验证。除季节变化外，PAHs总量的年沉积率相当稳定，约为200 μg m(-2) yr(-1)。时间积分被动采样器显示，地形引起的空间变化可以忽略不计，露天和森林沉积之间的差异在 2 倍以内。根据与环境温度的相关性，平流被确定为控制 PAH 大气沉积的最重要因素。气体吸附对森林中半挥发性化合物的沉积有显着贡献，但颗粒沉积似乎是所有多环芳烃的主要途径。 (c) 2006 Elsevier Ltd. 保留所有权利。
A novel passive sampling technique using a funnel-adsorber-cartridge device was adopted and validated in the field during a long-term monitoring program on the atmospheric deposition of polycyclic aromatic hydrocarbons (PAHs) in three rural regions of southern Germany. Apart from seasonal variations, fairly stable annual deposition rates around 200 mu g m(-2) yr(-1) for the sum of PAHs were obtained. The time-integrating passive samplers showed that spatial variability due to topography was negligible and differences between open-field and forest deposition were within a factor of 2. Based on correlations with ambient temperature, advection was identified as the most important factor that controls the atmospheric deposition of PAHs. Gas-adsorption contributes significantly to the deposition of the semivolatile compounds in forests, but particle deposition seems to be the major pathway for all PAHs. (c) 2006 Elsevier Ltd. All rights reserved.