Long-term atmospheric bulk deposition of polycyclic aromatic hydrocarbons (PAHs) in rural areas of Southern Germany |
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| Institution: | 1. Center for Applied Geoscience, University of Tuebingen, Sigwartstraße 10, 72076 Tuebingen, Germany;2. Institute of Terrestrial Ecosystem Research, University of Bayreuth, Dr. Hans-Frisch-Straße 1–3, 95448 Bayreuth, Germany;1. Department of Geosciences, University of Rhode Island, Kingston, RI 02881, USA;2. Department of Civil and Environmental Engineering, University of Rhode Island, Kingston, RI 02881, USA;1. Departamento de Química Analítica, Universidad de Extremadura, Av. de Elvas, s/n 06006, Badajoz, Spain;2. Centro de Tecnologías Ambientales, Universidad Técnica Federico Santa María, Av. de España, Valparaíso, Chile |
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| Abstract: | 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 μg 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. |
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