A passive air sampler for characterizing the vertical concentration profile of gaseous phase polycyclic aromatic hydrocarbons in near soil surface air

Zhang, Yuzhong, Deng, Shuxing, Liu, Yanan, Shen, Guofeng, Li, Xiqing, Cao, Jun, Wang, Xilong, Reid, Brian and Tao, Shu (2011) A passive air sampler for characterizing the vertical concentration profile of gaseous phase polycyclic aromatic hydrocarbons in near soil surface air. Environmental Pollution, 159 (3). pp. 694-699. ISSN 1873-6424

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Abstract

Air–soil exchange is an important process governing the fate of polycyclic aromatic hydrocarbons (PAHs). A novel passive air sampler was designed and tested for measuring the vertical concentration profile of 4 low molecular weight PAHs in gaseous phase (PAHLMW4) in near soil surface air. Air at various heights from 5 to 520 mm above the ground was sampled by polyurethane foam disks held in down-faced cartridges. The samplers were tested at three sites: A: an extremely contaminated site, B: a site near A, and C: a background site on a university campus. Vertical concentration gradients were revealed for PAHLMW4 within a thin layer close to soil surface at the three sites. PAH concentrations either decreased (Site A) or increased (Sites B and C) with height, suggesting either deposition to or evaporation from soils. The sampler is a useful tool for investigating air–soil exchange of gaseous phase semi-volatile organic chemicals.

Item Type: Article
Faculty \ School: Faculty of Science > School of Environmental Sciences
Depositing User: Rosie Cullington
Date Deposited: 21 Jan 2011 14:18
Last Modified: 22 May 2019 16:30
URI: https://ueaeprints.uea.ac.uk/id/eprint/19476
DOI: 10.1016/j.envpol.2010.12.002

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