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首页> 外文期刊>Environmental Science & Technology >Deposition Mapping of Polycyclic Aromatic Compounds in the Oil Sands Region of Alberta, Canada and Linkages to Ecosystem Impacts
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Deposition Mapping of Polycyclic Aromatic Compounds in the Oil Sands Region of Alberta, Canada and Linkages to Ecosystem Impacts

机译：加拿大艾伯塔省油砂地区的多环芳族化合物沉积图及与生态系统影响的联系

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This study produced gridded deposition estimates of polycyclic aromatic compounds (PACs), including 17 polycyclic aromatic hydrocarbons (PAHs), 21 alkylated PAHs (alk-PAHs), and 5 dibenzothiophenes (DBTs), over the oil sands region of Alberta, Canada and surrounding communities. Gridded annual total deposition of PACs in 2011 ranged from 55 to 175 000 mu g m(-2) yr(-1) and the mean and median fluxes were 1700 and 760 mu g m(-2) yr(-1), respectively. The domain-wide mean dry and wet deposition were 600 and 1100 mu g m(-2) yr(-1). PAHs, alk-PAHs and DBTs contributed 19%, 74%, and 7% to the total dry deposition, and 42%, 49%, and 9% to the total wet deposition. Dominant chemical species contributing to total deposition were naphthalene, retene and phenanthrene for PAHs and C2-benz[a]anthracene/triphenylene/chrysene, C2-fluoranthene/pyrene and C2-fluorene for alk-PAHs. The highest PAC deposition was found over the surface mineable area, which received 9 times the deposition flux of outlying areas. Additional deposition hotspots were also observed south of the surface mineable area notably over in situ bitumen production sites. The deposition of alk-PAHs impacted a more extensive area than that of PAHs or DBTs. This result suggests that atmospheric deposition is a key process in wildlife exposure to PACs across the region.
机译：这项研究得出了多环芳族化合物（PAC）的网格沉积估算值，包括加拿大艾伯塔省油砂地区及周边地区的17种多环芳烃（PAH），21种烷基化PAH（alk-PAHs）和5种二苯并噻吩（DBT）。社区。 2011年PAC的网格化年度总沉积量范围为55至175 000μg m（-2）yr（-1），平均流量和中值通量分别为1700和760μg m（-2）yr（-1）。全域平均干湿沉降分别为600和1100μg m（-2）yr（-1）。 PAH，alk-PAH和DBT分别占干沉积总量的19％，74％和7％，占湿沉积总量的42％，49％和9％。有助于总沉积的主要化学物质是用于PAHs的萘，丁烯和菲，用于烷基PAHs的C2-苯并[a]蒽/三苯撑/ ch，C2-荧蒽/ py和C2-芴。在可开采的地面区域发现了最高的PAC沉积，该区域的沉积通量是外围区域的9倍。在地表可采矿区的南部还观察到了其他沉积热点，特别是在原位沥青生产场地上方。与PAH或DBT相比，alk-PAH的沉积影响面积更大。这一结果表明，大气沉积是该地区野生生物暴露于PAC中的关键过程。

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