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首页> 外文期刊>Environmental Science & Technology >Indoor and outdoor polycyclic aromatic hydrocarbons in residences surrounding a Soderberg aluminum smelter in Canada
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Indoor and outdoor polycyclic aromatic hydrocarbons in residences surrounding a Soderberg aluminum smelter in Canada

机译：加拿大Soderberg铝冶炼厂周围住宅中的室内和室外多环芳烃

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Ambient air in 18 residences surrounding an aluminum smelter were sampled to study the relationship between indoor and outdoor polycyclic aromatic hydrocarbons (PAHs). Objectives of the study were to quantify the indoor distribution of PAHs, indoor/outdoor (I/O) concentration ratios, and the relationship among PAH compounds. Correlation coefficients inside residences suggested an indoor source of 2-3 ring PAHs and an external source of 4-6 ring PAHs. The I/O ratios of 4-6 ring PAHs for homes without any substantial indoor sources were below unity, indicating that the presence of these PAHs was attributable to the aluminum smelter. Least squares linear regression of the coupled measurements without indoor sources of 5-6 ring PAHs resulted in average infiltration efficiencies (P-PAH) of 0.49, 0.20, and 0.47 for benzo[a]pyrene, benzo[k]fluoranthene, and benzo[g,h,i]perylene, respectively. These P-PAH values suggest that simultaneous measurements of indoor and outdoor concentrations of PAHs > 4 rings predominantly associated with the fine fraction of particulate matter could provide useful estimates of particle infiltration efficiency. Overall, study results indicate that when an industrial facility is the main source of outdoor 4-6 ring PAHs,the contribution of facility emissions may greatly exceed indoor sources in nonsmoking residences.
机译：对铝冶炼厂周围18个住宅区的环境空气进行了采样，以研究室内和室外多环芳烃（PAH）之间的关系。该研究的目的是量化PAH在室内的分布，室内/室外（I / O）浓度比以及PAH化合物之间的关系。住宅内部的相关系数表明，室内来源为2-3个环PAH，外部来源为4-6个环PAH。对于没有任何大量室内来源的房屋，4-6环PAH的I / O比低于1，表明这些PAH的存在与铝冶炼厂有关。没有室内来源的5-6个环PAHs的耦合测量的最小二乘线性回归导致苯并[a] re，苯并[k]荧蒽和苯并[a]的平均渗透效率（P-PAH）为0.49、0.20和0.47。 g，h，i] per。这些P-PAH值表明，同时测量主要与细颗粒物质有关的室内和室外PAHs> 4个环的浓度可以提供有用的颗粒渗透效率估算值。总体而言，研究结果表明，当工业设施是室外4-6环PAH的主要来源时，在无烟住宅中，设施排放的贡献可能大大超过室内来源。

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