U.S. Geological Survey, Austin, TX 78754, USA.
Environ Sci Technol. 2010 Feb 1;44(3):894-900. doi: 10.1021/es902533r.
Despite much speculation, the principal factors controlling concentrations of polycyclic aromatic hydrocarbons (PAH) in settled house dust (SHD) have not yet been identified. In response to recent reports that dust from pavement with coal-tar-based sealcoat contains extremely high concentrations of PAH, we measured PAH in SHD from 23 apartments and in dust from their associated parking lots, one-half of which had coal-tar-based sealcoat (CT). The median concentration of total PAH (T-PAH) in dust from CT parking lots (4760 microg/g, n = 11) was 530 times higher than that from parking lots with other pavement surface types (asphalt-based sealcoat, unsealed asphalt, concrete [median 9.0 microg/g, n = 12]). T-PAH in SHD from apartments with CT parking lots (median 129 microg/g) was 25 times higher than that in SHD from apartments with parking lots with other pavement surface types (median 5.1 microg/g). Presence or absence of CT on a parking lot explained 48% of the variance in log-transformed T-PAH in SHD. Urban land-use intensity near the residence also had a significant but weaker relation to T-PAH. No other variables tested, including carpeting, frequency of vacuuming, and indoor burning, were significant.
尽管有很多推测，但控制定居房屋灰尘（SHD）中多环芳烃（PAH）浓度的主要因素尚未确定。针对最近有关铺有煤焦油基封层的路面灰尘中含有极高浓度 PAH 的报道，我们测量了 23 套公寓的 SHD 中以及与之相关的停车场的灰尘中的 PAH，其中一半铺有煤焦油基封层（CT）。来自 CT 停车场的灰尘中总多环芳烃（T-PAH）的中位数浓度（4760μg/g，n=11）比其他路面类型（基于沥青的封层、未密封的沥青、混凝土[中位数 9.0μg/g，n=12]）的停车场高 530 倍。来自 CT 停车场公寓的 SHD 中的 T-PAH（中位数 129μg/g）比来自其他路面类型停车场公寓的 SHD 中的 T-PAH（中位数 5.1μg/g）高 25 倍。停车场是否有 CT 可以解释 SHD 中 T-PAH 的 48%的变化。住所附近的城市土地利用强度也与 T-PAH 有显著但较弱的关系。测试的其他变量，包括地毯、吸尘频率和室内燃烧，均不显著。
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