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首页> 外文会议> >Integrating on-line and off-line measurement for assessment of potential human exposure to particle-bound polycyclic aromatic hydrocarbons (pPAHs) in Bangkok, Thailand
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Integrating on-line and off-line measurement for assessment of potential human exposure to particle-bound polycyclic aromatic hydrocarbons (pPAHs) in Bangkok, Thailand

机译：集成在线和离线测量以评估泰国曼谷潜在的人类暴露于颗粒结合的多环芳烃（pPAH）的可能性

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A photoelectric aerosol sensor (PAS), which provides continuous signal in relation to the total particle-bound polycyclic aromatic hydrocarbons (pPAHs) concentration, was used to measure the real-time concentrations in the vicinity of road in Bangkok (Thailand). The measurements at roadside and general areas were carried out for approximately seven consecutive days in March and in August 2001. Potency equivalency factors (PEFs) of classified carcinogenic PAHs, which have been developed by the California EPA, was applied to assess the lifetime cancer risk of potential human exposure to these substances from the real-time measurement. A satisfactory linear correlation was obtained between the total amount of pPAHs detected by the PAS and the total PEF-weight concentration of seven carcinogenic PAHs determined by gas chromatography/mass spectrometry (GC/MS). At roadside, no large difference in average pPAHs concentration were observed between both periods studied, whereas larger difference was found at the general area, giving the ratio of the average concentration iof the former to that of the latter a value of 2:1. This suggests that pPAHs more dispersed during the second campaign, due to stronger wind flow observed. As a result, the background cancer risk estimated at the general area of the second period was about 1.5 times higher than that of the first period. At roadside areas, including at ground and 4-storey height levels, an additional cancer risk due to road traffic was 1.2 x 10~(-6) and 7.1 x 10~(-7), respectively. In addition, the additional risk of the motorized road user during workday was estimated as 1.8 x 10~(-6). This approach could then give a simpler way to assess the potential risk associated with human exposure to pPAHs.
机译：光电气溶胶传感器（PAS）提供了与总颗粒结合的多环芳烃（pPAHs）浓度有关的连续信号，用于测量曼谷（泰国）道路附近的实时浓度。在路边和一般区域的测量在2001年3月和2001年8月连续进行了大约7天。加利福尼亚州EPA开发的分类致癌PAH的效能当量因子（PEF）用于评估终生癌症风险实时测量显示人类可能接触这些物质。在通过PAS检测的pPAH总量与通过气相色谱/质谱（GC / MS）测定的七个致癌PAH的总PEF重量浓度之间，获得了令人满意的线性相关性。在路边，研究的两个时期之间均未发现pPAHs的平均浓度有较大差异，而在整个地区发现的差异较大，前者与后者的平均浓度之比为2：1。这表明，由于观察到更强的风流，pPAHs在第二次运动期间更加分散。结果，在第二阶段的整个区域中估计的背景癌症风险是第一阶段的大约1.5倍。在路边区域，包括地面高度和4层高度，道路交通造成的额外癌症风险分别为1.2 x 10〜（-6）和7.1 x 10〜（-7）。另外，在工作日，机动道路使用者的额外风险估计为1.8 x 10〜（-6）。然后，这种方法可以提供一种更简单的方法来评估与人类暴露于pPAHs相关的潜在风险。

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