Airborne polycyclic aromatic hydrocarbons (PAH) in Bangkok urban air: Part II. Level and distribution
Airborne polycyclic aromatic hydrocarbons (PAH) in Bangkok urban air: Part II. Level and distribution
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DOI：
10.1080/10406630108033065
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发表时间：
2001-01-01
影响因子：
2.4
通讯作者：
Reutergardh, LB
中科院分区：
文献类型：
--
作者：
Garivait, H;Polprasert, C;Reutergardh, LB
使用 8 级尺寸分级级联冲击器（Andersen“低容量”采样器）和用于样品收集的下游 XAD-2 吸附管，研究了曼谷城市空气中空气中 PAH 的气体颗粒分配和粒径分布。九种多环芳烃被列为致癌和共致癌化合物：芘（PYR）、苯并（a）蒽（BaA）、苯并（e）芘（BeP）、二苯并（a,c）蒽（DBacA）、苯并（k）荧蒽（BkF）、苯并（a）芘（BaP）、二苯（a,h）蒽(DBahA)、苯并(ghi)苝(BghiP) 和三甲基胆蒽(3MC) 进行了定量。较低分子量 (MW) 的 PAH，如 PYR、BeP 和 BaA 主要存在于气相中（分别为 80%、40% 和 24%），而较高分子量的化合物几乎完全存在于颗粒部分中。结果表明，按质量计，每种多环芳烃的 30%-60% 存在于小于 0.43 微米的颗粒上，70% 以上存在于直径小于 2.1 微米的颗粒上。此外，还确定了颗粒/气体分配系数（K-p）与过冷液体蒸气压（p 度（L））之间的关系，以描述这些 PAH 化合物在热带大气中的气体-颗粒分配。
The gas-particle partitioning and particle size distributions of airborne PAH in Bangkok urban air were investigated using an 8 stage size fractionating cascade impactor (Andersen "low volume" sampler) and a downstream XAD-2 adsorbent tube for sample collection. Nine PAH classified as carcinogenic and co-carcinogenic compounds-Pyrene (PYR), Benz(a)Anthracene (BaA), Benzo(e)Pyrene (BeP), Dibenz(a,c)Anthracene (DBacA), Benzo(k)Fluoranthene (BkF), Benzo(a)Pyrene (BaP), Dibenz(a,h)Anthracene (DBahA), Benzo(ghi)Perylene (BghiP) and Trimethylcholanthrene (3MC)-were quantified. The lower molecular weight (MW) PAH such as PYR, BeP and BaA were present mainly in the gaseous phase (80%, 40% and 24%, respectively) while higher MW compounds were present almost totally in the particulate fraction. The results show that 30%-60% of each PAH by mass were found on particles smaller than 0.43 mum and more than 70% on particles with diameter less than 2.1 mum. In addition, the relationship between the particle/gas partition coefficient (K-p) and the sub-cooled liquid vapor pressure (p degrees (L)) was also determined to describe the gas-particle partitioning of those PAH compounds in a tropical atmosphere.