Distribution characteristics of polycyclic aromatic hydrocarbons with particle size in urban aerosols at the roadside in Ho Chi Minh City, Vietnam
Distribution characteristics of polycyclic aromatic hydrocarbons with particle size in urban aerosols at the roadside in Ho Chi Minh City, Vietnam
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DOI：
10.1016/j.atmosenv.2006.10.045
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发表时间：
2007-03-01
影响因子：
5
通讯作者：
Bandow, Hiroshi
中科院分区：
文献类型：
--
作者：
Hien, To Thi;Thanh, Le Tu;Bandow, Hiroshi
本研究的目的是研究越南胡志明市路边大气中4-6环多环芳烃(PAHs)的粒度分布。用低压串级撞击仪在2005年旱季和雨季对胡志明市路边大气颗粒物(PM)中的10种多环芳烃(荧菲、芘、三苯、苯并[a]菲、大黄烯、苯并[b]荧菲、苯并[k]荧菲、苯并[a]芘、苯并[高]茂和吲哚[1，2，3-Cd]芘)进行了测定。根据空气动力学直径将PM分为9个组分，即>；9.0、9.0-5.8、5.8-4.7、4.7-3.3、3.3-2.1、2.1-1.1、1.1-0.7、0.7-0.4和<；0.4微米(最终过滤器)。多环芳烃的分析采用高效液相色谱-荧光检测法。多环芳烃总量雨季高于旱季。在两个季节中，粗颗粒物的质量所占比例都高于细颗粒物。多环芳烃总量主要集中在空气动力学直径小于0.4微米的颗粒物中，多环芳烃的粒径分布呈双峰分布，在细颗粒物模式下出现一个峰值(~lt；2.1µm)，在粗颗粒物模式下出现一个峰值(~gt；2.1µm)。一般情况下，5，6环多环芳烃主要以细颗粒为主，4环多环芳烃主要分布在细颗粒和粗颗粒中。(C)2006爱思唯尔有限公司。保留所有权利。
The purpose of this study was to characterize size distributions of atmospheric polycyclic aromatic hydrocarbons (PAHs) with 4-6 rings at the roadside in Ho Chi Minh City, Vietnam. Ten PAHs (fluoranthene, pyrene, triphenylene, benzo[a]anthracene, chrysene, benzo[b]fluoranthene, benzo[k]fluoranthene, benzo[a]pyrene, benzo[ghi]perylene and indeno[1,2,3-cd] pyrene) in atmospheric particulate matters (PM) at the roadside were measured in the dry and rainy seasons in 2005 at Ho Chi Minh City, using a low-pressure cascade impactor. The PM were separated into nine fractions by their aerodynamic diameter, i.e. > 9.0, 9.0-5.8, 5.8-4.7, 4.7-3.3, 3.3-2.1, 2.1-1.1, 1.1-0.7, 0.7-0.4 and < 0.4 mu m (a final filter). PAHs were analyzed by high-performance liquid chromatography with fluorescence detection. Total PAHs measured were higher in the rainy season than in the dry season. The mass of coarse particles occupied a higher fraction than that of fine particles in both seasons. Total PAHs were mainly concentrated in particles with aerodynamic diameter smaller than 0.4 mu m. The particle size distributions of PAHs investigated were bi-modal with a peak in fine particle mode (< 2.1 mu m) and another peak in coarse particle mode (> 2.1 mu m). Generally, 5,6-ring PAHs associated mainly with fine particles and 4-ring PAHs spread out in both fine and coarse particles. (c) 2006 Elsevier Ltd. All rights reserved.