Comparison of particle-phase polycyclic aromatic hydrocarbons and their variability causes in the ambient air in Ho Chi Minh City, Vietnam and in Osaka, Japan, during 2005-2006
Comparison of particle-phase polycyclic aromatic hydrocarbons and their variability causes in the ambient air in Ho Chi Minh City, Vietnam and in Osaka, Japan, during 2005-2006
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DOI：
10.1016/j.scitotenv.2007.04.013
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发表时间：
2007-08-15
影响因子：
9.8
通讯作者：
Hiroshi, Bandow
中科院分区：
文献类型：
--
作者：
Hien, To Thi;Nam, Pham Phuong;Hiroshi, Bandow
2005 - 2006年，对越南胡志明市和日本大坂市大气颗粒物中多环芳烃（PAHs）进行了比较研究。本研究的目的是调查11种多环芳烃的环境水平，排放源，季节变化和健康风险在这两个城市，特别是胡志明市，空气污染正成为一个严重的问题。结果表明，胡志明市TSP和总PAHs浓度显著高于大坂市。胡志明市TSP样品中5环和6环多环芳烃（BeP、BbF、BkF、Bal、BghiP和InP）的含量明显高于大坂市，分别占总多环芳烃的82%和5.1%。已知这些多环芳烃对人类具有高度致癌性和致突变性。机动车尾气是两市多环芳烃的主要污染源之一。摩托车和汽油汽车是胡志明市PAHs的主要排放源，而柴油汽车是大坂市的主要排放源。在这项研究中观察到的多环芳烃的季节变化，高浓度的多环芳烃被发现在雨季（5月至12月）和较低的浓度对应于旱季（2月至4月）在胡志明市，而较高的浓度的多环芳烃在冬季（11月至1月）在大坂。日照时数是影响胡志明市PAHs季节变化的重要气象因子，而温度是影响大坂市PAHs季节变化的主要因子。胡志明市环境空气中5环和6环多环芳烃的BaP当量浓度很高，这是一个对人类健康和环境质量有害的警报信号。(C)2007 Elsevier B. V.保留所有权利。
A comparative study of polycyclic aromatic hydrocarbons (PAHs) associated with particulate matter (TSP) in the ambient air in an urban area in Ho Chi Minh City, Vietnam and in Osaka, Japan was carried out from 2005 to 2006. The objective of this study was to investigate the environmental levels, emission sources, seasonal variations and health risk of eleven PAHs in the two cities, especially Ho Chi Minh City where air pollution is becoming a serious concern. The results showed that the concentrations of TSP and total PAHs were significantly higher in Ho Chi Minh City than levels in Osaka. The concentrations of 5- and 6-ring PAHs (BeP, BbF, BkF, Bal, BghiP and InP) were much higher in TSP samples in Ho Chi Minh City than in Osaka, accounting for 82% and 5.1% of total PAHs, respectively. These PAHs are known to be highly carcinogenic and mutagenic in humans. Vehicular emission is suggested as one of the main pollution sources of PAHs in both cities. Motorcycles and gasoline automobiles are suggested as the main emission sources of PAHs in Ho Chi Minh City, whereas diesel automobiles are the primary source in Osaka. Seasonal variations of PAHs were observed in this study; higher concentrations of PAHs were found in the rainy season (May-December) and lower concentrations corresponded to the dry season (February-April) in Ho Chi Minh City, while higher concentrations of PAHs were observed in the winter (November-January) in Osaka. The number of sunshine hours was an important meteorological factor affecting seasonal variations of PAHs in Ho Chi Minh City, while the temperature was a main factor causing the variations of PAHs in Osaka. The high BaP equivalent concentration of 5- and 6-ring PAHs even in the ambient air is an alarming signal for harmfulness to human health and environmental quality in Ho Chi Minh City. (C) 2007 Elsevier B.V. All rights reserved.