Characterization of PM2.5-bound nitrated and oxygenated PAHs in two industrial sites of South China

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• 作者：Shilong Wei^a ; ^b ; ^{weishilong2008@163.com} ; Bo Huang^a ; ^b ; Ming Liu^a ; ^b ; Xinhui Bi^a ; ^{bixh@gig.ac.cn} ; Zhaofang Ren^a ; ^b ; Guoying Sheng^a ; Jiamo Fu^a ; ^c
• 关键词：PAHs ; Nitro-PAHs ; Oxy-PAHs ; Seasonal variation ; Diurnal variation ; PM2.5
• 刊名：Atmospheric Research
• 出版年：2012
• 出版时间：June, 2012
• 年：2012
• 卷：109-110
• 期：Complete
• 页码：76-83
• 全文大小：593 K

文摘

Daytime and nighttime PM2.5 samples were collected between August 5 and 16, 2009 and between January 24 and February 4, 2010 in an industrial complex site (site A) and an e-waste recycling site (site B) to determine the seasonal and diurnal variations of nitrated (nitro-) and oxygenated (oxy-) polycyclic aromatic hydrocarbons (PAHs) with gas chromatography/mass spectrometry (GC/MS). The two sites show similar composition for nitro- and oxy-PAHs although the composition of parent PAHs was quite different. 3 + 2-Nitrofluoranthene (3 + 2NFL) was the most abundant nitro-PAH, while 9,10-anthraquinone (Anquin), benzanthrone (Bzone) and 6H-benzo[cd]pyrene-6-one (Bpone) were the three major oxy-PAHs species. The concentrations of ¦²nitro-PAHs and ¦²oxy-PAHs were about 2-3 orders of magnitude lower than those of ¦²parent PAHs. Most of the nitro- and oxy-PAHs show notable seasonal variation. 7-Nitrobenz[a]anthracene (7NBaA), Bzone and benzo[a]anthrancene-7,12-dione (Bzdion) demonstrated a pronounced diurnal variation. The occurrence of nitro- and oxy-PAHs in the two sites can be accounted by direct emission and atmospheric secondary formation.