کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4434394 | 1619983 | 2006 | 12 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Concentration and chemical characteristics of PM2.5 in Beijing, China: 2001–2002 Concentration and chemical characteristics of PM2.5 in Beijing, China: 2001–2002](/preview/png/4434394.png)
Weekly PM2.5 samples were simultaneously collected at a semi-residential (Tsinghua University) and a downtown (Chegongzhuang) site in Beijing from August 2001 through September 2002. The ambient mass concentration and chemical composition of PM2.5 were determined. Analyses including elemental composition, water-soluble ions, and organic and elemental carbon were performed. The annual average concentrations of PM2.5 were 96.5 μg m−3 and 106.9 μg m−3 at CGZ and HU site, respectively. More than 80% of the PM2.5 mass concentrations were explained by carbonaceous species, secondary particles, crustal matters and trace elements at the two sites. Carbonaceous species were the most abundant components, constituting about 45% and 48% of the total PM2.5 mass concentrations at CGZ and THU site, respectively. SO42−, NO3− and NH4+ were three major ions, accounting for 37%, 23% and 20%, respectively, of the total mass of inorganic water-soluble ions.
Journal: Science of The Total Environment - Volume 355, Issues 1–3, 15 February 2006, Pages 264–275