Chemical Compositions in PM2.5 and Its Impact on Visibility in Summer in Pearl River Delta, China

Aerosol samples of PM2.5 were collected simultaneously at 6 sites from five cities (Guangzhou urban, Conghua (suburban of Guangzhou), Foshan, Dongguan, Shenzhen and Zhubai) in Pearl River Delta region during the summer of 2010. The concentrations of organic carbon (OC), elemental carbon (EC) and wat...

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Bibliographic Details
Published inHuanjing kexue Vol. 36; no. 8; p. 2758
Main Authors Yang, Yi-hong, Qu, Qun, Liu, Sui-xin, Li, Xiong, Zhong, Pei-yi, Tau, Jun
Format Journal Article
LanguageChinese
Published China 01.08.2015
Subjects
Aerosols - analysis
Air Pollutants - analysis
Carbon - analysis
China
Cities
Environmental Monitoring
Ions
Light
Particulate Matter - analysis
Seasons
China
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Summary:Aerosol samples of PM2.5 were collected simultaneously at 6 sites from five cities (Guangzhou urban, Conghua (suburban of Guangzhou), Foshan, Dongguan, Shenzhen and Zhubai) in Pearl River Delta region during the summer of 2010. The concentrations of organic carbon (OC), elemental carbon (EC) and water-soluble ions were determined by thermal/optical carbon analyzer and ion chromatography, respectively. The characteristics of PM2, OC, EC and ions, spatial distribution were discussed. Moreover, ambient light extinction coefficients were reconstructed by IMPROVE formula. The results showed that spatial distribution characteristics of PM2.5. and its chemical compositions were obviously different. The PM2.5 in Guangzhou, Foshan and Dongguan were higher than those in Zhuhai and Shenzhen. The contributions of (NH4)2SO4, OM, EC and NH4NO3 to ambient light extinction coefficient were 39%, 31%, 12% and 13%, respectively.
ISSN:0250-3301
DOI:10.13227/j.hjkx.2015.08.005