Sources and characteristics of carbonaceous aerosol in two largest cities in Pearl River Delta Region, China

Jingchun DUAN, Jihua TAN, Dingxi CHENG, Xinhui BI, Wenjing DENG, Guoying SHENG, Jiamo FU, Ming Hung WONG

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150 Citations (Scopus)

Abstract

PM2.5 samples were collected at five sites in Guangzhou and Hong Kong, Pearl River Delta Region (PRDR), China in both summer and winter during 2004–2005. Elemental carbon (EC) and organic carbon (OC) in these samples were measured. The OC and EC concentrations ranked in the order of urban Guangzhou > urban Hong Kong > background Hong Kong. Total carbonaceous aerosol (TCA) contributed less to PM2.5 in urban Guangzhou (32–35%) than that in urban Hong Kong (43–57%). The reason may be that, as an major industrial city in South China, Guangzhou would receive large amount of inorganic aerosol from all kinds of industries, however, as a trade center and seaport, urban Hong Kong would mainly receive organic aerosol and EC from container vessels and heavy-duty diesel trucks. At Hong Kong background site Hok Tsui, relatively lower contribution of TCA to PM2.5 may result from contributions of marine inorganic aerosol and inland China pollutant. Strong correlation (R²=0.76–0.83) between OC and EC indicates minor fluctuation of emission and the secondary organic aerosol (SOA) formation in urban Guangzhou. Weak correlation between OC and EC in Hong Kong can be related to the impact of the long-range transported aerosol from inland China. Averagely, secondary OC (SOC) concentrations were 3.8–5.9 and 10.2–12.8 μg m−3, respectively, accounting for 21–32% and 36–42% of OC in summer and winter in Guangzhou. The average values of 4.2–6.8% for SOA/ PM2.5 indicate that SOA was minor component in PM2.5 in Guangzhou. Copyright © 2006 Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)2895-2903
JournalAtmospheric Environment
Volume41
Issue number14
DOIs
Publication statusPublished - May 2007

Citation

Duan, J., Tan, J., Cheng, D., Bi, X., Deng, W., Sheng, G., . . . Wong, M. H. (2007). Sources and characteristics of carbonaceous aerosol in two largest cities in Pearl River Delta Region, China. Atmospheric Environment, 41(14), 2895-2903. doi: 10.1016/j.atmosenv.2006.12.017

Keywords

  • PM₂.₅
  • Organic carbon
  • Elemental carbon
  • Urban aerosol

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