期刊
ATMOSPHERIC ENVIRONMENT
卷 75, 期 -, 页码 279-286出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.atmosenv.2013.04.023
关键词
Dicarboxylic acids and sugars; Water-soluble organic compounds; Atmospheric aerosol; Waste incineration impact; Regional area
资金
- Moniter project of the Environment Agency of Emilia Romagna region (ARPAER)
The composition and seasonal variations of water-soluble organic compounds, including 18 dicarboxylic acids and 7 sugars, were determined in the atmospheric aerosol in the surroundings of Bologna, Northern Italy, during intensive summer and winter campaigns. In both seasons the most abundant compound is levoglucosan, as the major by-product from biomass burning. The abundances of dicarboxylic acids exhibit a seasonal pattern with higher winter concentrations (mean total concentrations are 60 ng m(-3) and 23 ng m(-3), in winter and summer, respectively). The distribution profiles and the diagnostic ratios of these markers allowed to estimate the contribution of primary emission sources (power plants, vehicular circulation, biomass burning) associated with secondary constituents from both biogenic and anthropogenic precursors. The distinct seasonal pattern of abundances suggests, overall, the dominant role of secondary formation of particulate organics in summer, and the highest strength of primary emissions in winter. (C) 2013 Elsevier Ltd. All rights reserved.
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