期刊
ENVIRONMENTAL ENGINEERING SCIENCE
卷 29, 期 4, 页码 262-269出版社
MARY ANN LIEBERT, INC
DOI: 10.1089/ees.2010.0421
关键词
air pollution control processes; atmospheric chemistry; air quality; haze
资金
- Chinese Academy of Sciences [XMXX280732]
- State Key Joint Laboratory of Environment Simulation and Pollution Control [10K13ESPCT]
A first study of nonmethane hydrocarbons (NMHCs) on hazy and normal days was performed in Foshan for providing deep insight into the local deteriorating air quality. Ethane, propane, i-pentane, ethene, propene, ethyne, benzene, and toluene were eight most abundant compounds, accounting for 71%-85% of total NMHCs. Most hydrocarbons showed much higher levels on hazy days than normal days together with hydrocarbon/ethyne ratios and diurnal variations, indicating hazy days are more dominated by vehicular emission. Correlation coefficients (R-2) of ethane, propane, ethane, propene, benzene, and total NMHCs with ethyne were 0.62-0.83, indicating these compounds are mainly related to vehicular emission. R-2 analysis indicated that solvent usage is responsible for toluene and other aromatic hydrocarbons (e.g., ethylbezene). Benzene/toluene (B/T) ratio was 0.44 +/- 0.23 during whole sampling periods, again indicating vehicular emission is the dominant source. Lower B/T ratio (0.30 +/- 0.14) on hazy days than that (0.58 +/- 0.21) on normal days suggested that solvent usage emitted toluene.
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