| Based on the volatile organic compounds (VOCs) data in Qingdao in 2012, the characteristics of VOCs pollution, sources and chemical reactivity were analyzed. The results showed that the concentration of VOCs in Qingdao was lower than other cities, and alkanes were the most abundant component of VOCs, accounting for more than 60%. The total VOCs concentrations in summer and autumn were higher than that in spring and winter, and the monthly variation of VOCs indicated that the higher values occurred in September. The diurnal variation showed an obvious trend of two peaks, corresponding to the morning and evening rush hours. Each component of VOCs showed weekend effect, indicating important impact of vehicle emission and industrial sources, and the correlation analysis of the dominant species further proved it.Compared with the OH consumption rate of these components,alkenes has higher contribution for ozone formation than alkanes and aromatics hydrocarbons. Controlling vehicle emissions, solvent evaporation, fossil industry and other VOCs sources will help to reduce the concentration of ozone in the atmosphere. |
