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Evaluating PM₂.₅ ionic components and source apportionment in Jinan, China from 2004 to 2008 using trajectory
Shuhui Cheng1, Lingxiao Yang, Xuehua Zhou
1Environment Research Institute, Shandong University, Jinan, 250100, China. chengshuhui@hotmail
Journal of Environmental Monitoring : JEM
|April 21, 2011
Summary
Particulate matter (PM2.5) concentrations in Jinan were among the world's highest. Industrialized Shandong Province was a primary source, with regional transport significantly impacting air quality.
Area of Science:
- Atmospheric Chemistry
- Environmental Science
- Air Pollution Studies
Background:
- PM2.5 mass concentrations and chemical components in Jinan, China, were analyzed between December 2004 and October 2008.
- Annual mean concentrations of PM2.5, sulfate, and nitrate were exceptionally high, among the highest globally.
- Understanding pollutant sources is crucial for effective air quality management.
Purpose of the Study:
- To investigate inter-annual variations in PM2.5 mass and chemical components.
- To evaluate air mass patterns and identify source regions for secondary sulfate and nitrate.
- To assess the impact of emission controls during the 2008 Beijing Olympics.
Main Methods:
- Backward trajectory cluster analysis was employed to understand air mass origins.
- Potential Source Contribution Function (PSCF) model was used to pinpoint source areas.
- Analysis focused on PM2.5, sulfate, and nitrate concentrations and their ratios.
Main Results:
- High PM2.5, sulfate, and nitrate concentrations were observed, with significant contributions from industrialized Shandong Province.
- Sulfate sources were identified in Shandong, Henan, Jiangsu, Anhui, and the Yellow Sea.
- Nitrate levels were influenced by regional and long-range transport of ammonium nitrate (NH4NO3), with higher ratios observed from Beijing and Tianjin.
- Emission controls for the 2008 Olympics showed a reduction in pollution from Beijing and surrounding areas in 2007-2008.
Conclusions:
- Industrial activities in Shandong Province are a major contributor to Jinan's PM2.5 pollution.
- Regional transport plays a significant role in sulfate and nitrate pollution in Jinan.
- Targeted emission control strategies, like those implemented during the Olympics, can effectively reduce pollution from specific source regions.
