Characteristics of PM2.5 pollution components and their sources in Shenyang
TIAN Sha-sha1, ZHANG xian1, BIAN Si-si2, ZHAO Xue-yan3, HAN Bin3, YU Hao4, YIN Bao-hui3, CHEN Li1, BAI Zhi-peng3
1. School of Geography and Environmental Sciences, Tianjin Normal University, Tianjin 300380, China;
2. Shenyang Academy of Environmental Sciences, Shenyang 110167, China;
3. State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;
4. Academy of Water Sciences, Beijing Normal University, Beijing 100875, China
To understand the pollution characteristics and major sources of fine particulate matterin Shenyang city, PM2.5 samples were collected at Shenyang in February, May, August and October in 2015. The mass concentration and component composition of PM2.5 (inorganic elements, carbonaceous species and water-soluble ions) were analyzed. The results showed that the average mass concentration of PM2.5 was 69μg/m3 during the sampling period, which was 1.97 times higher than the standardary limit (35μg/m3) regulated by of Chinese Ambient air quality standards (GB 3095~2012). For instance, the content of water-soluble ions in PM2.5 was the highest, followed by carbon fractions and inorganic elements. The enrichment factor (EF) results showed that the highest EF value elements came from coal burning, traffic pollution and industrial emission. The Positive Matrix Factor (PMF) model showed that the contribution ratios of coal combustion, secondary aerosol, industrial emissions, fugitivedust and traffic emissions in PM2.5 were 33.37%、27.27%、16.68%、11.49% and 11.19%.
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