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| Analysis of PM2.5 pollution characteristics and sources in the plain counties of Hebei south-central |
| Lv Xiaojuan1, Li Shuyan2 |
| 1. Hebei Province Weixian Meteorological Bureau, Xingtai 054700, China; 2. The First Geological Team, Hebei Provincial Bureau of Geology and Mineral Resources Exploration and Development, Handan 056001, China |
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Abstract Using environmental quality data and meteorological data from national control stations in the main urban area of a county in Hebei Province from January 2015 to December 2016, study the characteristics of PM2.5 mass concentration changes. Using nationally controlled monitoring points as receptors, the sources of PM2.5 using the AERMOD model were analyzed. The results indicated that : in 2016, PM2.5 emissions were 2 903 t, down by 41.31% in 2015, compared with 4 946 t in the same period; 2016 PM2.5 daily average mass concentration is 81.04±91.54 μg/m3, Compared with 2015(117.40 + 80.65 μg/m3 ) decreased by 30.97%; From the point of view of the correlation between PM2.5 and SO2, NO2, CO, O3, PM10, PM2.5 and CO have the highest correlations. PM2.5 is less correlated with humidity and atmospheric pressure; PM2.5 is negatively correlated with wind speed and temperature, R2 is 0.681 and 0.721 respectively. AERMOD results show that the contribution rate of pollution sources was followed by civil sources > industrial sources > road sources > construction sources in 2015; in 2016, it was followed by civil sources > road sources > industrial sources > construction sources.
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