Environmental Chemistry

ISSN 0254-6108

CN 11-1844/X

Vol. 38 No. 5
May  2019
Article Contents

Citation:

Variation characteristics of atmospheric pollutants in the urban area of Hohhot

  • Received Date: 2018-11-11
    Fund Project:

    Supported by the Inner Mongolia University Training Program of Innovation and Entrepreneurship for Undergraduates (201817402), National Natural Science Foundation of China(21866022, 21567018) and Inner Mongolia Natural Science Foundation(2017MS0214).

  • Based on the data of CO, NO2, SO2, O3, PM10 and PM2.5, the temporal and spatial variation of atmospheric pollutant concentration was studied in the urban area of Hohhot using cluster analysis and correlation analysis. The results showed that the pollution of PM10, PM2.5 and O3 were much more serious in 2017, and the days of exceeding allowable limit were 49 d, 52 d and 41 d, respectively. Carbon monoxide and sulphur dioxide pollution were generally light. The concentrations of CO, NO2, SO2 and PM2.5 showed lower in winter and higher in summer. O3 corcentration showed lower in summer and higher in winter. PM10 showed higher in spring and winter, and lower in summer and autumn. Both O3 and NO2 showed the single-peak daily change characteristics, and the trend was opposite. CO, SO2 and PM2.5 all showed similar bipolar daily changes. Correlation analysis showed that O3 concentration was positively correlated with temperature. PM2.5 was significantly positive correlation with humidity. CO, NO2 and SO2 all showed significantly negative correlation with wind speed. PM10 had different correlations with various meteorological factors in different seasons.
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Variation characteristics of atmospheric pollutants in the urban area of Hohhot

  • School of Ecology and Environment, Inner Mongolia University, Hohhot, 010021, China
Fund Project:  Supported by the Inner Mongolia University Training Program of Innovation and Entrepreneurship for Undergraduates (201817402), National Natural Science Foundation of China(21866022, 21567018) and Inner Mongolia Natural Science Foundation(2017MS0214).

Abstract: Based on the data of CO, NO2, SO2, O3, PM10 and PM2.5, the temporal and spatial variation of atmospheric pollutant concentration was studied in the urban area of Hohhot using cluster analysis and correlation analysis. The results showed that the pollution of PM10, PM2.5 and O3 were much more serious in 2017, and the days of exceeding allowable limit were 49 d, 52 d and 41 d, respectively. Carbon monoxide and sulphur dioxide pollution were generally light. The concentrations of CO, NO2, SO2 and PM2.5 showed lower in winter and higher in summer. O3 corcentration showed lower in summer and higher in winter. PM10 showed higher in spring and winter, and lower in summer and autumn. Both O3 and NO2 showed the single-peak daily change characteristics, and the trend was opposite. CO, SO2 and PM2.5 all showed similar bipolar daily changes. Correlation analysis showed that O3 concentration was positively correlated with temperature. PM2.5 was significantly positive correlation with humidity. CO, NO2 and SO2 all showed significantly negative correlation with wind speed. PM10 had different correlations with various meteorological factors in different seasons.

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