Author(s)

Xiaoxia Xu, Lijun Chen

Corresponding Author

Xiaoxia Xu

Abstract

According to the air quality monitoring data of Zhangye city from 2015 to 2018, the current situation and change trend of environmental air quality in Zhangye city are systematically analyzed, and the causes of pollution are analyzed, and the corresponding countermeasures and suggestions are put forward in combination with the reality. The results show that the annual average concentration values of SO2 and NO2 are in line with the second-level standard of environmental air quality standard (GB3095-2012) from 2015 to 2018. The annual average concentration of PM10 exceed the second-level standard of environmental air quality standard (GB3095-2012) from 2015 to 2018. The annual average concentration of PM2.5 exceed the second-level standard of environmental air quality standard (GB3095-2012) except 2017.The major pollutants in the urban environmental air quality in Zhangye city from 2015 to 2018 are inhalable particulate matter, which has the highest pollution sharing rate. The concentration of pollutants in Zhangye city showed obvious seasonal characteristics from 2015 to 2018, which was the most polluted in the first quarter and the least polluted in the third quarter. The comprehensive air pollution index in heating period was significantly higher than that in non-heating period.

Keywords

Air quality; Change trendence; Zhangye