Abstract
Air pollution has become one of the important concerns of environmental pollution in the Beijing–Tianjin–Hebei region. As an important city in Beijing–Tianjin–Hebei, Shijiazhuang has long been ranked in the bottom ten in terms of air quality in the country. In order to effectively grasp the influencing factors and current distribution of air pollution in Shijiazhuang City, this paper collects data on the top air pollutants in Shijiazhuang from 2017 to 2019, analyzes the characteristics of time changes in the region, and uses the Kriging interpolation method to affect the air pollutants in this area. The spatial distribution characteristics are studied. The results show (1) From 2017 to 2019, the environmental quality of Shijiazhuang City showed a decreasing trend except for O3. (2) Seasonal changes show that NO2, PM2.5, and CO show as winter > autumn > spring > summer, PM10, SO2 show as winter > spring > autumn > summer, and O3 concentration changes as summer > spring > autumn > winter. (3) The daily change trends of NO2, SO2, PM10 and PM2.5 are similar, while the change trends of O3 and NO2 are opposite. (4) The correlations between air quality index (AQI) and concentrations suggest that PM10, PM2.5, and CO contribute the most to undesirable pollution levels in this area, while NO2, SO2, and O3 contribute less to undesirable pollution. We have concluded that the particulate pollution in Shijiazhuang City has been effectively controlled, thanks to the relevant measures introduced by the government, but the O3-based compound pollution is gradually increasing, so particulate pollution and O3 pollution need to be treated together. The research results of this article have important practical significance for urban or regional air environment monitoring and prevention.
Highlights
31.00 μg/m3, 21.45 μg/m3, and 16.13 μg/m3 ; NO2 concentration changed to 50.22 μg/m3, 44.12 μg/m3, and 42.51 μg/m3 ; O3 changed to 58.12 μg/m3, 62.98 μg/m3, and 65.58 μg/m3 ; carbon monoxide (CO) change is 1.33 mg/m3, 1.21 mg/m3, and 1.01 mg/m3 ; PM2.5 change is 81.85 μg/m3, 70.64 μg/m3, and 60.67 μg/m3 ; PM10 The changes are 153.00 μg/m3, 132.77 μg/m3, and
The peak of pollutants mostly occurs during the period at 9:00–10:00 in the morning, and the concentration value gradually decreases to the lowest in the day in the afternoon, and gradually rises after 18:00, showing periodic changes. This change is related to geographical location, meteorological conditions, pollutant emissions, and human life
The air quality index (AQI) index has been declining year by year, and compared with 2017, it has dropped by 18.3% in 2019
Summary
With the rapid development of China’s social economy, the continuous acceleration of urbanization and the increase of energy consumption, the threat of urban air pollution to the public living environment and physical and mental health has become increasingly prominent [1,2,3,4,5], and it has become more and more concerned and researched hot issues. Studies have pointed out that China’s population-weighted average fine particulate matter (PM2.5 ) concentration is the highest among the 10 most populous countries in the world, and it increased significantly from 1990 to 2010 [6]. Epidemiological studies have shown that particulate matter (PM10 and PM2.5 ) and some gaseous pollutants (CO, SO2 , NO2 , and O3 ) can cause respiratory infec-. China’s air pollution problem has attracted more and more attention from the government and researchers
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