Analysis of Air Pollutant concentration change trend in Urumqi city under the condition of city closed in winter

Haizhen Zhang,Jiang Wei,R Weerasinghe,C Fang

doi:10.1051/e3sconf/202123701037

Abstract

During the epidemic period, Urumqi has been sealed off from the city’s management, just as “suspended” state.From an environmental point of view, the reduction of energy consumption during the closure of the city can be considered as an energy control to study the resulting reduction of atmospheric pollutant concentration changes.In this paper, the monitoring data of air pollutant concentration in the same period of city closure and normal years are compared, and the results show that the air pollutant concentration has decreased in different degrees during the period of city closure.The largest decrease was44.66% for NO2, -40.13% for CO, -36.44% for PM2.5, and the smallest was-2.06% for SO2.Multivariate analysis of variance showed that energy control had a significant effect on the concentration of pollutants during the city closure, for example NO2 (F=128.96, Sig.=0.000), PM10 (F=29.58, Sig=0.000), PM2.5 (F=13.98, Sig.=0.000), CO(F=46.34;Sig.=0.000). Through the analysis of the data, it can be concluded that the air quality of Urumqi in winter is poor and the concentration of pollutants is high. The energy control during the closing period played a positive role in pollutant emission reduction and effectively improved the quality of atmospheric environment.

Highlights

The formation and development of a city is a process in which all kinds of factors, such as human flow and material flow, gather together in a certain region, and it is a dense area of human life and production.When the concentration of pollutants discharged into the atmosphere in the process of human life and production exceeds the threshold of the atmospheric environmental capacity in the region, the problem of atmospheric environmental pollution arises.This has become a common problem in many large and medium-sized cities, especially in developing countries with relatively backward economies
Other social production and living activities were "suspended" except those related to the national economy and the people's livelihood.This is an extremely disadvantageous state for economic and social development, but it provides a rare opportunity for environmental research.In this paper, we compare the monitoring data of air pollutant concentration in the same period of epidemic time and in the normal state, and discuss the air pollutant that the city life releases to the air environment
3.1 Changes in environmental quality The statistics show that the environmental quality has improved significantly during the period of the city closure, with the I-class days appearing in different areas, the number of days of II environmental quality has increased significantly, with 142% in the south area, 75% in the middle area, and 44.44% at the lowest in the north area

Summary

Introduction

The formation and development of a city is a process in which all kinds of factors, such as human flow and material flow, gather together in a certain region, and it is a dense area of human life and production.When the concentration of pollutants discharged into the atmosphere in the process of human life and production exceeds the threshold of the atmospheric environmental capacity in the region, the problem of atmospheric environmental pollution arises.This has become a common problem in many large and medium-sized cities, especially in developing countries with relatively backward economies. Other social production and living activities were "suspended" except those related to the national economy and the people's livelihood.This is an extremely disadvantageous state for economic and social development, but it provides a rare opportunity for environmental research.In this paper, we compare the monitoring data of air pollutant concentration in the same period of epidemic time (energy control) and in the normal state, and discuss the air pollutant that the city life releases to the air environment

Results

Discussion

Conclusion