Establishment Of An Atmospheric Particulate Matter Source Emission Inventory In Changchun And Emission Reduction Measures

With the increasing pace of industrialization and urbanization,the problem of air pollution is becoming increasingly serious worldwide,posing a huge threat to people’s health and the environment.Atmospheric particulate matter,a major component of atmospheric pollution,has become a major environmental problem worldwide.Atmospheric particulate matter not only has a direct impact on air quality,but also has a wide range of impacts on human health,ecosystems,and climate change.Changchun,Jilin Province,a major city in northeast China,with a development pattern dominated by the automotive industry and complemented by industries such as agriculture and pharmaceuticals,is also facing a serious challenge from airborne particulate pollution.Most research is currently limited to long-term monitoring of atmospheric particulate matter,exploring the spatial and temporal patterns of particulate matter,seeking sources of particulate matter,and assessing human health effects.However,the process of analyzing the sources of particulate matter is vague and cannot be precise to the details of particulate matter emissions from different industries and activities,and cannot provide an accurate and detailed scientific basis for environmental protection policies and emission reduction measures by relevant government departments.Therefore,the establishment of an inventory of atmospheric particulate emissions and the formulation of corresponding emission reduction measures are of great significance in providing a scientific understanding of the region’s air pollution situation,guiding the formulation of environmental protection policies,and improving air quality.Given Changchun’s strategic position and the urgency and importance of the problems facing atmospheric particulate emissions and air quality,this study establishes an inventory of atmospheric particulate emissions in Changchun for the period 2017-2020 and proposes emission reduction measures.By establishing an emission inventory,the particulate matter emissions from different industries and sources in the region can be systematically collected and analyzed to provide a reference for the formulation of scientific emission reduction strategies.The main work of this study is as follows:（1）Firstly,the AQI and concentration data of six atmospheric pollutants in Changchun from 2015-2020 were obtained from the China General Environmental Monitoring Station to analyze the changing pattern of atmospheric pollution in Changchun;（2）Secondly,the activities of different industries were classified in terms of point sources,line sources,and surface sources respectively,and an inventory of atmospheric particulate matter emissions in Changchun from 2017 to 2020 was established using the emission factor method and combining statistical yearbooks and literature research data;（3）Finally,in response to the results of the emission inventory,a series of emission reduction measures are proposed with the aim of reducing atmospheric particulate matter emissions in Changchun,improving air quality and safeguarding the health of residents and the quality of their living environment.Based on the above key research elements,the following main conclusions were drawn:（1）The percentage of good AQI levels in Changchun from 2015 to 2020 was58.33%,83.33%,91.67%,100%,91.67%,and 83.33%respectively.the concentrations of NO₂,CO,and SO₂did not exceed the national secondary limit value standard,while particulate matter and O₃pollution were more serious.Particulate matter concentrations were higher in the spring and winter months,mainly due to winter heating and straw burning.The particulate matter exceedance rate dropped from 41.67%to 8.33%,indicating that Changchun has achieved significant results in air pollution prevention and control.（2）The annual emissions of PM_2.5from 2017 to 2020 were calculated by the emission factor method as 260390.99t,213624.19t,252528.22t,and 297741.79t respectively;the annual emissions of PM₁₀were:399884.55t,342974.84t,394807.93t and According to the classification of point,line and surface sources,the sources of particulate matter pollution were divided into five categories of sources,and the size of PM_2.5emissions was calculated as civil sources（55.01±1.45%）,biomass combustion sources（25.01±0.47%）,dust sources（16.46±1.84%）,industrial sources（2.18±0.68%）and mobile sources（1.36±0.16%）;PM₁₀emissions were in order of magnitude from civil sources（44.13±2.01%）,dust sources（33.71±2.61%）,biomass combustion sources（16.36±0.36%）,industrial sources（4.15±1.15%）and mobile sources（1.67±0.17%）.（3）According to the resulting emission inventory,targeted measures should be proposed to reduce airborne particulate matter.In the industrial sector,we should strengthen the regulation of pollutant emissions,promote clean production technologies and improve energy efficiency;in the transport sector,we suggest strengthening vehicle emission standards,controlling diesel vehicle ownership,and promoting the use of electric vehicles;in urban dust management,we should strengthen road cleaning and greening construction and strictly comply with construction dust regulations;in rural agriculture,we should implement centralized heating on a wider scale or For rural agriculture,centralized heating or localized clean heating will be implemented on a larger scale,reducing individual coal burning,promoting the comprehensive use of straw and reducing biomass open burning pollution.This study establishes that atmospheric particulate matter in Changchun will provide a scientific reference for decision-making for the Changchun government,environmental protection departments,and relevant research institutions,and promote the management and control of atmospheric particulate matter pollution,which can promote the development of green technologies and clean energy and the transformation of the sustainable development path in Changchun.By reducing the emission of atmospheric particulate matter,the sustainable development of the environment can be achieved,the ecological quality of Changchun City can be improved and cleaner and healthier living conditions can be created for residents.