| Based on the energy structure,industrial layout,meteorological conditions and urban development planning of Fuxin urban area,taking atmospheric particulates of Fuxin urban area as the research object,taking sample and analysising on TSP(Total suspended particulate)and PMs of 4 sampling points in Fuxin urban area,with the help of the corresponding PM2.s(Fine particulate matter)concentration monitoring data of Fuxin Municipal Environmental Protection Bureau,the research analyzes the temporal and spatial distribution characteristics of three kinds of particle mass concentration,the correlation between the mass concentrations of the three particles,temporal and spatial distribution characteristics of metal elements,uses the enrichment factor method(EF)and principal component analysis(PCA)to analyze the sources of atmospheric particulates in Fuxin urban area,based on the actual situation of Fuxin urban area and the characteristics of atmospheric particulates pollution and its source,the research puts forward some suggestions and measures for the prevention and control of atmospheric particulates in Fuxin urban area,and provides theoretical basis and data support for the effective control of atmospheric particulate pollution in Fuxin urban area.The research on the mass concentration of atmospheric particulates in Fuxin urban area is analyzed,the study finds that PM5 and PM2.5 average concentration distribution in space and time are in the same general trend,The correlations between TSP and PM5,TSP and PM2.5 are weak,but the correlation between PM5 and PM2.5 is better,the correlation coefficient is 0.8251,and the average value of PM2.5/PM5 in the urban area of Fuxin was 0.597,PM2.5 accounts for a large proportion of PMs,which is a major component of PMs.Through the analysis of the content of metal elements in atmospheric particulates,it is found that most of the metal elements of TSP and PM5 in the main campus of Liaoning Technical University are mostly crustal elements,while the other 3 regions of TSP and PM5's metal elements are mostly come from man-made sources.The seasonal variation of TSP metal elements content in the urban area of Fuxin is higher in summer and winter than that in autumn,and lowest in spring,the metal elements content of PM5 in winter was higher than that in autumn,while lowest in spring and summer.Based on the analysis of the enrichment situation of metal elements in atmospheric particulates,it is concluded that the TSP metal elements in Fuxin urban area mainly come from the soil dust,vehicle emission source,and coal combustion source,the pollution of the Municipal Environmental Protection Bureau is more serious.PMs metal elements mainly originated from soil dust,vehicle emission,coal combustion source,building dust source,the Regional Meteorological Bureau's pollution is more serious.Construction dust source and biomass burning source are contributed to PM5 more than TSP.Using the method of PCA to analysis metal element source,it is showed that 3 main components were extracted from metal elements of TSP in Fuxin urban area,the cumulative contribution rate was 85.870%,mainly derived from road dust source which is maily from soil dust and vehicle emission,construction dust source,combustion source which is maily from biomass burning and coal-fired sources.3 principal components are extracted from the metal element of PM5 in Fuxin urban area,the cumulative contribution rate was 84.508%,mainly derived from the fossil fuel combustion source,urban dust source which is based on soil dust,construction dust and motor vehicle emissions,biomass combustion source.That conclusion is basically consistent with the conclution of the enrichment factor analysis method.Given the good correlation between PM2.5 and PM5 in Fuxin urban area,they can be considered as the same source. |
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