| The atmospheric particulate matter in China has formed a characteristic of compounding pollution. The fine particulate matter PM2.5 has complex sources. Through an integrated analysis of concentration characteristics of and source apportionment results of PM2.5 in China, the regular pattern is found. The source apportionment results have shown that the main sources of PM2.5 in China are:the burning of coal, the motor vehicle exhaust, dust, secondary particles, the burning of biomass, sea salt particles, etc. Besides, analyses of the sources of PM2.5 are done based on the chemical composition, particular indexes as well as the chemistry-statistics methods, respectively. The recognition of analytical methods of PM2.5 sources will help proposing more measures to reduce PM2.5 emission from the very beginning.Researching on source apportionment of particles in ambient air from petrochemical enterprises is the basis of joint prevention and control of particles. In this paper, through the probe into a certain petrochemical enterprise and its ambient atmospheric particulate samples, analysis is done on the relationship between TSP, PM10 and PM2.5 concentration.Temporal and spatial distribution characteristics are also discussed. Through Pearson correlation analysis of source apportionment featuremarking pollutants, further analysis, say, the sources of particulate matter are also judged. Research shows that, in the ambient atmosphere, particle concentration distribution in time（non-heating period and heating period） and region（distance from petrochemical enterprise） as well as the meteorological conditions（dominant wind direction） all demonstrate prominent differences. And further analysis shows that ambient fine particle proportion is higher, and the Pearson correlation coefficients indicate that the source of each kind of particle may be the same one. Finally, through analysis of correlation coefficients, benzene, NH3, H2 S, methylbenzene and dimethylbenzene can be used as markers. Through the Principal Factor Analysis and Factor Analysis in ambient atmospheric particulate matter, we come to a conclusion that these pollutants mainly come from wastewater treatment plant, catalytic reforming equipment, gasoline pyrolysis equipment the fugitive emission sources.In order to study the contributing units to the atmospheric PM2.5 from the manufacturing process in the petrochemical enterprise, a particular petrochemical enterprise with a capacity of tens of millions ton was studied. Based on the formation mechanisms of PM2.5, the contributing units in the petrochemical enterprise were recognized, including the primary fine particulate matter sources as well as the sources that contributed to the formation of both the organic and the inorganic secondary fine particulate matter. What’s more, it was confirmed that the quality of the oil products in the petrochemical enterprise also had a important influence on the formation of PM2.5. And finally, some emitting-reducing measures of PM2.5 were put forward in accordance with the contributing units found in the petrochemical enterprise, as well as some recommendations on its potential work, in the hope to help tackling the regional PM2.5 complex pollution.In order to put forward feasible measures to tackle the pollution of PM2.5, this paper shed light on the characteristics of fine particle PM2.5, including its sources, chemical composition and its proportion in TSP and PM10, as well as the influences on the environment and human body, in the perspective of the environment impact assessment. Researches on its implementation in Environment Impact Assessment were done also, as well as the advice on its future development, based on their characteristics. Finally, in the perspective of PM2.5 in the discussion of the environment impact assessment, the relative outlook on its prediction and reduction of fine atmospheric particulate was made. |
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