Analysis Of PM_2.5 Source In Chengde City

In recent years,events related with air pollution have been frequently observed in China,and the regional atmospheric environmental problems that characterized with fine particulate matter(PM_2.5)are very severe.Chengde City as the lung of the city in North China,its ecological environment is good.However,with the rapid development of urbanization and industrialization,and the growing regional pollution,air pollution caused by transportation,industrial and agricultural waste gas emission and other factors is also deteriorating.Especially in recent years,the frequent haze weather has caused serious harm to the health and normal life of the people in the city.In this study,the source apportionments of PM_2.5 in different functional areas in Chengde were analyzed by multiple source apportionment methods,according to the characteristics of complex PM_2.5 components and sources and different sources of analytical method.Moreover,the samples from Chinese bank national monitoring points,Railway monitoring points and Chengde Steel Industrial Zone monitoring points were sampled and monitored in one year.The main source of PM_2.5,comprehensive analysis of the contribution of different pollution sources of chengde area,which will provide a scientific basis for PM_2.5.5 pollution control.PM_2.5 results show that the industrial pollution is the main industry in Chengde City,especially metallurgical industry and the power industry.Secondly,the contribution of unorganized emission is higher,the average annual contribution rate of each sampling point is more than 22%,and the unorganized dust source is also one of the important contribution sources of each functional area in Chengde.The comprehensive analysis of the contribution of different pollution sources to PM_2.5 in Chengde area,relevant suggestions for pollution control of PM_2.5.5 are put forward.