[Establishment and application of replaceable source profiles of PM10]

In order to establish the replaceable source profile for different regions, the effective source profiles of different source types in 35 cities were collected. The source profiles of the same kind were clustered to the appropriate classes by hierarchical cluster analysis. Variance analysis was used to evaluate the rationality of clustering results that were applied to the regional division of source profile. The replaceable source profiles were established based on the weighting sum of the calculating component scores which were obtained by principal components method. The reasonability and feasibility of the established replaceable source profiles were evaluated using correlation coefficient (R), coefficient of divergence (CD) and relative error (RE) of source contributions apportioned by CMB model between the determined and replaceable source profiles. A total of 13 replaceable source profiles were obtained for six kinds of pollutant sources, including three kinds each of coal fly ash dust and re-suspended dust, two kinds each of soil dust, metal smelt dust and construction cement dust, and one kind of vehicle exhaust dust. The replaceable source profiles of coal combustion fly ash and metal smelt dust could be directly used for source apportionment. There was no obvious regional division for construction cement dust profiles. Source profile of vehicle exhaust dust was suggested to be determined due to the lack of representative source data. More work needs to be done on the replaceable source profiles of soil dust and re-suspended dust.