Abstract:

The PMF model and PCA/APCS model were used to apportion atmospheric VOCs qualitatively and quantitatively in Nanjing, and both results were compared. The results show that the simulation result for the different types’ VOCs by the PMF model significantly differs, while it is similar to each other by the PCA/APCS model. The number of sources apportioned by the PMF model is greater than that by the PCA/APCS model. Both source profiles are similar, while the PCA/APCS model fails to distinguish gasoline evaporation and vehicle exhaust emission. The contributions of plant emission and industrial production apportioned by the two models are close, while those of the other sources differ. The contribution of solvent use is greater for the PCA/APCS model than for the PMF model, while the contribution of gasoline evaporation plus vehicle exhaust is greater for the PMF model than for the PCA/APCS.

Key words: VOCs, Source apportionment, PMF model, PCA/APCS model