Atmospheric metals usually reside in aerosols with complex source origins. The concentrations distribution of metals especially for those with high toxicity (Pb, Cd, Ni, V) should be informative for assessing the health effects.
Source apportionment studies can link the atmospheric species with source emissions, and the results can support the policy designing for pollution control. Therefore, to determine the pollution levels of heavy metals and quantify their origins should be an essential part for health risk management.
Usually, the source apportionment include three different methods, i.e., inventories-based, chemical transport model-based and receptor-based. For those studies for identifying the source origins of atmospheric metals, receptor models were the dominant method, and CTM models were seldom adopted. Therefore, I want to ask the difficulties of simulating atmospheric metals in different aspects.
I come up with one reason:
- The source origins of atmospheric were complex with anthropogenic, and natural sources all affected. Therefore, building the source inventories for those metals were challenging.
Is there any other issues counted in the simulation work. Any comments or recommended material would be highly appreciated.