Figure 3
From: Mineral dust and NOx promote the conversion of SO2 to sulfate in heavy pollution days
Sulfate formation in heterogeneous reactions of NOx and SO2 in the smog chamber.
N50(dry) and N150(dry) represent NO2 concentrations of 50 and 150 ppb in the absence of Al2O3 with a RH of 12%, respectively; N50 represents an NO2 concentration of 50 ppb in the absence of Al2O3 at 50% RH while Al-N50 and Al-N150 represent NO2 concentration of 50 and 150 ppb in the presence of Al2O3 at 50% RH, respectively.
