Atmospheric Dry Deposition Fluxes of Metallic Pollutants in Asia During 1997–2006

Numerous studies have monitored deposition velocity and dry deposition fluxes in Asia throughout the recent decade. This study compares different sample collections, pretreatments, and analytical methods utilized throughout the past decade in Asia. Analytical results suggest that the primary dry deposition sources are traffic and soil exhaust. This study also elucidates the sources, analytical tools, and the average concentrations in the Asian region for dry deposition and related metallic elements during 1997–2006. The order of metallic elements in average dry deposition fluxes in Asia was established as: Na > K > Mg > Fe > Ca > Zn > Pb > Mn > Cl > Cu > Cd > Cr, and in average atmospheric concentrations the order was observed as: Ca > Cl > Na > Fe > Mg > K > Zn > Cu > Pb > Mn > Cr > Cd. The order of metallic elements in average deposition velocity in Asia was Fe > Zn > Cd > Ca > Mn > Pb > Cr > Cu > Mg > Na > Cl > K.