Study on Dry Deposition of SO2-NOX onto Loess.

In order to obtain information on dry deposition of SO₂ onto loess in China, the effects of water vapor and NO₂ on SO₂ deposition-oxidation processes were investigated in laboratory measurements. The deposition velocities of SO₂ onto loess particles were 2.34–7.33 cm s^-1, were high in comparison with the other studies. Deposition of SO₂ onto the particles was decreased with exposed time and amounts of SO₂, but was influenced by adsorption of water vapor onto the particles. On the other hand, oxidation of SO₂ physically8 adsorbed was promoted by the coexistence of water vapor and NO₂. So, it was indicated that it was possible for water vapor and NO₂ in the atmosphere to play an important role in dry deposition for the deposition-oxidation interaction between SO₂ and loess particles. [ABSTRACT FROM AUTHOR]