Study on Dry Deposition of SO_2-NO_X onto Loess

Authors: Sorimachi A.¹; Sakai M.¹; Ishitani O.¹; Nishikawa M.²; Sakamoto K.³

Source: Water, Air, and Soil Pollution, Volume 130, Numbers 1-4, August 2001 , pp. 541-546(6)

Publisher: Springer

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Abstract:

In order to obtain information on dry deposition of SO_2 onto loess in China, the effects of water vapor and NO_2 on SO_2 deposition-oxidation processes were investigated in laboratory measurements. The deposition velocities of SO_2 onto loess particles were 2.34–7.33 cm s^−1, were high in comparison with the other studies. Deposition of SO_2 onto the particles was decreased with exposed time and amounts of SO_2, but was influenced by adsorption of water vapor onto the particles. On the other hand, oxidation of SO_2 physically8 adsorbed was promoted by the coexistence of water vapor and NO_2. So, it was indicated that it was possible for water vapor and NO_2 in the atmosphere to play an important role in dry deposition for the deposition-oxidation interaction between SO_2 and loess particles.

Keywords: dry deposition; loess particles; sulfur dioxide; water vapor; nitrogen dioxide

Language: English

Document Type: Regular paper

Affiliations: 1: Graduate School of Science and Engineering, Saitama University, 255 Shimo-ohkubo, Urawa, Saitama, 338-8570 Japan 2: National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki, 305-0053 Japan 3: Graduate School of Science and Engineering, Saitama University, 255 Shimo-ohkubo, Urawa, Saitama, 338-8570 Japan e-mail:sakakazu@kan.engjm.saitama-u.ac.jp

Publication date: 2001-08-01