Journal of Korean Society for Atmospheric Environment (한국대기환경학회지)

Korean Society for Atmospheric Environment (한국대기환경학회)
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Impact of Acidification on the Solubility of Metal Species in Asian Desert Dusts: Results from Laboratory Experiments

산성화 과정이 황사입자 내 금속성분의 용해도에 미치는 영향: 실험실 연구결과

  • Sim, Soo-Young (Department of Environmental Engineering, Chonnam National University) ;
  • Park, Seung Shik (Department of Environmental Engineering, Chonnam National University) ;
  • Kim, Deok-Rae (Climate Change Research Division, Climate and Air Quality Research Department, National Institute of Environmental Research) ;
  • Lee, Suk-Jo (Climate Change Research Division, Climate and Air Quality Research Department, National Institute of Environmental Research)
  • 심수영 (전남대학교 환경공학과) ;
  • 박승식 (전남대학교 환경공학과) ;
  • 김덕래 (국립환경과학원 기후변화연구부) ;
  • 이석조 (국립환경과학원 기후변화연구부)
  • Received : 2012.11.06
  • Accepted : 2013.01.29
  • Published : 2013.02.28
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Abstract

Because some particulate matter emission sources may inherently produce soluble species, or some soluble species may be produced during atmospheric transport, it is important to understand the origin of a particles's solubility when water-soluble tracers are used in source apportionment studies. Laboratory experiments were performed on three types of soils (Mongolia grassland, Mongolia desert, and Korean rural soils), to study the impact of acidification by nitric acid vapor on the solubility of metals in the soils. To achieve this goal, concentrations of water-soluble metals (Na, Mg, Al, K, Ca, Mn, and Fe) in the soils measured before and after acidification. Contributions of concentrations of water-soluble metal species before and after acidification attack to their total concentrations varied little with soil type. Concentrations of water-soluble Mg, Al, K, Ca, Mn, and Fe from the soils after interaction with nitric acid vapor increased, with significant increases in soluble Ca and Mn for all soil types suggesting soil acidification enhances the amount of leachable metal species in soil dust. There was little increase in water-soluble Na and K after acidification for each soil type. This experiment demonstrates that quantities of water-soluble metal species in particulate matter are produced under high gaseous nitric acid conditions.

Keywords

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