한국환경과학회지 (Journal of Environmental Science International)

  • 제29권1호
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  • Pages.79-93
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  • 2020
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  • 1225-4517(pISSN)
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  • 2287-3503(eISSN)
한국환경과학회 (The Korean Environmental Sciences Society)
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제주지역 도로변 대기 중 에어로졸의 입경별 조성특성

Composition of Size-Segregated Atmospheric Aerosol Collected at an Urban Roadside Environment in Jeju Area

  • 허철구 (제주대학교 환경공학과) ;
  • 김수미 (제주특별자치도 보건환경연구원 대기환경과) ;
  • 이기호 (제주대학교 환경공학과)
  • Hu, Chul-Goo (Department of Environmental Engineering, Jeju National University) ;
  • Kim, Su-Mi (Air Environmental Division, Jeju Special Self-Governing Province Research Institute of Health & Environment) ;
  • Lee, Ki-Ho (Department of Environmental Engineering, Jeju National University)
  • 투고 : 2019.11.19
  • 심사 : 2019.12.17
  • 발행 : 2020.01.31
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초록

To determine the size distributions of water-soluble inorganic ionic species (WSIS) in roadside aerosols, sampling experiments were carried out in the urban roadside area of Jeju City on August 2018 and January 2019 by using the eight-stage cascade impactor sampler. The mass of roadside aerosols were partitioned at 57% in fine fraction, 36-37% in coarse fraction, and 6-7% in giant fraction, regardless of summer and winter. The mass concentrations of WSIS except for Na+ and SO42- in roadside aerosols were higher in winter than in summer. The size distributions of Na+, Mg2+, Ca2+ and Cl- were characterized by bimodal types with coarse particle mode peaking around 3.3-4.7 ㎛ and 5.8-9.0 ㎛. The size distributions of NO3- and K+ shifted from a single fine mode peaking around 0.7-1.1 ㎛ in winter to bimodal and/or trimodal types with peaks around coarse mode in summer. SO42- and NH4+ showed a single fine mode peaking around 0.7-1.1 ㎛. The MMAD of roadside aerosols was lower than that of Na+, Mg2+, Ca2+ and Cl-. Based on the marine enrichment factors and the ratio values of WSIS and the corresponding value for sea water, the composition of roadside aerosols in Jeju City may be practically affected by terrestrial sources rather than marine source.

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