Journal of Korean Society of Occupational and Environmental Hygiene (한국산업보건학회지)

Korean Industrial Hygiene Association (한국산업보건학회)
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Characteristics of Size-segregated Mass Concentrations of Indoor Aerosol Particles in University Buildings

대학건물 실내 에어로졸입자의 입경별 질량농도 특성

  • Suh, Jeong-Min (Department of Bio-Environmental Energy, Pusan National University) ;
  • Wang, Bin (Department of Bio-Environmental Energy, Pusan National University) ;
  • Jang, Seong-Ho (Department of Bio-Environmental Energy, Pusan National University) ;
  • Park, Jeong-Ho (Department of Environmental Engineering, Gyeongnam National University of Science and Technology) ;
  • Choi, Kum-Chan (Department of Environmental Engineering, Dong-A University)
  • 서정민 (부산대학교 바이오환경에너지학과) ;
  • 왕빈 (부산대학교 바이오환경에너지학과) ;
  • 장성호 (부산대학교 바이오환경에너지학과) ;
  • 박정호 (경남과학기술대학교 환경공학과) ;
  • 최금찬 (동아대학교 환경공학과)
  • Received : 2014.09.15
  • Accepted : 2014.12.16
  • Published : 2014.12.31
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Abstract

Objective: Based on the fact that fine particles are more likely to produce negative influences on the health of occupants as well as the quality of indoor air compared to coarse particles, it is critical to determine concentrations of aerosol particles with different sizes. Thus, this study focused on the size distribution and concentrations of aerosol particles in university buildings. Method: Aerosol particles in indoor air were collected from four areas: corridors in buildings(In-CO), lecture rooms(In-RO), laboratories(In-LR), and a cafeteria(In-RE). Samples were also collected from outside for comparison between the concentrations of indoor and outdoor particles. For the collection of the samples, an eight stage non-viable cascade impactor was used. Result: The average concentration of $PM_{10}$ in the samples collected from indoor areas was $34.65-91.08{\mu}g/m^3$,and the average for $PM_{2.5}$ was $22.65-60.40{\mu}g/m^3$. The concentrations of the aerosol particles in the corridors, lecture rooms, and laboratories were relatively higher than the concentrations collected from other areas. Furthermore, in terms of mass median aerodynamic diameter(MMAD), the corridors and lecture rooms had higher numbers due to their characteristics, showing $2.36{\mu}m$ and $2.11{\mu}m$, respectively. Laboratories running an electrolysis experiment showed $1.58{\mu}m$, and the cafeteria with regular maintenance and ventilation had $1.96{\mu}m$. Conclusion: The results showed that the $PM_{10}$ concentrations of all samples did not exceed indoor air quality standards. However, the $PM_{2.5}$ concentration was over the standard and, in particular, the concentration of fine particles collected from the laboratories was relatively higher, which could be an issue for the occupants. Therefore, it is important to improve the quality of the indoor air in university buildings.

Keywords

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