Assessment of indoor bioaerosols using a lab-made virtual impactor

Ali Mohamadi Nasrabadi, Ji Woon Park, Hyung Sun Kim, Jang Seop Han, Junho Hyun, DongEun Yong, Jungho Hwang

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

To assess indoor bioaerosols, a virtual impactor having 1 µm cutoff diameter was designed, fabricated, and evaluated with computational fluid dynamics simulation and also with laboratory test using polystyrene latex particles. Two other cutoff diameters of 635 nm and 1.5 µm were obtained by changing the inlet flow rate and the ratio of minor channel-to-inlet flow rates. In field test, the virtual impactor was operated with varying cutoff diameter and field-emission scanning electron microscope (FE-SEM) analysis was performed for each cutoff diameter to observe morphologies of indoor aerosol particles sampled at the major and minor outlet channels. Particles were sampled at both outlet channels using the SKC Button Aerosol sampler and subsequently cultured. By colony counting, it was found that 56% of cultured fungal particles and 63% of cultured bacterial particles had aerodynamic sizes smaller than 1 µm. MALDI-TOF analysis and visual inspection of culture samples were used to identify indoor bacterial and fungal species, respectively. Nearly same species of bacteria and fungi were detected both in the major and minor flow channels.

Original languageEnglish
Pages (from-to)159-167
Number of pages9
JournalAerosol Science and Technology
Volume51
Issue number2
DOIs
Publication statusPublished - 2017 Feb 1

Fingerprint

Inlet flow
Aerosols
Particles (particulate matter)
Flow rate
Channel flow
Fungi
Latexes
Field emission
Polystyrenes
Bacteria
Aerodynamics
Computational fluid dynamics
Electron microscopes
Inspection
aerosol
Scanning
Computer simulation
channel flow
computational fluid dynamics
sampler

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Materials Science(all)
  • Pollution

Cite this

Mohamadi Nasrabadi, Ali ; Park, Ji Woon ; Kim, Hyung Sun ; Han, Jang Seop ; Hyun, Junho ; Yong, DongEun ; Hwang, Jungho. / Assessment of indoor bioaerosols using a lab-made virtual impactor. In: Aerosol Science and Technology. 2017 ; Vol. 51, No. 2. pp. 159-167.
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Assessment of indoor bioaerosols using a lab-made virtual impactor. / Mohamadi Nasrabadi, Ali; Park, Ji Woon; Kim, Hyung Sun; Han, Jang Seop; Hyun, Junho; Yong, DongEun; Hwang, Jungho.

In: Aerosol Science and Technology, Vol. 51, No. 2, 01.02.2017, p. 159-167.

Research output: Contribution to journalArticle

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