Removal of submicron aerosol particles and bioaerosols using carbon fiber ionizer assisted fibrous medium filter media

Jae Hong Park, Ki Young Yoon, Yang Seon Kim, Jeong Hoon Byeon, Jungho Hwang

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

This paper reports the installation of a carbon fiber ionizer in front of a fibrous medium filter to enhance the removal of submicron aerosol particles and bioaerosols. Test particles (KCl) were classified with a size range of 50-600 nm using a differential mobility analyzer (DMA). The number concentration of the test particles was measured using a condensation particle counter (CPC). The average charge per particle was estimated by current measurements using an aerosol electrometer. At the face velocity of 0.5 m/s, the particle removal efficiency was 31.4% (for dp=100 nm) when the ionizers were not operating but increased to 35.7% and 46.9% at 1.6×1011ions/s and 6.4×1012ions/s with the ionizers, respectively. For the antibacterial tests, the test bioaerosols (E. coli) were aerosolized using a nebulizer and were deposited on the filter media for 5 minutes. After the deposited bioaerosols were exposed to unipolar air ions, they were incubated for 12 hours. The survival efficiency of E. coli was measured using a colony counting method. The survival fractions of E. coli exposed to positive air ions for 1, 5 and 10 minutes were 61.7%, 45.4% and 25.2%, respectively.

Original languageEnglish
Pages (from-to)1846-1851
Number of pages6
JournalJournal of Mechanical Science and Technology
Volume23
Issue number7
DOIs
Publication statusPublished - 2009

Bibliographical note

Funding Information:
The authors acknowledge the financial support from the Seoul R&BD (research and business design) program (Grant no. 10593).

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering

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