Microorganism-ionizing respirator with reduced breathing resistance suitable for removing airborne bacteria

Miri Park, Ahjeong Son, Beelee Chua

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


In this paper, we have demonstrated the feasibility of using microorganism-ionizing respirators with reduced breathing resistance to remove airborne bacteria. Using a miniaturized corona ionizer and two pairs of separator electrodes, airborne bacteria were ionized and removed from the airflow. Two microorganism-ionizing respirator designs were experimentally evaluated with flow rates ranging from ∼10 to 20 L/min and yielded airborne bacterial removal efficiencies of ∼75%–100%. Further, they were in close agreement with the analytical airborne particle removal efficiencies, at a similar range of flow rates. These flow rates also correspond to the breathing rates of standing and walking adults. More importantly, the breathing resistance could be reduced by more than 50% for flow rates of ∼200 L/min. Using manganese (IV) oxide coated mesh, the ozone concentration in the air outflow was reduced to less than 0.1 ppm, at a flow rate of ∼20 L/min, thus enabling safe use. The power consumption was less than 1 W.

Original languageEnglish
Pages (from-to)437-446
Number of pages10
JournalSensors and Actuators, B: Chemical
StatePublished - 10 Dec 2018

Bibliographical note

Publisher Copyright:
© 2018 Elsevier B.V.


  • Airborne microorganisms
  • Bacteria
  • Breathing resistance
  • Corona ionizer
  • Ionizer
  • Respirator


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