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Collection of Airborne Microorganisms into Liquid by Bubbling through Porous Medium

Agranovski, Igor E., Agranovski, Victoria, Grinshpun, Sergey A., Reponen, Tiina, & Willeke, Klaus (2002) Collection of Airborne Microorganisms into Liquid by Bubbling through Porous Medium. Aerosol Science and Technology, 36(4), pp. 502-509.

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Abstract

A new method for the removal of airborne particles by air bubbling through fibrous filters immersed into a liquid has recently been developed (Agranovski et al. 1999) and shown to be very efficient for cleaning air environments with ultra-fine aerosol particles. The principal objective of the present study was to evaluate the new bubbling technique for the collection of airborne bacteria into a liquid for subsequent physical and microbiological analysis. It was found that the technique is capable of achieving a physical collection efficiency of 98.5% or higher for particles larger than 0.3 wm in aerodynamic diameter. The physical collection efficiency of the prototype bubbler remained at that high level for 8 h of continuous operation with negligible variation of the pressure drop across the device. Evaporation of the collection fluid did not exceed 20% during 8 h, and the reaerosolization effect on the physical collection efficiency of the bubbler prototype was <8%. The recovery rate of gram-negative Pseudomonas fluorescens bacteria collected for 20 min was shown to be as high as 74% - 10%. Its decrease with time was not statistically significant: the recovery rate reached 63% - 15% and 58% - 16% after 4 and 8 h of continuous operation, respectively. Thus the bubbling technique was demonstrated to be suitable for collecting viable airborne bacteria even if they are sensitive to the stress.

Impact and interest:

23 citations in Scopus
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20 citations in Web of Science®

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ID Code: 5800
Item Type: Journal Article
Additional Information: For more information, please refer to the journal’s website (see link) or contact the author. Author contact details: v.agranovski@qut.edu.au
DOI: 10.1080/027868202753571322
ISSN: 1521-7388
Subjects: Australian and New Zealand Standard Research Classification > EARTH SCIENCES (040000) > ATMOSPHERIC SCIENCES (040100) > Atmospheric Sciences not elsewhere classified (040199)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2002 Taylor & Francis
Copyright Statement: First published in Aerosol Science and Technology 36(4):pp. 502-509.
Deposited On: 12 Dec 2006
Last Modified: 10 Aug 2011 22:58

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