Deposition rates of fungal spores in indoor environments, factors effecting them and comparison with non-biological aerosols
Kanaani, Hussein, Hargreaves, Megan, Ristovski, Zoran, & Morawska, Lidia (2008) Deposition rates of fungal spores in indoor environments, factors effecting them and comparison with non-biological aerosols. Atmospheric Environment, 42(30), pp. 7141-7154.
Particle deposition indoors is one of the most important factors that determine the effect of particle exposure on human health. While many studies have investigated the particle deposition of non-biological aerosols, few have investigated biological aerosols and even fewer have studied fungal spore deposition indoors. The purpose of this study was, for the first time, to investigate the deposition rates of fungal particles in a chamber of 20.4 m3 simulating indoor environments by: 1) releasing fungal particles into the chamber, in sufficient concentrations so the particle deposition rates can be statistically analysed; 2) comparing the obtained deposition rates with non-bioaerosol particles of similar sizes, investigated under the same conditions; and 3) investigating the effects of ventilation on the particle deposition rates. The study was conducted for a wide size range of particle sizes (0.54 – 6.24 µm), at three different air exchange rates (0.009, 1.75 and 2.5 h-1). An Ultraviolet Aerodynamic Particle Sizer Spectrometer (UVAPS) was used to monitor the particle concentration decay rate. The study showed that the deposition rates of fungal spores (Aspergillus niger and Penicillium species) and the other aerosols (canola oil and talcum powder) were similar, especially at very low air exchange rates (in the order of 0.009). Both the aerosol and the bioaerosol deposition rates were found to be a function of particle size. The results also showed increasing deposition rates with increasing ventilation rates, for all particles under investigation. These conclusions are important in understanding the dynamics of fungal spores in the air.
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|Item Type:||Journal Article|
|Keywords:||deposition rate, air exchange rates (AER), fungal particles, fluorescent percentage, ventilation rate|
|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
Current > Institutes > Institute of Health and Biomedical Innovation
|Copyright Owner:||Copyright 2008 Elsevier|
|Copyright Statement:||Reproduced in accordance with the copyright policy of the publisher.|
|Deposited On:||31 Oct 2008|
|Last Modified:||29 Feb 2012 13:50|
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