Tashfeen Muhammad Hammad Ud Din This email address is being protected from spambots. You need JavaScript enabled to view it., James A. McGrath, Miriam A. Byrne

School of Physics, Ryan Institute’s Centre for Climate & Air Pollution Studies, National University of Ireland Galway, University Road, Galway, H91 CF50, Ireland 


 

Received: March 6, 2020
Revised: July 31, 2020
Accepted: August 4, 2020

 Copyright The Author's institutions. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited. 


Download Citation: ||https://doi.org/10.4209/aaqr.2020.03.0094  

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Cite this article:

Hammad Ud Din, T.M, McGrath, J.A. and Byrne, M.A. (2020). A Test Chamber Investigation of the Effect of Charge on Aerosol Deposition on Indoor Surfaces. Aerosol Air Qual. Res. https://doi.org/10.4209/aaqr.2020.03.0094


HIGHLIGHTS

  • Charged aerosols enhanced deposition investigation in test chamber.
  • Enhanced deposition of charged aerosols as compare to uncharged aerosols.
  • Comparison of surfaces polyethylene increased the deposition considerably.
 

ABSTRACT


Exposure to radioactive aerosols of accidental origin is harmful to human health. Radioactive aerosols have an ability to self-charge due to ionization, and this influences their deposition behavior, but this effect has been rarely studied. In a test chamber study, the effect is investigated by using a corona unit to apply charges that are representative of the levels found on radioactive particles to three aerosol size distributions of 0.5 μm, 1.0 μm and 2.0 μm. Aerosol deposition velocities were calculated for each particle size, two chamber airflow values, three aerosol charge regimes (high positive, high negative, and no corona charging), and three interior wall surfaces (aluminum, wallpaper, polyethylene). The results show no significant difference between deposition velocities of charged aerosols of opposite polarities, but a difference of up to 72% between deposition velocities of corona-charged and uncharged aerosols. For all aerosol sizes and charge regimes, aerosol deposition was found to be enhanced to the greatest degree when the chamber walls were lined with polyethylene, with values found to be up to 4–8 times higher than those calculated in aluminum-walled chamber cases.

 


Keywords: Aerosol charge; Radioactive aerosols; Fine aerosols; Surface charge; Enhanced deposition.



Aerosol Air Qual. Res. 20 :-. https://doi.org/10.4209/aaqr.2020.03.0094  


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