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Scavenging of Submicron Aerosol Particles by Cloud of Charged Droplets Generated from Electro-Hydrodynamic Atomizer (EHDA)

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Abstract

High aerosol concentration is a cause of concern for human health and environment. Hence, developing novel methods and techniques for mitigating aerosols is the need of hour. Scavenging of aerosol particles using charged droplets generated using electro-hydrodynamic atomizer (EHDA) is an upcoming technology for aerosol mitigation. An experimental system, containing a single capillary EHDA mounted on a horizontal cylindrical-shaped aerosol charging chamber, is designed and fabricated to investigate aerosol scavenging characteristics. For evaluation of size-dependent aerosol scavenging characteristics, three types of test aerosols, namely smoke, nebulized NaCl and hot wire-generated metallic aerosols, are used. These aerosols are well characterised with respect to their size and charge distribution. For smoke aerosols, removal efficiency varied from 15 to 90% for particles in the range of 30 to 200 nm diameter. For NaCl aerosols, removal efficiency varied from 70 to 90% and is fairly independent of the particle size. Hot wire-generated metallic aerosols showed significant removal for aerosols size more than 30 nm. However, for particles size less than 20 nm, it is observed that aerosol concentration increases, when charge droplets are injected in neutralization chamber of EHDA. It is expected that these results will further provide efficacy and robustness to the EHDA-based eco-friendly air cleaning technology.

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Authors and Affiliations

  1. Health Safety and Environmental Group, Bhabha Atomic Research Centre, Mumbai, 85, India

    Sanjay Singh, Arshad Khan, Amruta Nakhwa & B. K. Sapra

  2. Indian Institute of Technology Bombay, Mumbai, 76, India

    Y. S. Mayya

  3. Homi Bhabha National Institute, Mumbai, 94, India

    B. K. Sapra

Authors
  1. Sanjay Singh
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  2. Arshad Khan
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  3. Amruta Nakhwa
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  4. B. K. Sapra
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  5. Y. S. Mayya
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Correspondence to Arshad Khan.

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Singh, S., Khan, A., Nakhwa, A. et al. Scavenging of Submicron Aerosol Particles by Cloud of Charged Droplets Generated from Electro-Hydrodynamic Atomizer (EHDA). Aerosol Sci Eng 5, 223–232 (2021). https://doi.org/10.1007/s41810-021-00096-4

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  • DOI: https://doi.org/10.1007/s41810-021-00096-4

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