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An efficient virus aerosol sampler enabled by adiabatic expansion.

Haoran Yu1,2, Nima Afshar-Mohajer1,3, Alexandros D Theodore4

  • 1Department of Environmental Engineering Sciences, Engineering School of Sustainable Infrastructure and Environment, University of Florida, Gainesville, FL, USA.

Journal of Aerosol Science
|April 1, 2020
PubMed
Summary

A new Batch Adiabatic-expansion for Size Intensification by Condensation (BASIC) method efficiently samples airborne viruses. This technique amplifies virus particle size, improving collection of viable airborne viruses for public health protection.

Keywords:
CondensationMS2SamplingSize amplificationSupersaturation

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Area of Science:

  • Environmental Science
  • Microbiology
  • Aerosol Science

Background:

  • Effective airborne virus sampling is crucial for public health.
  • Conventional samplers struggle with ultrafine virus aerosols (<100 nm).

Purpose of the Study:

  • Develop an efficient method for sampling viable airborne viruses.
  • Improve sampling efficiency for ultrafine virus aerosols.

Main Methods:

  • Introduced the Batch Adiabatic-expansion for Size Intensification by Condensation (BASIC) approach.
  • Utilized adiabatic expansion and condensation to enlarge virus aerosol particles.
  • Optimized BASIC using MS2 bacteriophage for size amplification and viability.

Main Results:

  • One compression/expansion cycle increased particle diameter from <100 nm to >1 µm.
  • Increased compression pressure enhanced size amplification and viable MS2 collection.
  • Optimal conditions for size amplification and viability were 103.5 kPa and 40°C water temperature.

Conclusions:

  • BASIC is a simple, rapid, and inexpensive tool for sampling viable airborne viruses.
  • The method effectively overcomes limitations of conventional bioaerosol samplers.
  • BASIC enhances public health protection by improving airborne virus detection.