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Related Experiment Videos

Effectiveness of smokeless ashtrays

D A Wampler1, S Miller-Leiden, W W Nazaroff

  • 1University of California, Berkeley, USA.

Journal of the Air & Waste Management Association (1995)
|June 1, 1995
PubMed
Summary

Smokeless ashtrays aim to reduce environmental tobacco smoke (ETS). A prototype using HEPA filters effectively removed over 90% of ETS particles, while another prototype removed 70-95% of gas-phase pollutants.

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Area of Science:

  • Environmental Health
  • Air Quality Engineering
  • Public Health

Background:

  • Environmental tobacco smoke (ETS) poses significant health risks due to particulate and gas-phase contaminants.
  • Smokeless ashtrays are designed to mitigate ETS exposure by filtering smoke.
  • The effectiveness of commercial and prototype smokeless ashtrays requires rigorous experimental evaluation.

Purpose of the Study:

  • To experimentally assess the efficacy of four smokeless ashtrays in reducing ETS.
  • To compare the performance of commercial devices against author-constructed prototypes.
  • To evaluate particle and gas-phase pollutant removal efficiencies.

Main Methods:

  • An experimental protocol involved allowing cigarettes to smolder in a room with and without smokeless ashtrays.

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  • Particulate and gas-phase pollutant concentrations were measured over time.
  • A lung deposition model was used to interpret particle removal effectiveness.

    • Main Results:

    • Commercial ashtrays demonstrated substantial ineffectiveness in removing ETS particles.
    • A prototype ashtray with HEPA filter material achieved over 90% particle removal efficiency.
    • A prototype ashtray with activated carbon and alumina filters showed 70-95% removal efficiency for 18 gas-phase compounds.

    Conclusions:

    • Prototype smokeless ashtrays show significant potential for reducing ETS exposure.
    • HEPA filtration is highly effective for ETS particle removal.
    • Combined activated carbon and alumina filtration can effectively remove ETS gas-phase pollutants.