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Related Experiment Videos

Dust emissions in cattle feedlots.

J B Sweeten1, C B Parnell, R S Etheredge

  • 1Texas A&M University, College Station.

The Veterinary Clinics of North America. Food Animal Practice
|November 1, 1988
PubMed
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Texas cattle feedlots emitted significant dust, with concentrations of total suspended particulate matter (TSP) and PM-10 often exceeding EPA standards. Dust levels varied by time of day and were lower than previous California studies.

Area of Science:

  • Environmental Science
  • Agricultural Engineering
  • Atmospheric Science

Background:

  • Cattle feedlots are significant sources of airborne particulate matter.
  • Understanding dust emissions is crucial for environmental regulation and public health.
  • Previous research on feedlot dust provided a baseline for comparison.

Purpose of the Study:

  • To measure dust emissions, including total suspended particulate matter (TSP) and PM-10, at Texas cattle feedlots.
  • To compare current dust concentrations with historical data and regulatory standards.
  • To investigate factors influencing dust concentrations, such as time of day and moisture.

Main Methods:

  • Conducted 15 measurement occasions at three Texas cattle feedlots in 1987.
  • Utilized Wedding and Andersen-321A PM-10 samplers to measure particulate matter.

Related Experiment Videos

  • Analyzed concentrations of TSP and PM-10, particle size distribution, and correlation with moisture and time of day.

    • Main Results:

    • Net feedlot dust concentrations averaged 412.4 µg/m³, 37% lower than previous California studies.
    • PM-10 concentrations were 19-40% of TSP concentrations, with good correlation between the two.
    • Dust levels were highest in the early evening and lowest in the early morning.
    • Feedlots frequently exceeded state and federal TSP and PM-10 standards (Andersen-321A sampler).

    Conclusions:

    • Texas cattle feedlots can exceed air quality standards for particulate matter.
    • PM-10 measurements varied depending on the sampler used.
    • Dust concentrations are influenced by time of day and, to a lesser extent, moisture.