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Wind Erosion:
An International Symposium/Workshop

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Participant Information
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Fugitive Dust Generation in the Laboratory

Thomas E. Gill, Ted M. Zobeck, John E. Stout, and James M. Gregory


Production and collection of fugitive dust in the laboratory, as opposed to the field, facilitates improved control and measurement of the physical processes associated with aerosol generation. We developed a system to investigate the generation, particle size, and PM10 content of airborne dust. An aerosol generation chamber produces dust by controlled application of kinetic energy to a source sample. Instruments in the dust-transport and settling regions of the system measure aerosol size spectra and the amount of PM10 evolved by a sample. We used this system to investigate the ability of different soils and road surfaces to produce dust, and to show how dust generation and production properties of a material change as a dust event progresses and soil aggregates break down. For soils near Lubbock, Texas, sandy loams produced more PM10 than did clay soils or sand under the same experimental conditions, although PM10 as a fraction of all dust produced was highest for the sand. An unpaved road surface was more "dusty" than any of the soil types tested. Two fine sandy loam soils of different series produced different amounts of dust with different particle size characteristics, perhaps due to variations in aggregate stability and parent materials.