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Concept
Occupational dust exposure
Résumé
Occupational dust exposure can occur in various settings, including agriculture, construction, forestry, and mining. Dust hazards include those that arise from handling grain and cotton, as well as from mining coal. Wood dust, commonly referred to as "sawdust", is another occupational dust hazard that can pose a risk to workers' health.
Without proper safety precautions, dust exposure can lead to occupational lung diseases.
Dust particles are generated by the disturbance/agitation of rock/mineral, dry grain, timber, or fiber material. The particles generated can range in size from 1μm to 100μm, and can "become airborne depending on their origin, physical characteristics and ambient conditions."
Types of dust present in the occupational setting include:
Rock/mineral dusts
Metallic dusts
Chemical dusts
Grain and produce dusts
Molds and spores
During various mining processes in which rock/minerals are broken up and collected for processing, mineral dusts are created and become airborne. Inhalation of these dusts can lead to various respiratory illnesses, depending on the dust type (e.g. coal, silica, etc.), size of the dust particulates, and exposure duration.
During the stages of wood processing, wood dust is generated. 'Wood dust' is "any wood particle arising from the processing or handling of woods." Sawing, routing, sanding, among other activities, form wood dust, which can then become airborne during the process of dust removal from furniture, maintenance, or equipment cleanup.
Dust generated from milling, handling and storage of grains or fibers can pose a threat to workers' health. During the milling process, solid agricultural grains (corn, barley, wheat, cotton etc.) may undergo crushing, grinding, or granulation. This process generates agricultural dust. Improperly handling grains can also expose workers to grain dusts. Grain storage can also present hazards to workers. Storage structures can create dangerous conditions due to gases emitted from spoiled grains and chemical fumes.
Source officielle
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