What is the reason asbestos fibers remain airborne for extended periods?

Asbestos fibers remain airborne for extended periods primarily because of their small size. This small diameter allows them to remain suspended in the air for longer durations as they do not easily settle out of the atmosphere like larger particles. The small size facilitates their ability to be carried over distances by air currents, increasing the likelihood of inhalation and subsequent health risks.

Moreover, the characteristics of asbestos fibers contribute to their persistence in the air. Their length-to-diameter ratio is significant, which allows them to remain airborne even in relatively low air pressure conditions. However, options that suggest adhesive properties or high air pressure do not fundamentally contribute to the airborne behavior of asbestos fibers; instead, it is the small size that plays a crucial role in their mobility and longevity in the air. This understanding is critical, especially in occupational hygiene, as it emphasizes the need for effective monitoring and control measures in environments where asbestos may be present.