Asbestos fibers aerodynamic diameter

Both of these approximations differ from Eq. 5.15 in the value of the coefficient and in the value of the exponent of the aspect ratio (Ve versus Vi). Spurny et al. (1978) reported experimental measurements of asbestos fiber aerodynamic diameters which indicate a range of exponential values of 0.116 to 0.171 with a coefficient of about 1.34. However, even if the details are still not clear, it is clear that for fibers the... 

Example 5.10 Estimate the aerodynamic diameter of the asbestos fiber in Example 5.9, using Eq. 5.21. 

Example 6.5 An asbestos fiber is reported to have an aerodynamic diameter of... 

Asbestos fibers are nonvolatile and insoluble, so their natural tendency is to settle out of air and water, and deposit in soil or sediment (EPA 1977, 1979c). However, some fibers are sufficiently small that they can remain in suspension in both air and water and be transported long distances. For example, fibers with aerodynamic diameters of 0.1-1 pm can be carried thousands of kilometers in air (Jaenicke 1980), and transport of fibers over 75 miles has been reported in the water of Lake Superior (EPA 1979c). Adsorptive interactions between the fibers and natural organic contaminants may favor coagulation and precipitation of the fibers (EPA 1979c). 

Stober, W., Flaschsbart, H., and Hochrainer, D. (1970). The aerodynamic diameter of latex aggregates and asbestos fibers. Staub-Reinhalt Li 30 1-12. 

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