Re: Respirable Particles - Pu and Cassini

[mcnaught@lanl.gov (Mike McNaughton)]

>Particles that are too small act much as
>gasses and are exhaled with the next breath (less than 10% of
>spherical particles of unit density smaller than .01 microns will be
>deposited in the lungs, with this fraction dropping to 0 at about
>0.005 microns

This is interesting. Is this published and/or documented?

The standard textbook graphs of HEPA filter efficiency do not extend to
particles this small. It would seem to follow, logically, that if it does
not stick on the lung surfaces, presumably it does not stick on a filter
either. How efficient are HEPA filters for nanometer sized particles?

"Shlala gashle" (Zulu greeting, meaning "Stay safe")
mike (mcnaught@LANL.GOV)