Abstract
Adsorption by dust samples from homes was studied to evaluate the extent to which household dust particles could act as carriers of vapors into the lower respiratory tract. The dust samples were examined for volatilizable and combustible materials via thermogravimetric analysis as well as for specific surface area and surface characteristics by nitrogen and formaldehyde adsorption and desorption isotherms. Particle morphology and size were examined by scanning electron microscopy (SEM) and elemental composition by energy dispersive x-ray analysis (EDXA). Thermogravimetric analysis (TGA) demonstrated marked differences between samples from different homes. The volatilizable material removed by heating dust samples in argon to 500°C ranged from 32% to 69%. The residue not combustible in oxygen at 700°C, presumably minerals, ranged from 11% to 58%. In most cases, differences between samples from the same borne were small. SEM of the samples demonstrated the presence of many fibers and of irregularly shaped p...
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