Abstract
The deposition of hygroscopic aerosol particles in the human respiratory tract is calculated for NaCl particles. The calculation uses an estimate of the relative humidity in the upper airways, a theory of particle growth in humid air, and a model for the deposition of aerosol particles in the human respiratory tract. The results show that considerable differences in deposition may occur from that expected for a non growing aerosol particle with the same initial size and density. This is particularly true for deposition in the bronchial region of particles with an initial size of about 3 μm.
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