Size Distribution of Inorganic Species and Their Inhaled Dose in a Detergent Industrial Workplace

摘要

Aerosol particles in the workplace of a detergent industry were sampled during July 2005 by a Berner low-pressure impactor.The samples were analyzed by atomic absorption spectrometry and ion chromatography in order to determine the size distribution of metallic elements and water-soluble inorganic ions.The size distributions of some characteristic metallic elements(Cu,Fe,Al)were unim-odal with their maximum found in coarse particles.Among the water-soluble aerosol components SO_4~=NO_3~-,Cl~-,NH_4~+and Ca~(++)were the major contributors to total particle mass.The lung deposition resulting from the partially hygroscopic aerosol is estimated.The calculated lung deposition reveals the impact of separate chemical aerosol compounds on the levels of the inhaled dose.The differences observed between the total and regional deposition of the different compounds appear mainly due to their different size distributions.