抄録
Suspended particles released from various small facilities, such as metal melting furnaces, heat treatment furnaces for metal oxides and pulverizers, were subjected to multielement analyses by means of instrumental neutron activation method and energy dispersive X-ray fluorescence spectrometry. Elemental concentrations in suspended particles were naturally quite varied depending on the kind of facility. In order to make it easy to grasp the contribution of suspended particles from a facility in question to the nearby atmospheric environment, the elemental concentration ratio, CR, of the suspended particles to the typical atmospheric aerosol particles, was calculated and used as a measure of pollution contribution. The geometric means of elemental concentrations, which were obtained on the basis of the results of multielement analyses of airborne particulate samples collected in 110 residential areas distributed all over Japan, were adopted as the elemental concentrations of the typical atmospheric aerosol particles. It is quite natural that the values of CR are high for the elements which are enriched in the materials handled in the facility in question. It is noteworthy that considerably high values of CR were found for some elements which were not the main constituent elements of the materials handled.
