SOLUBLE AND INSOLUBLE COMPONENTS OF AIR-POLLUTANTS SCAVENGED BY RAIN WATER

In order to study the scavenging mechanism as a find goal, the charact eristics of chemical components in rain water were examined as a funct ion of the amount of rainfall. The rain drops were collected with each 0.1 mm rainfall from the beginning of rain. Rain water was separated into the soluble and insoluble components and the concentrations of 15 elements in both components were determined by the PIXE analysis, The elemental concentrations decreased quickly till. about 0.5 mm of rain fall and then gradually decreased as the rainfall continued. Fe, Ti an d Si in the aerosol particles caught in rain water are in a high insol uble state. On the contrary, almost all S and Cl are dissolved in rain water.