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Soluble and insoluble components of air pollutants scavenged by rain water

1996; Elsevier BV; Volume: 118; Issue: 1-4 Linguagem: Inglês

10.1016/0168-583x(95)01087-4

1872-9584

Mikio Kasahara, Hideaki Ogiwara, Kouhei Yamamoto,

Smart Materials for Construction

In order to study the scavenging mechanism as a final goal, the characteristics of chemical components in rain water were examined as a function 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 rainfall and then gradually decreased as the rainfall continued. Fe, Ti and Si in the aerosol particles caught in rain water are in a high insoluble state. On the contrary, almost all S and Cl are dissolved in rain water.