A STUDY ON URBAN PARTICULATE AIR POLLUTANTS BY THIN METAL FILM METHOD

Abstract

Particulate pollutants in urban air were collected on collodion membrane and thin metal film, and observed electronmicroscopically. Particles which took a jellied or greasy appearance and evaporated after exposure to electron beam on collodion mem-brane were noticed. On metal film, these jellied particles showed various appearances different from those on collodion membrane in consequence of an interaction between some components of particles and metal.
Strong corrosiveness of jellied particles seen in summer may have some relation to the irritability of air pollutants to mucous membrane by air pollution.