<報文>震生湖における有機汚染質の起源

概要

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In order to trace the origin of organic pollutants in the water, the influence of air pollution, which was considered one of the cause, was investigated. Shinsei-ko is located in the City of Hatano north-western in Kanagawa Prefecture and is isolated from other water systems. This lake was, therefore, suitable to make clear the relation between water pollution and air pollution. In the experiment several organic compounds in the lake water, in the air and in the rainfall were measured. It was found that every organic pollutants, such as acetone, carbone tetrachloride, methylethylketone, benzene, trichloroethylene, chloroform, tetrachloroethylene and toluene in the lake, existed in the air or in the rainfall and still more the ratios of these amounts were the same as expected from the concentration in the air and each solubility for water. Then, it was concluded that the volatile organic pollutants generally found in the water over the land were introduced from the air, excepting for a portion from the sewage or the industrial draining. Besides, as compared with the river water of the Kanto District and Hokkaido, the concentrations of organics in the water were seemed to be affected by polluted state of atmosphere.