<報文>本邦湖沼中のハロカーボン類の動態に関する調査研究

概要

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Halogenated organics belong to the most important materials of the global pollution. As a subject of this problem, the volatile halocarbons in lake water of Japan were dealt with in this paper. It was considered that the lake water was isolated from the other hydrosphere and, therefore, it was influenced by air diffusion of the halocarbons. Seventy four lakes located in 5 regions in Japan were surveyed, and the harocarbons such as CCl4, CH3, CC18, CHClCC12, CCl2CC12, CHCl3 and CHCl2Br were analyzed by GC-ECD. The results of determination of above components were illustrated graphically to compare the ratio of them and by this the features of diffusing harocarbons to environment were as follows : Most lakes were polluted by halocarbons, except a few lakes located at the remote place as the Mt.Kirislma or the southern extremity in Kagosima Prefecture. The high level was 0.1 to 1 ppb, the average level was 0.01 to 0.1ppb and the low level was below 0.01ppb. Most volatile harocarbons were seemed to be carried by the air or the rain and to be related with the air pollution. But in the case of high triharomethane, such as chloroform, inflows of city water were suggested as the cause. The samples in Chiba and Kagawa Prefectures were similar in the ratio, which were assumed to be one of the typical types in the countries.
横浜国立大学の論文