<報文>p-ジクロベンゼンの大気中動態

概要

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Based on 2,500 air samples, P-dichlorbenzene was measured by using the automatic analyzing system. As a result of this research, its movement in the atmosphere was considered. It was found that p-dichlorobenzene as insecticide sublimed to form the atmospheric pollution in urban area and its average concentration was estimated to be the order of ppb in usual use. The concentration lebel of p-dichlorobenzene was dependent bn the temperature, that is, its rise to 10℃ resulted　in about 1.5times rise of the concentration. According to the photochemical experiment, p-dichlorobenzene showed the lowest reactivity among the other pollutants tested. This property accounted well the fact that its background value was higher than in the case of the other pollutants. The accumulation of p-dichlorobenzene was observed widely in the environment. Therefore, its marketing as a daily commodity must be controlled immediately.