Suspended Particulates in Osaka city
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概要
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Suspended particulates were collected by high volume air sampler at 5 to 7 sites in Osaka City during 1966 to 1973. The concentrations of suspended particulates, sulfates, nitrates, metals and benzo (a) pyrene were measured. Size distribution of particulates collected by Andersen high volume sampler was also determined. Concentrations have been reduced after the year 1969, when they were maximum.<BR>Pollution level has become similar in every area of Osaka except western seaside industrial area. As it can be seen in the result of statistical analysis, this variation was considered to be produced by the cause that high concentration and regional pollution was decreased by emission source control for large factories and, on the contrary, pollution sources were scattered from city-center to outskirts by mobile traffic.<BR>Epidemiological analysis made it clear that the level of compound pollution by sulfates and suspended particulates indicated a certain effect on human health throughout Osaka City.<BR>Factor analysis method was applied to air pollution mainly due to suspened particulates in Osaka. As a result, three common factors were obtained from 18 to 20 variable data. They were as follows; the first was the factory, the second was automobile and the third was the component of pollutants. Further, factor scores were obtained at each sampling site. Consequently, hypothesis of these factors was found to be well agreed with actual pollution in sampling areas.<BR>In addition to the indices that have already known, following things can be presented as parameters that could be obtained from factor analysis of this time; the amounts of pollutants emitted from small and median factories, and exhausted by automobiles as that of emission source, sulfates and vanasium in suspended particles as that of the concentration of environmental quality and absent rate of school children from respiratory diseases as that of effect on human body.
- 社団法人 大気環境学会の論文
社団法人 大気環境学会 | 論文
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