文章基本信息

标题：北九州市における浮遊粉じんの推移と現状 : 長期間の観測データ(1970-1994)から
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作者：今泉五和男 ; 大和康博 ; 花田喜文等
期刊名称：Journal of Health Science
印刷版ISSN：1344-9702
电子版ISSN：1347-5207
出版年度：1996
卷号：42
期号：2
页码：182-188
DOI：10.1248/jhs1956.42.182
出版社：The Pharmaceutical Society of Japan
摘要：A long-term (1970-1994) study of atmospheric aerosol has been conducted in Kitakyushu City. The annual mean concentrations of aerosol had gradually decreased until 1983 and they have been stable since then. To investigate the change of the aerosol quality, the total mass and constituents of aerosols collected for 1972-1974 (period I : heavily polluted period) and 1984-1988 (period II : improved period) were compared. The decrease rate (%) of all constituents (inorganic ions : SO₄^2-, NO₃^-, F^-, Cl^-, Ca²⁺ and Mg²⁺ ; metals : Fe, Mn, Zn, V and Pb) except SO₄^2- was much larger than that of the aerosol amount. The concentration of NO₃^- in the aerosol in period II was 54% of that in period I. It was considered that this result was based on the decrease (period II/period I : 45%) of atmospheric NO_x, which was supposed to be a precursor. In contrast, there was a nonproportional relationship between the decrease (88%) of SO₄^2- in the aerosol and the decrease (20%) of atmospheric SO₂. These results show the characteristic of the change of aerozol in Kitakyushu City for 24 years (1970-1994).
关键词：urban air pollution;particulate matter;trend;chemical composition