鹿児島市の大気汚染調査（第23報） : 平成21年度調査報告

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概要

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• Air pollution in Kagoshima City from April 2009 to March 2010 was investigated with particular emphasis on the falling dust (volcanic ash fall) from Mt. Sakurajima. The falling dust was collected monthly with rainwater at eight locations in Kagoshima City. After the sample had been filtered, theresidue was dried and weighed, and the filtrate was analyzed for SO_4＾< 2->, Cl＾-, and water-soluble matter, as well as for pH. The average monthly falling dust at the eight locations in Kagoshima City was 40.4 g·m＾<-2>·month＾<-1>, which was about 3.5 times higher than that observed in the last fiscal year. Although the tendency of low falling dust has continued since 2001, recently the falling dust rapidly increased year by year. The concentration of NO_2 in the air was measured by use of the "filter-badge method". The average NO_2 concentration at the eight locations was 7.6 ppb, which was somewhat higher than that for the last year.

• 2010-10-29

著者

• 上山 由貴

  鹿児島大

• 河井 晴恵

  鹿児島大

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