鹿児島市の大気汚染調査(第27報): 2013年度調査報告

Abstract

Air pollution in Kagoshima City from April 2013 to March 2014 was investigated with particular emphasis on the dust fall (volcanic ash fall) from Mt. Sakurajima. The dust fall was collected monthly with rainwater at eight locations in Kagoshima City. After the sample had been filtered, the residue was dried and weighed, and the filtrate was analyzed for SO4(2-), Cl(-), and water-soluble matter, as well as for pH. The average monthly dust fall at the eight locations in Kagoshima City was 93.0 g・m(exp -2)・month(exp -1), which was 30 % decrease from that observed in the last fiscal year. The concentration of NO2 in the air wasmeasured by use of the “filter-badge method”. The average NO2 concentration at the eight locations was 6.3 ppb, which was somewhat lower than that for the last year.