Air pollution Kagoshima city and Sakurajima caused by volcanic ashes from Mt. Sakurajima : Part VI : investigation from April 1, 1983 through March 31, 1984

TAKESHITA, Toshio, MAEDA, Shigeru, IMAYOSHI, Morio, NISHI, Hisato

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鹿児島市および桜島の大気汚染(降灰)調査 (第6報) : 昭和58年度調査報告
鹿児島市および桜島の大気汚染(降灰)調査-6-昭和58年度調査報告
カゴシマシオヨビサクラジマノタイキオセンコウカイチョウサ 6 シ

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Samples of volcanic ashes from Mt. Sakurajima were collected monthly at l4 locations in Kagoshima City and at 7 locations in Sakurajima from April 1, 1983 through March31, 1984. The samples collected were filtered, the residues were dried and weighed, and the filtrates were analyzed for pH, SO_4^{2-}, Cl^-, and water-soluble matter. The amounts of sulfur oxides absorbed by PbO_2-candles which had been placed at 19 of the above mentioned locations were also determined monthly. The highest amount of volcanic ashes in this fiscal year was 19,393ton/km^2/month, which was recorded at Kurokami Middle School in October. This is also the highest value recorded during the last 6 years. The highest amount of sulfur oxides absorbed by the PbO_2-candles in this fiscal year was 2.26mg/100cm^2/day, which was observed at Sakurajima-so in December. Acidification of rain was observed at all locations, and the strongest acidity of the rain collected was pH2.8 which was recorded at Sakurajima Middle School in November.

Journal

The research reports of the Faculty of Engineering, Kagoshima University

The research reports of the Faculty of Engineering, Kagoshima University 26 67-85, 1984-11

鹿児島大学

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