Effect of Acid Deposition on Urban Dew Chemistry in Yokohama, Japan

Hiroshi Okochi, Takuya Kajimoto, Yukiko Arai, Manabu Igawa

研究成果: Article

40 引用 (Scopus)

抄録

Dews or frosts formed on artificial collectors were collected during the early morning in Yokohama in 1993 and 1994 and analyzed for weak acids as well as major inorganic ions. In 1993 (n=21) the dew pH ranged from 3.23 to 7.12 and averaged 4.60; in 1994 (n=56) it ranged from 4.11 to 7.74 and averaged 5.41. Based on the average, NH4+ and Ca2+ were major cations (423 and 178 μequiv L-1 for NH4+ and Ca2+ in 1993, respectively, and 454 and 274 μeuivq L-1 in 1994, respectively) and SO42- was the dominant anion (344 μeuivq L-1 in 1993 and 271 μeuivq L-1 in 1994) in dew water. The dew chemistry was characterized by relatively high concentrations of weak acid anions, particularly hydrogensulfite ion (HSO3-). Dew water sometimes had very high acidity (the minimum pH was 3.23 during the period of this research), which might have been due to the aqueous oxidation of S(IV). From a resistance model calculation, the S(IV) concentration in dew water was suggested to be influenced by the dissolution of HCHO from the atmosphere and the subsequent formation of HMSA.

元の言語English
ページ(範囲)3355-3365
ページ数11
ジャーナルBulletin of the Chemical Society of Japan
69
発行部数11
出版物ステータスPublished - 1996 11
外部発表Yes

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Acids
Anions
Water
Inorganic acids
Ions
Acidity
Cations
Dissolution
Oxidation

ASJC Scopus subject areas

  • Chemistry(all)

これを引用

Effect of Acid Deposition on Urban Dew Chemistry in Yokohama, Japan. / Okochi, Hiroshi; Kajimoto, Takuya; Arai, Yukiko; Igawa, Manabu.

:: Bulletin of the Chemical Society of Japan, 巻 69, 番号 11, 11.1996, p. 3355-3365.

研究成果: Article

Okochi, H, Kajimoto, T, Arai, Y & Igawa, M 1996, 'Effect of Acid Deposition on Urban Dew Chemistry in Yokohama, Japan', Bulletin of the Chemical Society of Japan, 巻. 69, 番号 11, pp. 3355-3365.
Okochi, Hiroshi ; Kajimoto, Takuya ; Arai, Yukiko ; Igawa, Manabu. / Effect of Acid Deposition on Urban Dew Chemistry in Yokohama, Japan. :: Bulletin of the Chemical Society of Japan. 1996 ; 巻 69, 番号 11. pp. 3355-3365.
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