Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 3355-3365 |
| Number of pages | 11 |
| Journal | Bulletin of the Chemical Society of Japan |
| Volume | 69 |
| Issue number | 11 |
| Publication status | Published - 1996 Nov |
| Externally published | Yes |
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Cite this
Effect of Acid Deposition on Urban Dew Chemistry in Yokohama, Japan. / Okochi, Hiroshi; Kajimoto, Takuya; Arai, Yukiko; Igawa, Manabu.
In: Bulletin of the Chemical Society of Japan, Vol. 69, No. 11, 11.1996, p. 3355-3365.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effect of Acid Deposition on Urban Dew Chemistry in Yokohama, Japan
AU - Okochi, Hiroshi
AU - Kajimoto, Takuya
AU - Arai, Yukiko
AU - Igawa, Manabu
PY - 1996/11
Y1 - 1996/11
N2 - 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.
AB - 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.
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UR - http://www.scopus.com/inward/citedby.url?scp=0001431702&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0001431702
VL - 69
SP - 3355
EP - 3365
JO - Bulletin of the Chemical Society of Japan
JF - Bulletin of the Chemical Society of Japan
SN - 0009-2673
IS - 11
ER -