The enhanced dissolution of some chlorinated hydrocarbons and monocyclic aromatic hydrocarbons in rainwater collected in Yokohama, Japan

Hiroshi Okochi*, Daisuke Sugimoto, Manabu Igawa

*この研究の対応する著者

研究成果: Article査読

21 被引用数 (Scopus)

抄録

By simultaneous sequential sampling of gas and rainwater from 1999 to 2000 in the campus of Kanagawa University in Yokohama, Japan, we investigated the wet-scavenging process of volatile organic compounds, some chlorinated hydrocarbons (CHs) and monocyclic aromatic hydrocarbons (MAHs), via rain droplets. Their volume-weighted mean concentrations in 125 rainwater were 4.98nM for dichloromethane, 3.71nM for toluene, 2.00nM for benzene, 0.93nM for 1,2-dichloroethane, 0.62nM for o-xylene, 0.57nM for m,p-xylene, 0.51nM for p-dichlorobenzene, and 0.35nM for trichloromethylene. Their rainwater concentrations did not depend on the rainfall intensity, and the temporal variation of their concentrations was similar to that of gas-phase concentrations. The dissolution of CHs and MAHs into rainwater, however, was larger than expected from their gas-phase concentrations at the ground and their temperature-corrected Henry's law constants. A simple below-cloud scavenging model, which was developed by Levine and Schwartz (Atmos. Environ. 16 (1982) 1725) could explain the independence of the rainfall intensity but not explain their enhanced dissolution in rainwater. The results of this study indicate the estimated concentrations, which were based on the Henry's law equilibrium, considerably underestimate the wet-deposition fluxes of CHs and MAHs onto the ground.

本文言語English
ページ(範囲)4403-4414
ページ数12
ジャーナルAtmospheric Environment
38
26
DOI
出版ステータスPublished - 2004 8月
外部発表はい

ASJC Scopus subject areas

  • 環境科学(全般)
  • 大気科学

フィンガープリント

「The enhanced dissolution of some chlorinated hydrocarbons and monocyclic aromatic hydrocarbons in rainwater collected in Yokohama, Japan」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル