Conversion of gaseous nitrogen dioxide to nitrate and nitrite on aqueous surfactants

Takashi Kinugawa, Shinichi Enami, Akihiro Yabushita, Masahiro Kawasaki, Michael R. Hoffmann, Agustín J. Colussi

研究成果: ジャーナルへの寄稿記事

27 引用 (Scopus)

抄録

The hydrolytic disproportionation of gaseous NO2 on water's surface (2 NO2 + H2O → HONO + NO3 - + H+) (R1) has long been deemed to play a key, albeit unquantifiable role in tropospheric chemistry. We recently found that (R1) is dramatically accelerated by anions in experiments performed on aqueous microjets monitored by online electrospray mass spectrometry. This finding let us rationalize unresolved discrepancies among previous laboratory results and suggested that under realistic environmental conditions (R1) should be affected by everpresent surfactants. Herein, we report that NO2(g) uptake is significantly enhanced by cationic surfactants, weakly inhibited by fulvic acid (FA, a natural polycarboxylic acid) and anionic surfactants, and unaffected by 1-octanol. Surfactants appear to modulate interfacial anion coverage via electrostatic interactions with charged headgroups. We show that (R1) should be the dominant mechanism for the heterogeneous conversion of NO2(g) to HONO under typical atmospheric conditions throughout the day. The photoinduced reduction of NO2 into HONO on airborne soot might play a limited role during daytime.

元の言語英語
ページ(範囲)5144-5149
ページ数6
ジャーナルPhysical Chemistry Chemical Physics
13
発行部数11
DOI
出版物ステータス出版済み - 3 21 2011

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Nitrogen Dioxide
nitrogen dioxide
nitrites
Nitrites
Surface-Active Agents
Nitrates
Anions
nitrates
surfactants
1-Octanol
Soot
Anionic surfactants
Cationic surfactants
Coulomb interactions
Mass spectrometry
anions
acids
Acids
Water
soot

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

これを引用

Conversion of gaseous nitrogen dioxide to nitrate and nitrite on aqueous surfactants. / Kinugawa, Takashi; Enami, Shinichi; Yabushita, Akihiro; Kawasaki, Masahiro; Hoffmann, Michael R.; Colussi, Agustín J.

:: Physical Chemistry Chemical Physics, 巻 13, 番号 11, 21.03.2011, p. 5144-5149.

研究成果: ジャーナルへの寄稿記事

Kinugawa, Takashi ; Enami, Shinichi ; Yabushita, Akihiro ; Kawasaki, Masahiro ; Hoffmann, Michael R. ; Colussi, Agustín J. / Conversion of gaseous nitrogen dioxide to nitrate and nitrite on aqueous surfactants. :: Physical Chemistry Chemical Physics. 2011 ; 巻 13, 番号 11. pp. 5144-5149.
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