Weak acids enhance halogen activation on atmospheric waters surfaces

Sayaka Hayase, Akihiro Yabushita, Masahiro Kawasaki, Shinichi Enami, Michael R. Hoffmann, Agustín J. Colussi

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

We report that rates of I2(g) emissions, measured via cavity ring-down spectroscopy, during the heterogeneous ozonation of interfacial iodide: I-(surface, s) + O3(g) + H+(s) →→ I2(g), are enhanced several-fold, whereas those of IO · (g) are unaffected, by the presence of undissociated alkanoic acids on water. The amphiphilic weak carboxylic acids appear to promote I2(g) emissions by supplying the requisite interfacial protons H+(s) more efficiently than water itself, at pH values representative of submicrometer marine aerosol particles. We infer that the organic acids coating aerosol particles ejected from oceans topmost films should enhance I2(g) production in marine boundary layers.

Original languageEnglish
Pages (from-to)4935-4940
Number of pages6
JournalJournal of Physical Chemistry A
Volume115
Issue number19
DOIs
Publication statusPublished - May 19 2011

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Halogens
Aerosols
surface water
halogens
aerosols
Chemical activation
activation
acids
Ozonization
Acids
Water
supplying
Organic acids
Iodides
Carboxylic Acids
Carboxylic acids
carboxylic acids
iodides
water
Protons

All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry

Cite this

Hayase, S., Yabushita, A., Kawasaki, M., Enami, S., Hoffmann, M. R., & Colussi, A. J. (2011). Weak acids enhance halogen activation on atmospheric waters surfaces. Journal of Physical Chemistry A, 115(19), 4935-4940. https://doi.org/10.1021/jp2021775

Weak acids enhance halogen activation on atmospheric waters surfaces. / Hayase, Sayaka; Yabushita, Akihiro; Kawasaki, Masahiro; Enami, Shinichi; Hoffmann, Michael R.; Colussi, Agustín J.

In: Journal of Physical Chemistry A, Vol. 115, No. 19, 19.05.2011, p. 4935-4940.

Research output: Contribution to journalArticle

Hayase, S, Yabushita, A, Kawasaki, M, Enami, S, Hoffmann, MR & Colussi, AJ 2011, 'Weak acids enhance halogen activation on atmospheric waters surfaces', Journal of Physical Chemistry A, vol. 115, no. 19, pp. 4935-4940. https://doi.org/10.1021/jp2021775
Hayase, Sayaka ; Yabushita, Akihiro ; Kawasaki, Masahiro ; Enami, Shinichi ; Hoffmann, Michael R. ; Colussi, Agustín J. / Weak acids enhance halogen activation on atmospheric waters surfaces. In: Journal of Physical Chemistry A. 2011 ; Vol. 115, No. 19. pp. 4935-4940.
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