Mass spectrometry of interfacial layers during fast aqueous aerosol/ozone gas reactions of atmospheric interest
Abstract
The oxidations of sulfite and iodide in the interfacial layers of aqueous microdroplets exposed to O_3(g) for 1 ms are investigated by online mass spectrometry of the electrostatically ejected anions. S(IV) oxidation losses in Na_2SO_3 microdroplets are proportional to [S(IV)] [O_3(g)] up to ∼90% conversion. I^− is more abundant than HSO_3^- in the interfacial layers of equimolar (Na_2SO_3 + NaI) microdroplets and ∼3 times more reactive than image toward O_3(aq) in bulk solution, but it is converted with minimal loss to I_3^- and IO_3^- plus a persistent ISO_3^- intermediate. These observations reveal unanticipated interfacial gradients, reactivity patterns and transport phenomena that had not been taken into account in previous treatments of fast gas–liquid reactions.
Additional Information
© 2008 Elsevier B.V. Received 30 October 2007; in final form 20 February 2008; Available online 4 March 2008. This project was supported by the National Science Foundation (ATM-0714329). S.E. is grateful to Prof. Yutaka Matsumi (Solar-Terrestrial Environment Laboratory, Nagoya University), Prof. Masahiro Kawasaki (Department of Molecular Engineering, Kyoto University) and the JSPS Research Fellowship for Young Scientists.Additional details
- Eprint ID
- 58462
- DOI
- 10.1016/j.cplett.2008.02.075
- Resolver ID
- CaltechAUTHORS:20150623-154751358
- NSF
- ATM-0714329
- Japan Society for the Promotion of Science (JSPS)
- Created
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2015-07-29Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field