| Autor: |
Heath AA; Cain Department of Chemical Engineering, Louisiana State University, 212 Jesse Coates Hall, Baton Rouge, Louisiana 70803-7303, United States., Valsaraj KT; Cain Department of Chemical Engineering, Louisiana State University, 212 Jesse Coates Hall, Baton Rouge, Louisiana 70803-7303, United States. |
| Jazyk: |
angličtina |
| Zdroj: |
The journal of physical chemistry. A [J Phys Chem A] 2015 Aug 06; Vol. 119 (31), pp. 8527-36. Date of Electronic Publication: 2015 Jul 22. |
| DOI: |
10.1021/acs.jpca.5b05152 |
| Abstrakt: |
Atmospheric aerosols (e.g., fog droplets) are complex, multiphase mediums. Depending on location, time of day, and/or air mass source, there can be considerable variability within these droplets, relating to temperature, pH, and ionic strength. Due to the droplets' inherently small size, the reactions that occur within these droplets are determined by bulk aqueous phase and air-water interfacial conditions. In this study, the reaction of benzene and hydroxyl radicals is examined kinetically in a thin-film flow-tube reactor. By varying the aqueous volume (e.g., film thickness) along the length of the reactor, both bulk and interfacial reaction rates are measured from a single system. Temperature, pH, and ionic strength are varied to model conditions typical of fog events. Oxygen-poor conditions are measured to study oxygen's overall effect on the reaction pathway. Initial rate activation energies and the bulk aqueous phase and interfacial contributions to the overall rate constant are also obtained. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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