Ozone Decomposition on Kaolinite as a Function of Monoterpene Exposure and Relative Humidity
| Autor: | Ryan Z. Hinrichs, Zoe L. Coates Fuentes, Theresa M. Kucinski |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Atmospheric Science
Ozone 010504 meteorology & atmospheric sciences 010402 general chemistry 01 natural sciences Decomposition 0104 chemical sciences Laminar flow reactor Trace gas Aerosol chemistry.chemical_compound chemistry Space and Planetary Science Geochemistry and Petrology Environmental chemistry Kaolinite Relative humidity 0105 earth and related environmental sciences BET theory |
| Zdroj: | ACS Earth and Space Chemistry. 2:21-30 |
| ISSN: | 2472-3452 |
| DOI: | 10.1021/acsearthspacechem.7b00107 |
| Popis: | Atmospheric processing of mineral aerosol by trace gases results in the formation of surface-adsorbed products that have the capacity to alter the chemical and physical properties of these airborne particulates. To investigate one potential impact of aerosol processing by biogenic volatile organic compounds (BVOCs), we investigated the heterogeneous decomposition of ozone on pure and monoterpene-processed kaolinite. We used a laminar flow reactor to measure O3 reactive uptake coefficients on kaolinite-coated tubes as a function of relative humidity, O3 concentration, and pre-exposure to gaseous limonene and α-pinene. At 26% RH, kaolinite has a near equivalent of a monolayer of adsorbed water, and the ozone steady-state uptake coefficient was γav = 2.9 × 10–9 assuming the BET surface area. Pre-exposing kaolinite to limonene and α-pinene increased O3 uptake coefficients by nearly 2 orders of magnitude to 2.1 × 10–7 and 2.5 × 10–7, respectively. At all humidities studied (10–50% RH), O3 uptake was at least 1... |
| Databáze: | OpenAIRE |
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