Uptake study of ClONO2 and BrONO2 by Halide containing droplets
Item
Title (Dublin Core)
Uptake study of ClONO2 and BrONO2 by Halide containing droplets
Description (Dublin Core)
The uptake kinetics of gaseous ClONO<sub>2</sub> and BrONO<sub>2</sub> on aqueous surfaces were measured, as a function of temperature and liquid composition (pure water and NaCl or NaBr containing solutions) using the droplet train technique coupled to a mass spectrometer. The uptake kinetics are driven by the reactivity of these gases and, for both compounds, the uptake rates on pure water or on NaCl solutions (0.1M) are comparable. The uptake coefficient γ of ClONO<sub>2</sub> does not depend on the temperature while that of BrONO<sub>2</sub> increases slightly when the temperature is raised from 272 to 280K. For ClONO<sub>2</sub> and BrONO<sub>2</sub>, the uptake rates increase on NaBr-doped droplets, enabling the estimation of the mass accommodation coefficient α. The corresponding values for α are 0.108±0.033 for ClONO<sub>2</sub> and 0.063±0.021 for BrONO<sub>2</sub> where the statistical errors correspond to ±2σ. <P style="line-height: 20px;"> The reactions of ClONO<sub>2</sub> and BrONO<sub>2</sub> on NaCl solutions lead respectively to the formation of Cl<sub>2</sub> and BrCl. The uptake of ClONO<sub>2</sub> on NaBr solutions generates BrCl as primary product, which in turn can react with NaBr to produce Br<sub>2</sub>. As expected, the only product of BrONO<sub>2</sub> reaction on NaBr solution is Br<sub>2</sub>.
Creator (Dublin Core)
Deiber, G.
George, Ch.
Calvé, S.
Schweitzer, F.
Mirabel, Ph.
Date (Dublin Core)
2018-06-28
Type (Dublin Core)
Text
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
10.5194/acp-4-1291-2004
https://acp.copernicus.org/articles/4/1291/2004/
Source (Dublin Core)
eISSN: 1680-7324
Language (Dublin Core)
eng
