Formation of molecular chlorine in dark condition: Heterogeneous reaction of ozone with sea salt in the presence of ferric ion

Details Formation of molecular chlorine in dark condition: Heterogeneous reaction of ozone with sea salt in the presence of ferric ion Formation of molecular chlorine in dark condition: Heterogeneous reaction of ozone with sea salt in the presence of ferric ion

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001georl..28.4433s&link_type=abstract

Geophysical Research Letters, Volume 28, Issue 23, p. 4433-4436

Physics

4

Atmospheric Composition And Structure, Atmospheric Composition And Structure: Aerosols And Particles, Atmospheric Composition And Structure: Chemical Kinetic And Photochemical Properties, Atmospheric Composition And Structure: Troposphere-Composition And Chemistry

Scientific paper

Uptake coefficients of O3 on NaCl and synthetic sea salt (SSS) were found to be enhanced from <10-5 to ~3.5×10-2 in the presence of water-soluble Fe3+ in the Fe/Na weight ratio larger than 0.1 %. Cl2 release was observed without radiation in the reaction of O3 and a FeCl3/NaCl mixture with surface adsorbed water at the yields of 0.48 and 0.28 for Fe/Na ratio of 1.0 and 0.5 weight %, respectively. Only Br2 release was observed for a FeCl3/SSS sample. These results imply that when bromide is deficient in sea salt, Cl2 would be released from the sea salt with the coexistence of Fe3+. The estimate was made to show that the Cl2 releasing rate can be high enough to explain sporadically observed Cl2 at nighttime in a coastal area.

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