Nitrogen dioxide and sea salt particles-A laboratory study

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The reaction between NO2at sub-ppm levels and wet or dry sea salt particles was studied using a thermostatted flow reactor. The results indicate that the major pathway for nitrogen dioxide reaction, both for dry particles and droplets, is 2NO2(g,aq)+Cl-(s,aq)→NO3-(s,aq)+NOCl (g). The reaction between dry sea salt aerosol and NO2is rapid but ceases when less than a monolayer of NaNO3has been formed. The reaction between near-saturated sea salt droplets and NO2appears to proceed via a liquid-phase process analogous to the reaction between dry sea salt and NO2. The liquid reaction has a potential to form 0.003 μg NO3-m-3h-1at conditions typical for the polluted marine atmosphere. If NOCl, produced in the sea salt droplets, survives hydrolysis it may give a significant contribution to atomic chlorine via photolysis. © 1995.




Karlsson, R., & Ljungström, E. (1995). Nitrogen dioxide and sea salt particles-A laboratory study. Journal of Aerosol Science, 26(1), 39–50.

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