Journal of Atmospheric Chemistry

, Volume 71, Issue 1, pp 33–53 | Cite as

Time-dependent uptake of NO3 by sea salt

  • Vladislav V. Zelenov
  • Elena V. Aparina
  • Andrey V. Ivanov
Article
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Abstract

Using a coated-insert flow tube reactor coupled to a low-energy electron-impact mass spectrometer with molecular beam sampling, we studied uptake of NO3 by sea salt at room temperature and [NO3] = 8⋅1011 − 4⋅1013 molecule cm−3. The radical uptake coefficient γ(t) is time dependent: its initial value (γ ini) decreases exponentially with the characteristic time (τ) to its steady-state value (γ ss) at given [NO3]. The parameters γ ini, γ ss and τ depend on [NO3], whereas γ ss is water vapor independent at [H2O] = 8⋅1012 − 1.6⋅1015 molecule cm−3 and RH ≤ 0.5 %. HCl and NO2 are uptake products detected in the gas phase. We used these findings to estimate γ values under tropospheric conditions for urban coastal and remote marine environments: at high NO3 (~90 ppt), the time dependence becomes important, and the γ value averaged over the aerosol lifetime is 4⋅10−3; at low NO3 (~1 ppt), the radical uptake is time independent and proceeds faster with γ ini = 8⋅10−3

Keywords

Sea salt aerosol NO3 Heterogeneous reactivity Kinetics Uptake coefficient Rate constant Langmuir coefficient 
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Copyright information

© Springer Science+Business Media Dordrecht 2014

Authors and Affiliations

  • Vladislav V. Zelenov
    • 1
  • Elena V. Aparina
    • 1
  • Andrey V. Ivanov
    • 2
  1. 1.The Branch of Talrose Institute for Energy Problems of Chemical PhysicsRussian Academy of Sciences (BINEPCP RAS)ChernogolovkaRussian Federation
  2. 2.Department of Chemistry and BiochemistryUniversity of California-San DiegoLa JollaUSA

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