Evaluation of the rate of uptake of nitrogen dioxide by atmospheric and surface liquid water

作者：Yin‐Nan Lee, Stephen E. Schwartz · 发表于：Journal of Geophysical Research Atmospheres · 年份：1981 · DOI：10.1029/jc086ic12p11971 · 被引用次数：168 · 研究领域：Atmospheric chemistry and aerosols、Atmospheric and Environmental Gas Dynamics、Marine and coastal ecosystems

The rate of uptake of NO2by liquid water according to (R1), 2NO2(g) + H2O(1) → 2H++ NO3−+ NO2−, is shown to be unaffected by O2(0.2 atm). Hence the rate constant and Henry's law solubility constant of NO2previously obtained may be employed to evaluate the rates of aqueous phase reactions of NO2in the ambient atmosphere. Reactions (R1) and (R2), NO2(g) + NO(g) + H2O(1) → 2H++ 2NO2−, are quite slow at representative atmospheric partial pressures and cloud liquid water content; the characteristic times range upward from 103–104hours at 10−7atm, increasing with decreasing partial pressures of the gases. Direct acidification of cloud liquid water by (R1) or (R2) is also unimportant. Catalytic enhancement of (R1) is potentially important for catalyst concentrations of order 10−7M, assuming sufficiently fast rate constants (∼108M−ls−1). Iron‐catalyzed reaction in particular, however, is found to be unimportant. Reaction of NO2with dissolved S(IV) is potentially mportant, based upon an assumed upper limit rate constant of 2.5×107M−1s−1. Deposition of NO2to surface (ocean or lake) water is shown to be controlled by aqueous phase mass transport and/or reaction and is much slower than heretofore assumed.