Kinetics of the Reactive Dissolution of the Nitrogen Oxides and Oxyacids in Aqueous Solution

摘要

This report consists of a critical review of the literature pertinent to the mechanism and kinetics of dissolution of gaseous nitrogen oxides into aqueous solution. Kinetic expressions applicable to mixed-phase reactions generally are presented as are specific expressions pertinent to aqueous-phase reactions of the nitrogen oxides. Kinetic studies reviewed include indirect studies, direct measurements of aqueous-phase reaction rates, and measurements of mixed-phase kinetics. The results of these various studies are compared to obtain recommended values for the pertinent equilibrium and kinetic constants at 25 exp 0 C, as follows: For the Henry's law coefficient of NO sub 2 , (1.0 +- 0.3) x 10 exp -2 M atm exp -1 ; for the rate constant of the aqueous phase reaction 2NO sub 2 /sub (a)/ (+H sub 2 O/sub (l)/) - > 2 H exp + + NO sub 2- + NO sub 3- , (0.7 +- 0.35) x 10 exp 8 M exp -1 sec exp -1 ; for the rate constant of the reaction NO/sub (a)/ + NO sub 2 /sub (a)/ (+H sub 2 O/sub (l)/) - > 2H exp + + 2NO sub 2- , (0.3/sub exp - 0.2//sup +0.7/) x 10 exp 8 M exp -1 sec exp -1 . Other studies pertinent to aqueous phase reactionsof NO sub 2 and NO with water or aqueous solution are also reviewed. (ERA citation 07:044619)