Open AccessUptake of gas‐phase SO 2 in aqueous sulfuric acid: Oxidation by H 2 O 2 , O 3 , and HONO
Author(s) -
Rattigan O. V.,
Boniface J.,
Swartz E.,
Davidovits P.,
Jayne J. T.,
Kolb C. E.,
Worsnop D. R.
Publication year - 2000
Publication title -
journal of geophysical research: atmospheres
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/2000jd900372
Subject(s) - sulfuric acid , oxidation state , aqueous solution , analytical chemistry (journal) , phase (matter) , gas phase , chemistry , inorganic chemistry , environmental chemistry , catalysis , organic chemistry
Uptake of SO 2 (g) was measured as a function of sulfuric acid concentration in the range pH = 1 to 70 wt% H 2 SO 4 at 293 K. Uptake studies were carried out in the presence of solvated H 2 O 2 , O 3 , HONO, NO 2 , and HNO 3 . The studies yielded Henry's law coefficients for SO 2 which were in accord with previous measurements. The results provided first time determinations at high acidities of rate coefficients for the reaction of SO 2 with H 2 O 2 , O 3 , and HONO in the solvated state. The observed SO 2 (g) uptake was consistent with bulk phase oxidation processes. The measured rate coefficients were used to evaluate the role of heterogeneous interactions with the selected species for aerosol formation in aircraft plumes. Calculations show that these interactions are insignificant compared to gas phase oxidation by the OH radical.