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Competitive adsorption of atmospheric trace gases onto ice at 228 K: HNO 3 /HCl, 1‐Butanol/Acetic acid and 1‐Butanol/HCl
Author(s) -
Sokolov O.,
Abbatt J. P. D.
Publication year - 2002
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2002gl014843
Subject(s) - adsorption , butanol , acetic acid , chemistry , n butanol , nitric acid , trace gas , inorganic chemistry , hydrochloric acid , analytical chemistry (journal) , chromatography , ethanol , organic chemistry
For HNO 3 /HCl, 1‐butanol/acetic acid and 1‐butanol/HCl, adsorption isotherms have been measured at 228 K in an ice‐coated flow tube with both gases present at pressures between 10 −6 and 10 −4 torr. For HNO 3 /HCl, the uptake of each gas is lowered by the presence of the other in the surface saturated regime, but the total surface coverage of adsorbed gases is similar to the coverage of HNO 3 adsorbing alone. There is no delay to the onset of the displacement of one adsorbed acid by the other and HNO 3 bonds more strongly than HCl. Competition also occurs between 1‐butanol and acetic acid in the saturated regime of their isotherms, but not in a manner consistent with a two‐species Langmuir model. By contrast, 1‐butanol is not affected by the presence of a saturated surface of HCl.