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Detailed Reference Information |
Wine, P.H., Tang, Y., Thorn, R.P., Wells, J.R. and Davis, D.D. (1989). Kinetics of aqueous phase reactions of the SO4 radical with potential importance in cloud chemistry. Journal of Geophysical Research 94: doi: 10.1029/88JD03648. issn: 0148-0227. |
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A laser flash photolysis/long path absorption technique has been employed to study at 298 K the kinetics of aqueous phase reactions of the SO-4 radical with a number of species commonly found in cloud water. Much lower radical concentrations were employed than in all previous direct studies of SO-4 reaction kinetics. In the zero ionic strength limit, rate coefficients for SO-4 reactions with the anions HSO-3, Cl-, NO-2, HCOO-, and CH-3COO are found to be 7.5¿108, 2.6¿108, 9.8¿108, 1.1¿108, and 3.7¿106 M-1 s-1, respectively. Rate coefficients for SO4 reactions with the neutral species H2O2, CH3OH, HCOOH, and CH3COOH are found to be 1.2¿107, 8.8¿106, 4.6¿105, and 1.4¿104 M-1 s-1, respectively. For many of the reactions studied, agreement with previously reported data is poor. Of particular importance for cloud chemistry is the fact that the SO-4+HSO-3 reaction proceeds more slowly than previously believed, while the SO-4+Cl- reaction is somewhat faster tan previously thought. Incorporation of these results into cloud chemistry models should reduce the calculated effeciency of free radical chain reactions as an oxidation mechanism for S IV. ¿ American Geophysical Union 1989 |
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Abstract |
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Keywords
Atmospheric Composition and Structure, Cloud physics and chemistry, Atmospheric Composition and Structure, Pollution—urban and regional, Atmospheric Composition and Structure, Troposphere—composition and chemistry |
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Publisher
American Geophysical Union 2000 Florida Avenue N.W. Washington, D.C. 20009-1277 USA 1-202-462-6900 1-202-328-0566 service@agu.org |
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