The influence of light intensity,SO2, NOx and C3H6 on sulfate aerosol formation |
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| Authors: | Menachem Luria Geula Sharf |
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| Institution: | (1) Environmental Sciences Division, School of Applied Science, The Hebrew University, Jerusalem, Israel;(2) Present address: NOAA-Air Quality Division R/E/AR 5, 325 Broadway, 80303 Boulder, CO, U.S.A. |
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| Abstract: | The photochemical oxidation of SO2 in the presence of NO and C3H6 was studied in a 18.2 liter pyrex reactor. When light intensity, irradiation time and SO2 concentration were constant, SO4
2- concentration, derived from the total volume of aerosol produced, peaked when C3H6]/NO] was approximately 6.0. Another increase im SO4
2- formation was reached at very high ratios (>50). The experimental observations are consistent with the two SO2 oxidation mechanisms. At low C3H6]/NO] ratios, the processes proceed via the HO–SO2 reaction, while at high ratios the O3–C3H6 adduct is assumed to oxidize SO2 to produce SO4
2- aerosols. |
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| Keywords: | Aerosol volume SO4
2- aerosol SO2 oxidation HC/NO
x
ratios HO radical |
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