Aqueous oxidation of SO2by hydrogen peroxide

摘要: The aqueous oxidation of S(IV) by H2O2 is one the principal paths acid formation in atmosphere. Several investigators have measured rate constant for reaction: (a) + → H2SO4(a), as a function temperature and pH. reactant concentrations used, however, were several orders magnitude greater than those found precipitation or cloud particles. We at more typical environmental using different analytical technique which excess (10−6 to 10−5M) was reacted with (∼10−7M). followed decay concentration time an luminol-chemiluminescent instrument. lower we use obviate buffers our working pH range 4.0 5.8. Our measurements S(IV)-H2O2 substantial agreement previous measurements. noted first order dependence hydrogen ion 22°C find results can be represented k = (8.03 ± 0.18) × 107[H+] dm3 mole−1 s−1 when between