大气中铁、锰液相催化氧化二氧化硫动力学

KINETICS OF S(Ⅳ) OXIDATION CATALYZED BY Fe 3+ AND Mn 2+ IN ATMOSPHERIC AQUEOUS PHASE

研究了ｐＨ在３—５的范围内，大气浓度水平下，铁、锰和铁锰共存时的液相催化氧化Ｓ（Ⅳ）的动力学．发现在不同的条件下反应级数、表观反应速率常数和活化能不同，证实了铁、锰对Ｓ（Ⅳ）的液相催化氧化有明显的协同作用，并给出了许多反应体系的经验速率表达式．

The kinetics of oxidation of S(Ⅳ) catalyzed by Fe 3+ and Mn 2+ , either separately or together, in aqueous solution was studied over pH range of 3—5 at atmospheric concentrations of species. The reaction orders, apparent reaction rate constants and activation energies are different under different conditions. The catalytic synergism of S(Ⅳ) oxidation between Fe 3+ and Mn 2+ was confirmed. The empirical rate expressions were obtained for many reaction systems.