大气中SO_2的液相氧化研究

Study of Aqueous-phase Oxidation for SO_2 in the Atmosphere

大气中SO_2液相氧化是形成酸雨的重要途径,降雨中含有各种无机离子和有机物质,它们可能催化或抑制液相氧化反应的进行。本文根据四川酸雨样品组成,进行了SO_2在模拟雨水及实际雨水中的氧化实验,考查了V,Fe,Mn等离子对SO_2氧化的催化作用,H_2O_2对SO_2的氧化以及降水中有机物质甲醛对各反应的影响。实验结果为了解酸雨的成固。研究酸雨控制对策提供了科学依据。

The aqueous sulphur dioxide oxidation is an important way to result in the acidulation of cloud, mist and rain. The inorganic ions and oganic compounds in rain water may accelerate or inhibit the reaction. Based on the components of the acid rain samples in Sichuan province, the experiments of SO_2 oxidization in both simulated and natural rain water have been performed. The catalysis of V^(5+), Mn^(2+), Fe^(3+)on SO_2 oxidation, the oxidization of hydrogen peroxide for SO_2 and the effects of formaldehyde on these reactions have been studied. The results provide the scientific basis for clarifying the mechanism of acid rain and putting forward its countermeasures.