二氧化硫(SO_2)为无色透明气体,有刺激性气味,溶于水、乙醇和乙醚[1]。二氧化硫会导致呼吸道炎症、肺气肿、眼结膜炎症等[2]。一些工业企业如化工、皮革、冶金、建材、火电厂等行业在生产过程中都有可能产生二氧化硫[3]。SO_2本身具有不稳定性,会进一步转化成硫酸,而硫酸在潮湿的空气中又会形成酸 Sulfur dioxide (SO 2) is a colorless, transparent gas with an irritating odor, soluble in water, ethanol and ether [1]. Sulfur dioxide can cause respiratory inflammation, emphysema, conjunctival inflammation [2]. Some industrial enterprises such as chemical industry, leather, metallurgy, building materials, thermal power plants and other industries are likely to produce sulfur dioxide in the production process [3]. SO 2 itself has instability, will be further converted into sulfuric acid, and sulfuric acid in the humid air will form acid