株洲市工业区大气中SO2转化速率的研究

在湖南省株洲市工业区的下风向布点，同时测定大气中ＳＯ２的浓度、ＴＳＰ和＜０．２５μｍ细粒子中ＳＯ２－４的浓度．结果表明，大气中ＳＯ２浓度随着离污染源距离的增加迅速下降，和ＳＯ２相比，颗粒物中ＳＯ２－４浓度随距离的增加而降低的程度要慢得多．同步测定的ＳＯ２浓度和细粒子ＳＯ２－４浓度有显著的相关关系．根据风向、风速和新产生的细粒子中的ＳＯ２－４浓度及大气中ＳＯ２的浓度计算了株洲教育学院处ＳＯ２的转化速率，春季湿度大，ＳＯ２转化速率也大，为４．８％／ｈ，秋季湿度小，ＳＯ２的转化速率变低，为１．５％／ｈ．春季中路铺ＳＯ２转化速率为３．１％／ｈ．

Study on Oxidation Rate of SO2 in Zhuzhou Industrial Region,Hunan Province

The sampling sites located downwind of Zhuzhou industrial region are Zhuzhou Education Institute,Zhonglupu and Heng Mountain.Gaseous SO₂,SO₄^2- in TSP and fine particle were measured at same time.The results point out that concentration of SO₂ decreased rapidly with increasing distance of sampling site from emission source,but SO₄^2- concentration in TSP and fine particle decreased much slowly than SO₂ soncentration. A marked correlativity between the concentration of SO₂ and SO₄^2- measured simultaneously was observed.Based on wind velocity,the concentrations of SO₂ and new formed SO₄^2- in fine particle the oxidation rate of SO₂ in Zhuzhou Education Institute was calculated.In spring,high oxidation rate of SO₂ to be 4.8%/h was examined with RH>90%.In fall,oxidation rate of SO₂ decreased to be 1.5%/h with about RH 50%.