长寿区挥发性有机物来源解析与臭氧成因研究

Study on Sources Apportionment of Ambient Volatile Organic Compounds and Ozone Formation Reasons in Changshou District

该文分析了长寿区环境空气中臭氧污染的特征,探讨了气温、湿度、风速等气象条件对环境空气中臭氧浓度的影响,通过绘制EKMA曲线指出臭氧生成的主导因素。文章设置4个挥发性有机物(VOCs)监测点分析了长寿区环境空气中的VOCs含量,结果表明:含氧挥发性有机物以及芳香烃类是长寿区挥发性有机物中的主要成分,分别占总和的32.28%和25.52%,其中芳香烃对臭氧生成的贡献最大。结合PMF模型对VOCs以及臭氧进行了源解析研究,结果表明:工业排放和交通排放是长寿区环境空气中VOCs的主要来源,分别占据VOCs排放总量的56%和18%,对臭氧生成的贡献率分别为46%和25%,在此基础上提出了臭氧污染防治措施。

Characteristics of ozone pollution in Changshou District were analyzed in this paper.Influence of meteorological factors such as air temperature,humidity and wind velocity on ozone concentration were investigated.Dominant factors of ozone formation were pointed out through EKMA curve.4 VOCs monitoring point were setted for analysis the content of VOCs in ambient air of changshou district.As a result,oxygenated VOCs and aromatic were the main component of VOCs in ambient air of Changshou,accounting for 32.28%and 25.52%of the total respectively.Aromatic hydrocarbons contribute most to ozone formation.The sources of VOCs and ozone were analyzed by positive matrix factorization(PMF).The results showed that industrial and vehicle emission were the main resource of VOCs in ambient air of changshou district,accounting for 56%and 18%of total VOCs discharged,which contribute 46%and 25%ozone formation respectively.At last,some ozone pollution prevention and control measures were presented in this paper.