摘要：为了解析河南省开封市大气扬尘颗粒物的来源,对开封市的扬尘源成分谱和大气颗粒物PM₁₀进行采样,提取城市扬尘源中各单一源类的标识物,分析PM₁₀化学组分,应用化学质量平衡模型(CMB)和二重源解析技术进行定性和定量分析。结果表明:开封市PM₁₀污染严重,主要是城市扬尘,对环境空气中颗粒物的贡献在27. 7%,是首要污染因素;二次颗粒物对PM₁₀的贡献率达到26. 92%;汽车尾气尘对PM₁₀的贡献率在11. 29%。

关键词：开封；大气扬尘；PM₁₀；化学质量平衡模型；二重源解析技术

Abstract: In order to analyze the source of airborne dust particles in Kaifeng city，Henan province，the paper mainly focuses on the composition spectrum of the dust source and the atmospheric particulate matter PM₁₀ sampling．The markers of each single source in the urban dust source were extracted，and the chemical components of PM₁₀ were analyzed．The chemical mass balance (CMB) model and the improved source apportionment technique were used to characterize．The results show that the PM₁₀ pollution in Kaifeng city is serious，which is mainly caused by urban dust．The contribution rate of secondary particles to PM10 is 26．92% ．The contribution rate of vehicle exhaust dust to PM₁₀ is 11． 29% ． 

Keywords: Kaifeng city; atmospheric dust; PM₁₀ ; chemical mass balance model; Improved source apportionment technique