摘要：建立了一套基于放射性碳及稳定碳同位素比定量估算大气细颗粒物PM_2.5(动力学直径da≤2.5μm)中有机污染物来源的方法,并用该方法初步估算上海市宝山地区大气PM_2.5中有机污染物的来源。结果表明,宝山区冬季大气颗粒物中有机污染物的来源主要来自石化产物,占到了总量的64.7%,而非石化产物只有35.3%;其中石化燃料产物分担率中主要是机动车尾气的贡献,非石化燃料产物分担率中可能主要是二次扬尘。

关键词：大气颗粒物；有机污染物；碳同位素

Abstract：The specific activities of ¹⁴C and stable carbon isotopic compositions were used to partition the sources. The fractional distribution of the sources of organic pollutants in fine airborne particles PM_2.5,collected from Baoshan District,Shanghai City,was also primarily determined. The organic pollutants in the PM_2.5 originated mainly from the fossil products, whose accounted for 64.7% of the total organic pollutants while the non-fossil products accounted for 35.3%. The vehicle exhaust was main origination of the fossil products while the second fugitive dust for the non-fossil products.

Keywords：airborne particles; organic pollutant; carbon isotopic composition