上海中心城区冬季PM_(2.5)中有机碳和元素碳组成变化特征  

Characteristics of Organic Carbon and Elemental Carbon in PM_(2.5) at Urban Centre of Shanghai in Winter

作　　者：王东方[1] 高松[1] 段玉森[1] 张元茂[1] 魏海萍[1] 

机构地区：[1]上海市环境监测中心,上海200030

出　　处：《环境科学与技术》2012年第7期55-58,72,共5页Environmental Science & Technology

基　　金：上海市环保科研项目(09-26)

摘　　要：采样分析了上海中心城区冬季2009年1月-2月PM2.5中有机碳和元素碳组分,并对其污染和变化特征进行了分析。监测分析结果表明,中心城区范围内OC、EC质量浓度空间分布无明显差异;OC、EC是PM2.5的重要组成部分,其在PM2.5中的质量分数分别为8.88%、1.49%;ρ(OC)/ρ(EC)比值较高,为5.73,且存在一定程度的二次有机污染;OC质量浓度和EC质量浓度有着很好的相关性,二者一定程度上有着相同的源;春节前后,TC浓度变化(即OC+EC)呈现明显的假日效应,机动车排放是TC的重要来源之一。Organic carbon（OC）and elemental carbon（EC）of PM2.5 in Shanghai central uban in winter was sampled and determined.Results showed that the distribution of OC and EC concentration have no difference in central urban area.OC and EC are main components in PM2.5,and the percentage of which are 8.88% and 1.49% respectively.The ratio of OC to EC is 5.73,which indicated that there is secondary organic pollution.The correlation between OC and EC mass concentration is significant,and OC and EC mainly come from the same sources.The level of total carbon（TC） concentration is affected obviously by traffic during spring festival,and the vehicles emission is one source of TC.

关 键 词：有机碳 元素碳 PM2.5 

分 类 号：X513[环境科学与工程—环境工程] X823