【摘 要】
：
采样分析了上海中心城区冬季(2009年1～2月)PM2.5中有机碳(OC)和元素碳(EC)组分,并对其污染和变化特征进行了分析.结果表明,上海中心城区范围内OC、EC浓度空间分布无明显差异;O
【机 构】
：
上海市环境监测中心,上海200030
论文部分内容阅读
采样分析了上海中心城区冬季(2009年1～2月)PM2.5中有机碳(OC)和元素碳(EC)组分,并对其污染和变化特征进行了分析.结果表明,上海中心城区范围内OC、EC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％;OC浓度(ρ(OC))/EC浓度(ρ(EC))较高,平均值为5.73,且存在一定程度的二次有机物污染;OC和EC有着较好的相关性,两者在一定程度上有着相同的源;春节前后,总碳(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.
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