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环境化学  2015 

不同高度大气颗粒物中多环芳烃的粒径分布

Keywords: 大气颗粒物,多环芳烃,垂直分布,粒径分布

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Abstract:

在天津地区20m,40m和60m三个不同高度同步采集冬季大气颗粒物中PM10样品,测定了16种多环芳烃(PAHs)含量不同高度PM10中PAHs的含量均表现出大气颗粒物中随高度先增后降的趋势,颗粒物质量中值直径(MMD)也呈现类似规律,但PAHs总浓度的MMD则呈向上递增的趋势不同高度PAHs的粒径分布差别不大,高分子量的PAHs主要集中在空气动力学直径Dp2μm的粗颗粒上低分子量的PAHs相对较多.

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