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天津武清大气颗粒物中PAHs的污染特征和来源

Keywords: 大气颗粒物,多环芳烃,降水,来源

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Abstract:

在2003年11月于天津武清陈楼村采集了7件TSP样品(24h),测定了其中的16种优控PAHs含量。结果表明,不同样品中PAHs谱分布基本一致,表现为中高环化合物占绝对优势,与同一地区城区样品十分相似,但含量为城区样品的1/2左右。研究期间降水造成的湿沉降导致大气中颗粒物及PAHs浓度显著下降,降水过程之后很快恢复到原有水平。不同化合物相对浓度说明测得的主要源于燃煤排放。

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