哈尔滨大气中PAHs的污染源解析

Pollution Source Apportionment of PAHs in Air of Harbin

通过将比值法、主成分分析和正定矩阵分析法相结合对大气中PAHs的污染源进行了解析,结果表明,煤的燃烧和汽车尾气的排放是PAHs的主要污染源,冬季,煤的燃烧是主要污染源,其贡献率为60.6%,其次为汽车尾气排放(34.4%),其他季节,汽车尾气的排放和燃煤污染是主要的污染源,其贡献率分别为59.3%和17.1%。通过等效毒性当量因子计算得到,哈尔滨大气中BaP当量浓度冬季为7.751 9 ng/m3,其他季节为0.688 6 ng/m3,均符合中国规定的10 ng/m3。

The positive matrix factorization（PMF） and principal component analysis（PCA）will be used to investigate the sources of PAHs.The results showed that the coal combustion and vehicle emission were two primary sources of PAHs in Harbin.In heating season,the coal combustion was the predominant source,accounting for 60.6% of ∑16PAHs,followed by vehicle emission（34.4%）.In non-heating season,the two primary sources were vehicle emission and coal combustion,accounting for 59.3% and 17.1% of ∑16PAHs,respectively.Through the equivalent of TEF calculation,the equivalent concentration of BaP in the heating period of Harbin is 7.759ng/m3,and 0.6886ng/m3 in the non-heating period.They are under the standard of 10ng/m3 in China.