基于PMF模式的南京市大气细颗粒物源解析

被引:62
作者
王苏蓉 [1 ]
喻义勇 [2 ]
王勤耕 [1 ,3 ]
陆燕 [1 ]
殷丽娜 [1 ]
张予燕 [2 ]
陆小波 [2 ]
机构
[1] 南京大学环境学院
[2] 南京市环境监测中心站
[3] 大气环境与装备技术协同创新中心
关键词
源解析; 正矩阵因子分解法(PMF); 细颗粒物;
D O I
暂无
中图分类号
X513 [粒状污染物];
学科分类号
0706 ; 070602 ;
摘要
为研究南京市大气细颗粒物(PM2.5)污染来源,分别在3个点位、4个季节开展了PM2.5环境样品的采集,共获得170个有效样本对样本进行了化学成分分析,包括Al、Fe、Na、Mg、K、Ba、Li、Tl、Mn、Co、Ni、Cu、Zn、Sb、Pb、Cr、Ce、Na+、NH4+、Mg2+、Ca2+、SO42-、NO3-、Cl-、以及OC,EC,共计26种,首先采用OC/EC最小比值法估算出二次有机气溶胶(SOA)的含量;然后利用正矩阵因子分解法(PMF)对PM2.5的非SOA部分进行来源解析,共解析出6类因子:二次无机气溶胶(SIA),燃煤、机动车排放、地面扬尘、冶金和其它源,贡献率分别25.0%、23.5%、20.4%、17.1%、3.0%和11.0%;最后基于南京市SO2、NOx、VOCs三种主要前体污染物的排放量,分别对SIA和SOA在一次来源中进行再分配最终结果表明,南京市PM2.5主要来源为燃煤、机动车、扬尘、工业和其它源,其贡献率分别为29.6%,22.4%、14.6%、18.7%和14.7%.
引用
收藏
页码:3535 / 3542
页数:8
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