杭州市大气细颗粒物分粒径来源解析

doi:10.7523/j.issn.2095-6134.2014.03.011

摘要/Abstract

摘要：

利用安德森分级采样器采集大气细颗粒物样品，分析它们的质量浓度及无机元素、水溶性离子和碳等组分的含量.采用OC/EC最小比值法确定二次有机碳对细颗粒物的贡献，重新构建受体化学成分谱.使用化学质量平衡模型对杭州市区大气细颗粒物进行分粒径来源解析.结果表明，在小粒径段中，二次粒子和机动车尾气尘为主要贡献源类；在粗粒径段中，城市扬尘、建筑水泥尘和煤烟尘的贡献逐渐增多，二次粒子与机动车尾气尘的总分担率下降到50%左右.

关键词: 大气细颗粒物, 分粒径来源解析, 化学质量平衡模型, 二次有机碳

Abstract:

Samples of ambient fine particulate matter were collected using Andersen cascade sampler. The contributions of secondary organic carbon (SOC) to particulate matter in different sizes were determined by the "OC/EC minimum ratio" technique. The sources of size-resolved fine particulate matter in Hangzhou were analyzed using the CMB model. The results showed that secondary aerosol and vehicle exhaust were the major sources in small-size segment. The contribution of suspended dust, cement dust, and fly ash gradually increased in coarse segment, and the contribution of secondary particles and vehicle exhaust dropped to about 50%.

Key words: fine particulate matter, size-resolved source apportionment, CMB, SOC

中图分类号:

X513

沈建东, 焦荔, 徐昶, 何曦, 应方, 洪盛茂. 杭州市大气细颗粒物分粒径来源解析[J]. 中国科学院大学学报, 2014, 31(3): 367-373.

SHEN Jiandong, JIAO Li, XU Chang, HE Xi, YING Fang, HONG Shengmao. Source apportionment of size-resolved ambient fine particulate matter in Hangzhou[J]. , 2014, 31(3): 367-373.

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