Impact of Secondary Organic Aerosol Tracers on Tracer-Based Source Apportionment of Organic Carbon and PM2.5: A Case Study in the Pearl River Delta, China
Impact of Secondary Organic Aerosol Tracers on Tracer-Based Source Apportionment of Organic Carbon and PM2.5: A Case Study in the Pearl River Delta, China
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DOI：
10.1021/acsearthspacechem.7b00088
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发表时间：
2017-10
期刊：
影响因子：
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通讯作者：
Qiongqiong Wang;Xiao He;X. Huang;S. Griffith;Yongming Feng;Ting Zhang;Qingyan Zhang;Dui Wu
中科院分区：
文献类型：
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作者：
Qiongqiong Wang;Xiao He;X. Huang;S. Griffith;Yongming Feng;Ting Zhang;Qingyan Zhang;Dui Wu
掌握初级有机气溶胶(POA)和次级有机气溶胶(SOA)的相对丰度是制定颗粒物(PM)控制政策的重要科学依据。利用包括POA和SOA示踪剂的PM2.5综合化学组成数据集(最值得注意的是几种生物伏安有机化合物前体的SOA示踪剂)，利用正矩阵分解(PMF)方法研究了SOA示踪剂的加入对中国珠江三角洲地区有机碳(OC)和PM2.5来源解析的影响。在含有SOA示踪剂(PMFw)的PMF运行中，分解了10个PMF因素，包括4个次要因素：(1)SOI(α-品烯、β-石竹烯和萘衍生的SOA)，(2)SOII(异戊二烯衍生的SOA)，(3)次生硫酸盐因子和(4)次生硝酸盐因子。在无SOA示踪剂的PMF测试(PMFwo)中，无法提取SOAI和SOAII因素，但其余8个源因素已得到解决。
Knowledge of the relative abundance of primary organic aerosol (POA) and secondary organic aerosol (SOA) forms an important scientific basis for formulating particulate matter (PM) control policies. Taking advantage of a comprehensive chemical composition data set of PM2.5 including both POA and SOA tracers (most notably, SOA tracers of a few biogenic voltaic organic compound precursors), we investigate the impact of inclusion of SOA tracers on the source apportionment of organic carbon (OC) and PM2.5 in the Pearl River Delta region of China using positive matrix factorization (PMF). In PMF runs incorporating SOA tracers (PMFw), ten PMF factors were resolved including four secondary factors: (1) SOA I (α-pinene, β-caryophyllene, and naphthalene-derived SOA), (2) SOA II (isoprene-derived SOA), (3) a secondary sulfate factor, and (4) a secondary nitrate factor. In PMF tests without SOA tracers (PMFwo), the SOA I and SOA II factors could not be extracted, but the remaining eight source factors were resolved....