南京北郊冬季PM_(2.5)中芳香酸的测定及来源解析  

Determination and Source Apportionment of Aromatic Acids in PM_(2.5) from the Northern Suburb of Nanjing in Winter

作　　者：张亚飞[1,2] 马嫣[1,2] 亓鲁[3] 王振 王利朋[1,2] 朱麟[1,2] 

机构地区：[1]南京信息工程大学环境科学与工程学院,南京210044 [2]江苏省大气环境监测与污染控制高技术研究重点实验室,南京210044 [3]南京信息工程大学大气物理学院,南京210044 [4]常州市环境监测中心,常州213001

出　　处：《环境科学》2016年第7期2436-2442,共7页Environmental Science

基　　金：国家自然科学基金项目(21377059;41275142;41030962);江苏省自然科学基金项目(BK2012861)

摘　　要：于2014年12月采集了南京北郊大气中PM_(2.5)样品,优化了LC-MS分析大气PM_(2.5)中芳香酸的定量方法,测定了其中的芳香酸、主要水溶性离子、有机碳和元素碳的浓度.定量结果表明,所测定5种芳香酸的总平均浓度为(50.01±16.05)ng·m^(-3),其中对苯二甲酸、邻苯二甲酸、偏苯三甲酸、4-甲基邻苯二甲酸与间苯二甲酸的平均浓度依次为(34.54±12.79)、(8.14±3.34)、(2.27±1.39)、(1.68±0.77)和(1.08±0.43)ng·m^(-3).应用主因子分析/绝对主因子得分(PCA/APCS)受体模型对颗粒物进行了来源解析.源解析结果表明,南京北郊冬季PM_(2.5)中的邻苯二甲酸、偏苯三甲酸、4-甲基邻苯二甲酸主要来自大气中二次转化;其中偏苯三甲酸有少部分来源于机动车尾气的一次排放;间苯二甲酸除来自于二次气溶胶源和生物质燃烧外,还有少部分来自机动车尾气的一次排放,而对苯二甲酸则主要来源于生物质燃烧和机动车尾气的一次排放.Atmospheric particulate samples of PM2.5 were collected from the northern suburb of Nanjing in December, 2014, and a LC- MS method was optimized for the determination of aromatic acids in PM2. 5; The concentrations of major water-soluble ions, organic carbon and elemental carbon were also determined. The quantification results showed that the average total concentration of five aromatic acids we have determined was （50. 01 ± 16.05） ng·m -3, and the average concentrations of terephthalic acid, phthalic acid, trimellitie acid, 4-methylphthalic acid and iso-phthalic acid were （ 34.54 ± 12.79 ）, （ 8. 14 ±3.34）, （2.27± 1.39）, （ 1.68 ± 0.77 ） and （1.08±0.43） ng·m-3, respectively. The different source apportionments of atmospheric particulate were analyzed by principal component analysis/absolute principal component scores （PCA/APCS） receptor model. The results of source apportionment showed that the main sources of Phthalie acid, Trimellitic acid and 4-methylphthalic acid were mainly secondary transformation, and primary emissions such as vehicle exhaust contributed less to Trimellitic acid; Secondary transformation and biomass burning made the most significant contributions to iso-Phthalic acid and vehicle exhaust contributed less; The sources of Terephthalic acid were primary emissions such as biomass burning and vehicle exhaust.

关 键 词：芳香酸 LC-MS 相关性分析 主因子分析/绝对主因子得分 源解析 

分 类 号：X513[环境科学与工程—环境工程]