Contributions and source identification of biogenic and anthropogenic hydrocarbons to secondary organic aerosols at Mt. Tai in 2014.
Contributions and source identification of biogenic and anthropogenic hydrocarbons to secondary organic aerosols at Mt. Tai in 2014.
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DOI：
10.1016/j.envpol.2016.10.070
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发表时间：
2017
影响因子：
8.9
通讯作者：
Yanhong Zhu;Lingxiao Yang;K. Kawamura;Jianmin Chen;K. Ono;Xinfeng Wang;L. Xue;Wen-xing Wang
中科院分区：
文献类型：
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作者：
Yanhong Zhu;Lingxiao Yang;K. Kawamura;Jianmin Chen;K. Ono;Xinfeng Wang;L. Xue;Wen-xing Wang
对2014年夏季在泰山采集的环境细颗粒物（PM2.5）和挥发性有机化合物（VOCs）进行了分析，并利用这些数据确定了高山地区生物和人为碳氢化合物对二次有机气溶胶（SOA）的贡献及其来源和潜在来源区域。与2006年相比，2014年PM2.5气溶胶和与车辆排放相关的VOC物种中人为SOA示踪剂的浓度较高，而生物SOA示踪剂的水平较低，可能是由于生物质燃烧减少所致。使用 SOA 示踪剂和参数化方法，我们分别估计了生物源和人为 VOC 的贡献。结果表明，生物源SOA的平均浓度为1.08±0.51μg·m−3，其中异戊二烯SOA示踪剂占主导地位。在低氮和高氮氧化物条件下，人为VOC衍生的SOA分别为7.03 ± 1.21 μg m−3和1.92 ± 1.34 μg m−3，其中芳烃贡献最大。然而，生物和人为SOA之和仅占SOA总量的18.1%~49.1%。通过正矩阵分解 (PMF) 进行的来源解析表明，二次氧化和生物质燃烧是生物 SOA 示踪剂的主要来源。人为芳烃主要来自溶剂使用、燃料和塑料燃烧以及车辆排放。然而，对于 C6 烷烃和环烷烃来说，车辆排放以及燃料和塑料燃烧是最重要的影响因素。潜在源贡献函数（PSCF）将渤海地区（BSR）确定为泰山有机气溶胶化合物和VOC物种的主要源区。
Ambient fine particulate matter (PM2.5) and volatile organic compounds (VOCs) collected at Mt. Tai in summer 2014 were analysed and the data were used to identify the contribution of biogenic and anthropogenic hydrocarbons to secondary organic aerosols (SOA) and their sources and potential source areas in high mountain regions. Compared with those in 2006, the 2014 anthropogenic SOA tracers in PM2.5aerosols and VOC species related to vehicular emissions exhibited higher concentrations, whereas the levels of biogenic SOA tracers were lower, possibly due to decreased biomass burning. Using the SOA tracer and parameterisation method, we estimated the contributions from biogenic and anthropogenic VOCs, respectively. The results showed that the average concentration of biogenic SOA was 1.08 ± 0.51 μg m−3, among which isoprene SOA tracers were dominant. The anthropogenic VOC-derived SOA were 7.03 ± 1.21 μg m−3and 1.92 ± 1.34 μg m−3under low- and high-NOxconditions, respectively, and aromatics made the greatest contribution. However, the sum of biogenic and anthropogenic SOA only contributed 18.1–49.1% of the total SOA. Source apportionment by positive matrix factorisation (PMF) revealed that secondary oxidation and biomass burning were the major sources of biogenic SOA tracers. Anthropogenic aromatics mainly came from solvent use, fuel and plastics combustion and vehicular emissions. However, for > C6 alkanes and cycloalkanes, vehicular emissions and fuel and plastics combustion were the most important contributors. The potential source contribution function (PSCF) identified the Bohai Sea Region (BSR) as the major source area for organic aerosol compounds and VOC species at Mt. Tai.