中文关键词春季臭氧挥发性有机物(VOCs)臭氧生成潜势(OFP)正交矩阵因子分解(PMF) 英文关键词springozonevolatile organic compounds (VOCs)ozone formation potential (OFP)positive matrix factorization (PMF)

作者	单位	E-mail
任义君	郑州大学化学学院, 环境科学研究院, 郑州 450001	ryjxiwaer@163.com
马双良	河南省环境监测中心, 郑州 450003
王思维	河南省环境监测中心, 郑州 450003
于世杰	郑州大学化学学院, 环境科学研究院, 郑州 450001
李一丹	郑州大学化学学院, 环境科学研究院, 郑州 450001
张瑞芹	郑州大学化学学院, 环境科学研究院, 郑州 450001	rqzhang@zzu.edu.cn
尹沙沙	郑州大学化学学院, 环境科学研究院, 郑州 450001

中文摘要 利用GC5000在线气相色谱仪于2018年4月15日~5月15日对郑州市城区环境大气挥发性有机物（VOCs）进行监测，开展其污染特征、臭氧生成潜势（OFP）和来源解析研究.结果表明，监测期间，郑州市春季VOCs平均体积分数为40.26×10^-9，非污染日和污染日VOCs平均体积分数分别为35.82×10^-9和44.12×10^-9，污染日相较非污染日增长23%；VOCs物种对OFP的贡献表现为烯烃 > 芳香烃 > 烷烃 > 炔烃；源解析结果显示监测期间郑州市VOCs主要来源是LPG源（66.05%）、机动车源（47.39%）、工业溶剂源（37.51%）、燃烧源（37.80%）和植物排放源（11.25%），且污染日的LPG源和植物排放源的贡献率较非污染日增长22.92%和68.50%. 英文摘要 Ambient volatile organic compounds (VOCs) were determined by GC 5000 online gas chromatography in the urban site of Zhengzhou from April 15 to May 15, 2018. Based on chemical composition analysis, in this study, the concentrations, ozone formation potential (OFP), and source apportionment were studied. The results show that the averaged volume fraction of VOCs in Zhengzhou during spring was 40.26×10^-9, which was 23% higher on polluted days (44.12×10^-9) than on non-polluted days (35.82×10^-9). The contribution of VOC species to OFP was in the order: alkenes > aromatics > alkanes > alkyne. The five factors identified by the PMF model were liquefied petroleum gas (LPG) volatilization sources (66.05%), motor vehicle exhaust sources (47.39%), industrial solvent sources (37.51%), fuel combustion sources (37.80%), and biogenic sources (11.25%). The contributions of LPG volatilization sources and biogenic sources on polluted days were higher by 22.92% and 68.50% than on non-polluted days, respectively.

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