[郑州市春季大气挥发性有机物特征、臭氧生成潜势及污染源解析]

[Ambient VOCs Characteristics, Ozone Formation Potential, and Source Apportionment of Air Pollution in Spring in Zhengzhou].

作者信息

Ren Yi-Jun, Ma Shuang-Liang, Wang Si-Wei, Yu Shi-Jie, Li Yi-Dan, Zhang Rui-Qin, Yin Sha-Sha

机构信息

Research Institute of Environmental Science, College of Chemistry, Zhengzhou University, Zhengzhou 450001, China.

Environmental Monitoring Center of Henan Province, Zhengzhou 450003, China.

出版信息

Huan Jing Ke Xue. 2020 Jun 8;41(6):2577-2585. doi: 10.13227/j.hjkx.201911081.

DOI:10.13227/j.hjkx.201911081

PMID:32608771

Abstract

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, which was 23% higher on polluted days (44.12×10) than on non-polluted days (35.82×10). 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.

摘要

2018年4月15日至5月15日，在郑州市城区采用GC 5000在线气相色谱法测定环境挥发性有机化合物（VOCs）。基于化学成分分析，本研究对其浓度、臭氧生成潜势（OFP）及来源进行了研究。结果表明，郑州市春季VOCs的平均体积分数为40.26×10，污染日（44.12×10）比非污染日（35.82×10）高23%。VOCs各物种对OFP的贡献顺序为：烯烃＞芳烃＞烷烃＞炔烃。PMF模型识别出的五个因素为液化石油气（LPG）挥发源（66.05%）、机动车尾气排放源（47.39%）、工业溶剂源（37.51%）、燃料燃烧源（37.80%）和生物源（11.25%）。污染日LPG挥发源和生物源的贡献分别比非污染日高22.92%和68.50%。