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| 烟台市夏季大气挥发性有机物污染特征及来源研究 |
| Study on Pollution Characteristics and Sources of Atmospheric VOCs in Summer in Yantai |
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| DOI： |
| 中文关键词: 挥发性有机物 臭氧生成潜势 聚类分析 烟台 |
| 英文关键词: VOCs Ozone formation potential Cluster analysis Yantai |
| 基金项目:国家自然科学基金资助项目（42107115）；山东省自然科学基金资助项目（ZR2021QD111） |
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| 中文摘要: |
| 利用在线气相色谱-质谱仪于2021年6月—9月在烟台市开展挥发性有机物（VOCs）在线观测，运用比值法和后向轨迹聚类分析研究VOCs的污染特征及来源。结果表明，观测期间，99种VOCs总体积分数的平均值为13.64×10-9，烷烃占比最高，为3893%；其次是卤代烃和含氧挥发性有机物（OVOCs），占比分别为22.07%和20.09%。VOCs总的臭氧生成潜势（OFP）平均值为160.23μg/m3，烯烃贡献最大，其OFP为53.88μg/m3，占比33.63%。机动车尾气排放是烟台市烷烃、烯烃和芳香烃的主要来源。来自山东半岛内陆方向的气团中烷烃、烯烃和芳香烃的体积分数明显高于其他方向的气团，故须针对上述VOCs开展山东半岛区域范围的联防联控。 |
| 英文摘要: |
| In this study, the on-line observation of volatile organic compounds(VOCs) was carried out by on-line gas chromatography-mass spectrometer in Yantai from June to September 2021. The pollution characteristics and sources of VOCs were studied by ratio method and backward trajectory cluster analysis. The results showed that during the observation period, the average total volume fraction of 99 kinds VOCs was 13.64×10-9. Alkanes accounted for the highest proportion(38.93%), followed by halogenated hydrocarbons(22.07%) and OVOCs(20.09%). The average ozone formation potential(OFP) of total VOCs was 160.23μg/m3. Alkenes contributed the most, its OFP was 53.88μg/m3, accounting for 33.63%. Motor vehicle exhaust emission was the main source of alkanes, alkenes and aromatic hydrocarbons in Yantai. The volume fractions of alkanes, alkenes and aromatic hydrocarbons in the air mass from inland Shandong Peninsula was significantly higher than that from other air masses. Therefore, it was necessary to carry out joint prevention and control of VOCs in Shandong Peninsula. |
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