| 北京怀柔夏季大气中的VOCs及其对O3和SOA的生成贡献 |
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| 作者姓名： | 周毕安 胡君 奇奕轩 张逦嘉 霍鹏 张元勋 张阳 王淑兰 |
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| 作者单位： | 1. 中国科学院大学资源与环境学院, 北京 101408;2. 中环天合(北京)环境科学研究院有限公司, 北京 100085;3. 内蒙古鄂尔多斯市气象局, 内蒙古 鄂尔多斯 017010;4. 中国标准化研究院资源环境研究分院, 北京 100191;5. 中国科学院大学 北京燕山地球关键带国家野外科学观测研究站, 北京 101400;6. 中国科学院大学VOCs污染控制材料与技术国家工程实验室, 北京 101400;7. 中国环境科学研究院, 北京 100012 |
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| 基金项目： | 国家重点研发计划(2016YFC0503600)和国家环境保护公益性行业科研专项(201509002)资助 |
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| 摘 要： | 为研究北京郊区挥发性有机物(VOCs)的污染特征、来源以及环境影响，于2016年夏季对北京市怀柔区大气中99种VOCs进行在线监测。结果表明，观测期间VOCs体积分数平均值为20.02×10-9，其中烷烃占比最高为38.48%，其次是含氧挥发性有机物(OVOCs)占比28.28%，卤代烃、芳香烃、烯烃和炔烃及乙腈占比较小。初始VOCs每小时的臭氧生成潜势为157.03μg·m-3，主要贡献来自于OVOCs、烯烃和芳香烃,对二次有机气溶胶生成潜势贡献最大的组分为芳香烃。源解析结果表明VOCs来自背景源和燃烧源、工业源、柴油车排放、汽油车排放、油气挥发、天然源和有机溶剂使用。后向轨迹结果表明，除北京本地源排放外，河北、河南和山东省对北京VOCs污染贡献最大，天津市、辽宁省和内蒙古自治区也有一定贡献。
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| 关 键 词： | 挥发性有机物(VOCs) 臭氧生成潜势(OFP) 二次有机气溶胶生成潜势(SOAFP) 源解析 后向轨迹 区域传输 |
| 收稿时间： | 2021-01-25 |
| 修稿时间： | 2021-03-23 |
Atmospheric VOCs and their contribution to O3 and SOA formation in summer of Huairou District,Beijing City |
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| Authors: | ZHOU Bi HU Jun QI Yixuan ZHANG Lijia HUO Peng ZHANG Yuanxun ZHANG Yang WANG Shulan |
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| Abstract: | In order to study the pollution characteristics and sources of volatile organic compounds (VOCs) and their environmental impact, 99 VOCs in Huairou District of Beijing were monitored online in summer 2016. During the observation period, the average concentration of VOCs was 20.02×10-9, among which alkanes accounted for the highest proportion of 38.48%, followed by oxygenated volatile organic compounds (OVOCs) (28.28%), halogenated hydrocarbons (12.89%), and halogenated hydrocarbons, aromatic hydrocarbons, olefins and alkynes and acetonitrile for a smaller percentage. The average hourly ozone formation potential of the initial VOCs was 157.03μg·m-3 and the major contributors were OVOCs, while alkenes and aromatics, aromatics were the major contributors to secondary organic aerosol formation potential. Seven sources were identified by the PMF model, including background and combustion sources, industrial sources, diesel vehicle emissions, gasoline vehicle emissions oil and gas volatilization, natural sources, and organic solvent use. The results from backward trajectory show that, in addition to local emissions, Hebei, Henan， and Shandong provinces have major contributions to Beijing VOCs pollution, while Tianjin City, Liaoning Province, and Inner Mongolia Autonomous Region also have some contributions. |
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| Keywords: | volatile organic compounds(VOCs) ozone formation potential(OFP) secondary organic aerosol formation potential(SOAFP) source apportionment backward trajectory regional transmission |
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