| 复合污染条件下人为源VOCs的SOA生成研究进展 |
| 摘要点击 5402 全文点击 3042 投稿时间：2022-03-24 修订日期：2022-05-30 |
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| 中文关键词 复合污染 烟雾箱 二次有机气溶胶(SOA) 挥发性有机物(VOCs) 细颗粒物(PM2.5) |
| 英文关键词 complex pollution smog chamber secondary organic aerosol (SOA) volatile organic compounds (VOCs) PM2.5 |
| 作者 | 单位 | E-mail | | 陈天增 | 中国科学院生态环境研究中心环境模拟与污染控制国家重点联合实验室, 北京 100085 | tzchen@rcees.ac.cn | | 刘俊 | 中国科学院生态环境研究中心环境模拟与污染控制国家重点联合实验室, 北京 100085
中国科学院大学资源与环境学院, 北京 100049 | | | 马庆鑫 | 中国科学院生态环境研究中心环境模拟与污染控制国家重点联合实验室, 北京 100085
中国科学院大学资源与环境学院, 北京 100049
中国科学院城市环境研究所区域大气环境研究卓越创新中心, 厦门 361021 | qxma@rcees.ac.cn | | 楚碧武 | 中国科学院生态环境研究中心环境模拟与污染控制国家重点联合实验室, 北京 100085
中国科学院大学资源与环境学院, 北京 100049
中国科学院城市环境研究所区域大气环境研究卓越创新中心, 厦门 361021 | | | 张鹏 | 中国科学院生态环境研究中心环境模拟与污染控制国家重点联合实验室, 北京 100085
中国科学院大学资源与环境学院, 北京 100049 | | | 刘永春 | 北京化工大学软物质科学与工程高精尖创新中心, 北京 100029 | | | 刘昌庚 | 攀枝花学院生物与化学工程学院, 攀枝花 617000 | | | 贺泓 | 中国科学院生态环境研究中心环境模拟与污染控制国家重点联合实验室, 北京 100085
中国科学院大学资源与环境学院, 北京 100049
中国科学院城市环境研究所区域大气环境研究卓越创新中心, 厦门 361021 | |
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| 中文摘要 |
| 大气细颗粒物（PM2.5）仍是我国空气质量持续改善的重大挑战.近年来，二次有机气溶胶（SOA）对PM2.5的贡献日益凸显.因此，深入认识复合污染条件下SOA生成机制和影响因素可以为进一步降低PM2.5提供重要理论依据.实验室模拟是深入认识SOA生成机制的关键途径，也是模式模拟参数化方案的可靠来源之一.主要综述了我国多污染物共存条件下典型人为源挥发性有机物（VOCs）的SOA生成研究进展，包括汽油蒸气VOCs、生物质燃烧VOCs和含氧VOCs形成SOA过程中，前体物浓度、芳香烃含量、无机气体、种子气溶胶和相对湿度（RH）等不同因素对SOA生成的影响；阐述了实际大气VOCs的SOA生成潜势及其影响因素，最后提出了目前在SOA机制研究方面存在的关键科学问题，并对未来的研究方向进行了展望. |
| 英文摘要 |
| Although the air quality in China has been greatly improved in recent years, the air pollution remains severe. The annual mean PM2.5 concentrations have not met the second grade of the National Ambient Air Quality Standards in China and are still much higher than the guideline value of the World Health Organization. Thus, the PM2.5 concentration needs to be further reduced. Secondary organic aerosol (SOA) is an important component of PM2.5 and has an important impact on air quality, global climate change, and human health. Therefore, understanding the formation mechanism of SOA is an important basis to control SOA and further reduce PM2.5. As an important precursor of SOA, volatile organic compounds (VOCs) can be oxidized by oxidants such as ·OH, NO3[KG-*2/3]·, Cl·, and O3 to generate low volatile organic compounds and further to form SOA through gas-particle partitioning, homogeneous nucleation, aqueous phase reaction, and heterogeneous reaction processes. The formation of SOA can be affected by many factors, such as the types and initial concentrations of VOCs, VOCs/NOx ratios, relative humidity (RH), temperature (T), seed aerosols, oxidants, aqueous phase process, and photochemical process. The observed SOA concentration is always underestimated by air quality models because a comprehensive understanding of the complexity of SOA chemical composition and formation mechanisms is still lacking, especially that under the highly complex air pollution conditions in China. Therefore, the formation mechanism and influencing factors of SOA under highly complex air pollution conditions have become an important concern in the field of atmospheric sciences. Recently, much laboratory work has focused on the formation of SOA under complex conditions. The research progress of SOA formation from different anthropogenic VOCs are reviewed here, and the methods used and the impact of different influencing factors on SOA formation are introduced. Finally, the key scientific issues that exist in the research of the SOA mechanism at present are put forward, and the future research direction is projected. |
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