State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China; Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Safety, Shanghai 200092, China.
State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China; Key Laboratory of Yangtze River Water Environment, Ministry of Education, Tongji University, Shanghai 200092, China; Shanghai Institute of Pollution Control and Ecological Safety, Shanghai 200092, China.
J Hazard Mater. 2022 May 15;430:128406. doi: 10.1016/j.jhazmat.2022.128406. Epub 2022 Feb 2.
Secondary organic aerosols (SOA) are crucial constitution of fine particulate matter (PM), which are mainly derived from photochemical oxidation products of primary organic matter and volatile organic compounds (VOCs), and can induce terrible impacts to human health, air quality and climate change. As we know, organosulfates (OSs) and organic nitrates (ON) are important contributors for SOA formation, which could be possibly produced through various pathways, resulting in extremely complex formation mechanism of SOA. Although plenty of research has been focused on the origins, spatial distribution and formation mechanisms of SOA, a comprehensive and systematic understanding of SOA formation in the atmosphere remains to be detailed explored, especially the most important OSs and ON dedications. Thus, in this review, we systematically summarize the recent research about origins and formation mechanisms of OSs and ON, and especially focus on their contribution to SOA, so as to have a clearer understanding of the origin, spatial distribution and formation principle of SOA. Importantly, we interpret the complex interaction with coexistence effect of SO and NO on SOA formation, and emphasize the future insights for SOA research to expect a more comprehensive theory and practice to alleviate SOA burden.
二次有机气溶胶 (SOA) 是细颗粒物 (PM) 的重要组成部分，主要来源于一次有机物和挥发性有机化合物 (VOCs) 的光化学氧化产物，会对人类健康、空气质量和气候变化造成严重影响。众所周知，有机硫酸盐 (OSs) 和有机硝酸盐 (ON) 是 SOA 形成的重要贡献者，它们可能通过多种途径产生，导致 SOA 形成的机制非常复杂。尽管已经有大量研究集中在 SOA 的来源、空间分布和形成机制上，但对大气中 SOA 形成的综合和系统理解仍有待深入探索，特别是对于最重要的 OSs 和 ON 的贡献。因此，在这篇综述中，我们系统地总结了 OSs 和 ON 的来源和形成机制的最新研究进展，特别是重点关注它们对 SOA 的贡献，以便更清楚地了解 SOA 的来源、空间分布和形成原理。重要的是，我们解释了 SO 和 NO 共存效应对 SOA 形成的复杂相互作用，并强调了未来对 SOA 研究的展望，以期形成更全面的理论和实践，减轻 SOA 负担。
