老化对不同类型有机气溶胶毒性变化的影响

IF 6.4 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Current Pollution Reports Pub Date : 2023-06-16 DOI:10.1007/s40726-023-00272-9
Ruoyuan Lei, Ziqian Wei, Meijuan Chen, Haifeng Meng, Yun Wu, Xinlei Ge
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引用次数: 0

摘要

许多流行病学和毒理学研究表明,二次有机气溶胶(SOA)在pm2.5相关的不良健康影响中发挥了重要作用。初级有机气溶胶、挥发性有机化合物(VOCs)和中间挥发性有机化合物(IVOCs)可以与多种大气氧化剂(如氮氧化物和自由基)反应并产生SOA。SOA的化学成分随前驱体特性和老化条件的不同而变化;然而,关于它们的转化过程和机制以及相关毒性的知识仍有待探索。本文系统地综述了不同类型的有机气溶胶的化学和毒理学转化,即不同来源的新鲜气溶胶和具有代表性的不同结构的前体。大气老化通常会增强有机气溶胶的毒性。具体来说,来自生物质燃烧和交通排放的老化气溶胶比来自煤炭燃烧、烹饪和生物源的气溶胶毒性更大,这可能是由于它们的前体成分不同。在某些前驱体中,芳香化合物衍生SOA的氧化应激和毒性最高,其次是不饱和烯烃和饱和烷烃衍生SOA,这可能与它们的氧化产物不同有关。此外,我们还介绍了目前主要氧化还原反应物在老化过程中所起作用的研究进展。SOA的毒性受大气氧化还原反应物的种类和含量的复杂影响,包括3C*(有机三重态氧化态)、NOx和过渡金属离子。这项工作有望为更好地理解SOA的毒性概况和有害SOA污染的监管提供一个有希望的视角。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Aging Effects on the Toxicity Alteration of Different Types of Organic Aerosols: A Review

Numerous epidemiological and toxicological studies have demonstrated the important role of secondary organic aerosol (SOA) in PM2.5-related adverse health effects. Primary organic aerosol, volatile organic compounds (VOCs), and intermediate volatile organic compounds (IVOCs) can react with multiple atmospheric oxidants (e.g., NOx and free radicals) and generate SOA. The chemical composition of SOA varies with precursor identity and aging conditions; however, knowledge regarding their transformation process and mechanisms and associated toxicity remains to be explored. Herein, this review systematically summarizes the chemical and toxicological transformations of different types of organic aerosols, i.e., fresh aerosols from different sources and representative precursors with different structures. Atmospheric aging generally enhances the toxicity of organic aerosol. Specifically, aged aerosols from biomass combustion and traffic emissions are more toxic than those from coal combustion, cooking, and biogenic sources, which might be attributable to their different precursor compositions. For certain precursors, aromatic compound-derived SOA always has the highest oxidative stress and toxicity, followed by unsaturated alkene and saturated alkane-derived SOA, which might be related with their different oxidation products. Furthermore, we describe the current research progress on the effects of major redox reactants involved in the aging process. The toxicity of SOA is complexly affected by the species and contents of atmospheric redox reactants, including 3C*(organic triplet oxidation state), NOx, and transition metal ions. This work is expected to provide a promising perspective for a better understanding of the toxicity profile of SOA and regulation of hazardous SOA pollution.

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来源期刊
Current Pollution Reports
Current Pollution Reports Environmental Science-Water Science and Technology
CiteScore
12.10
自引率
1.40%
发文量
31
期刊介绍: Current Pollution Reports provides in-depth review articles contributed by international experts on the most significant developments in the field of environmental pollution.By presenting clear, insightful, balanced reviews that emphasize recently published papers of major importance, the journal elucidates current and emerging approaches to identification, characterization, treatment, management of pollutants and much more.
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