Analysis of the Sources and Components of Aerosols in Air Pollution

A special issue of Toxics (ISSN 2305-6304).

Deadline for manuscript submissions: 31 July 2025 | Viewed by 166

Special Issue Editor

Department of Chemistry, Analytical and Testing Center, Capital Normal University, Beijing 100048, China
Interests: aerosol chemical characteristics observation; source analysis and fine particle formation mechanism; collaborative control technology of PM2.5 and O3
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Dear Colleagues,

Aerosols, which are composed of minuscule solid or liquid particles that remain suspended in the air, can travel vast distances and have far-reaching implications for our entire planet. Their presence can disrupt atmospheric stability, influence weather patterns, and even exacerbate climate change. Understanding the precise sources—be it the natural eruptions of volcanoes or the anthropogenic emissions from industrial complexes—and the complex components, such as inorganic salts and organic compounds, is not only imperative but urgent. It empowers us to more accurately predict air quality fluctuations, formulate and implement effective pollution control strategies, and comprehensively assess the potential impacts on the delicate balance of our climate, the biodiversity of ecosystems, and, most importantly, the well-being of human health.

This Special Issue delves into a series of topics related to the chemical composition of particulate matter from different atmospheric sources. It includes water-soluble ions, heavy metals, and organic compounds, with a particular emphasis on tracer substances as indicators to facilitate analysis of the sources of these particles. We also pay attention to the ecological and environmental effects of atmospheric particulate matter, including mechanisms of toxicity, metabolism, ecological impacts, risk assessment, and global climate change.

Dr. Xingru Li
Guest Editor

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Keywords

  • physical and chemical properties
  • trace organic compound analysis technology
  • source apportionment
  • chemical component evolution during the pollution process
  • cytotoxicity and metabolic mechanism

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Published Papers (1 paper)

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Review

24 pages, 3161 KiB  
Review
Pollution Characterization and Environmental Impact Evaluation of Atmospheric Intermediate Volatile Organic Compounds: A Review
by Yongxin Yan, Yan Nie, Xiaoshuai Gao, Xiaoyu Yan, Yuanyuan Ji, Junling Li and Hong Li
Toxics 2025, 13(4), 318; https://doi.org/10.3390/toxics13040318 - 19 Apr 2025
Viewed by 125
Abstract
Atmospheric intermediate volatile organic compounds (IVOCs) are important precursors of secondary organic aerosols (SOAs), and in-depth research on them is crucial for atmospheric pollution control. This review systematically synthesizes global advancements in understanding IVOC sources, emissions characterization, compositional characteristics, ambient concentrations, SOA contributions, [...] Read more.
Atmospheric intermediate volatile organic compounds (IVOCs) are important precursors of secondary organic aerosols (SOAs), and in-depth research on them is crucial for atmospheric pollution control. This review systematically synthesizes global advancements in understanding IVOC sources, emissions characterization, compositional characteristics, ambient concentrations, SOA contributions, and health risk assessments. IVOCs include long-chain alkanes (C12~C22), sesquiterpenes, polycyclic aromatic hydrocarbons, monocyclic aromatic hydrocarbons, phenolic compounds, ketones, esters, organic acids, and heterocyclic compounds, which originate from primary emissions and secondary formation. Primary emissions include direct emissions from anthropogenic and biogenic sources, while secondary formation mainly results from radical reactions or particulate surface reactions. Recently, the total IVOC emissions have decreased in some countries, while emissions from certain sources, such as volatile chemical products, have increased. Ambient IVOC concentrations are generally higher in urban rather than in rural areas, higher indoors than outdoors, and on land rather than over oceans. IVOCs primarily generate SOAs via oxidation reactions with hydroxyl radicals, nitrate radicals, the ozone, and chlorine atoms, which contribute more to SOAs than traditional VOCs, with higher SOA yields. SOA tracers for IVOC species like naphthalene and β-caryophyllene have been identified. Integrating IVOC emissions into regional air quality models could significantly improve SOA simulation accuracy. The carcinogenic risk posed by naphthalene should be prioritized, while benzo[a]pyrene requires a combined risk assessment and hierarchical management. Future research should focus on developing high-resolution online detection technologies for IVOCs, clarifying the multiphase reaction mechanisms involved and SOA tracers, and conducting comprehensive human health risk assessments. Full article
(This article belongs to the Special Issue Analysis of the Sources and Components of Aerosols in Air Pollution)
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