Formation, Evolution, Toxicity, and Climate Properties of Atmospheric Aerosols

A special issue of Atmosphere (ISSN 2073-4433). This special issue belongs to the section "Aerosols".

Deadline for manuscript submissions: closed (13 September 2021) | Viewed by 2669

Special Issue Editor


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Guest Editor
William A. Lee Assistant Professor of Chemistry, Department of Chemistry & Biochemistry, University of California, San Diego, Tata Hall, 1201, La Jolla, CA 92093, USA
Interests: atmospheric chemistry; aerosol and multiphase chemistry; chemical kinetics; phase state; mass spectrometry

Special Issue Information

Dear Colleagues,

The current global pandemic is a stark reminder of the importance of airborne particulate matter (aerosols) in human health. Air pollution from aerosols is a leading cause of global mortality and affects visibility and climate via uptake of water vapor and interactions with solar and terrestrial radiation. Aerosols are produced from a variety of biogenic and anthropogenic sources, both primary (e.g., sea spray, biomass burning, wind-blown dust, and biological fragments) and secondary (i.e., gas-to-particle conversion). During transport, atmospheric aerosols can undergo chemical and physical aging processes via photochemical and multiphase reactions with trace gases. Such interactions can modulate particle chemical and physical properties, including composition, size, and phase state (viscosity), impacting the toxicity and hygroscopicity of atmospheric aerosol. A major challenge in atmospheric and aerosol risk assessment modeling is understanding the mechanisms and kinetics involved in aerosol formation and the chemical and physical evolution of aerosols.

In this Special Issue, we encourage manuscript submission of a broad range of experimental (both laboratory and field) and theoretical (fundamental chemistry and atmospheric modeling) studies related to the formation, evolution, toxicity, and climate properties of atmospheric aerosols. Studies that provide molecular and chemical kinetic insights into aerosol formation and multiphase processes that affect the toxicity and climate-relevant properties (e.g., hygroscopicity, ice nucleation efficiency, optical) of atmospheric aerosol are particularly encouraged.

Dr. Jonathan Slade
Guest Editor

Manuscript Submission Information

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Keywords

  • aerosol formation
  • atmospheric aging
  • multiphase chemistry
  • kinetics
  • toxicity
  • hygroscopicity
  • laboratory studies
  • field studies
  • theory
  • modeling

Published Papers (1 paper)

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Research

13 pages, 1455 KiB  
Article
Characterization of Products from the Aqueous-Phase Photochemical Oxidation of Benzene-Diols
by Yang Ou, Dongyang Nie, Hui Chen, Zhaolian Ye and Xinlei Ge
Atmosphere 2021, 12(5), 534; https://doi.org/10.3390/atmos12050534 - 22 Apr 2021
Cited by 4 | Viewed by 2200
Abstract
Chemical processing in atmospheric aqueous phases, including cloud and fog drops, might be significant in reconciling the gap between observed and modeled secondary organic aerosol (SOA) properties. In this work, we conducted a relatively comprehensive investigation of the reaction products generated from the [...] Read more.
Chemical processing in atmospheric aqueous phases, including cloud and fog drops, might be significant in reconciling the gap between observed and modeled secondary organic aerosol (SOA) properties. In this work, we conducted a relatively comprehensive investigation of the reaction products generated from the aqueous-phase photochemical oxidation of three benzene-diols (resorcinol, hydroquinone, and methoxyhydroquinone) by hydroxyl radical (·OH), triplet excited state (3C*) 3,4-dimethoxybenzaldehyde (3,4-DMB), and direct photolysis without any added oxidants. The results show that OH-initiated photo-degradation is the fastest of all the reaction systems. For the optical properties, the aqueous oxidation products generated under different reaction conditions all exhibited photo-enhancement upon illumination by simulated sunlight, and the light absorption was wavelength dependent on and increased as a function of the reaction time. The oxygen-to-carbon (O/C) ratio of the products also gradually increased against the irradiation time, indicating the persistent formation of highly oxygenated low-volatility products throughout the aging process. More importantly, aqueous-phase products from photochemical oxidation had an increased oxidative potential (OP) compared with its precursor, indicating they may more adversely impact health. The findings in this work highlight the importance of aqueous-phase photochemical oxidation, with implications for aqueous SOA formation and impacts on both the chemical properties and health effects of OA. Full article
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