Predicting photooxidant concentrations in aerosol liquid water based on laboratory extracts of ambient particles

L Ma, R Worland, W Jiang, C Niedek… - Atmospheric …, 2023 - acp.copernicus.org
Aerosol liquid water (ALW) is a unique reaction medium, but its chemistry is poorly
understood. For example, little is known of photooxidant concentrations–including hydroxyl …

Modeling Novel Aqueous Particle and Cloud Chemistry Processes of Biomass Burning Phenols and Their Potential to Form Secondary Organic Aerosols

J Zhang, M Shrivastava, L Ma, W Jiang… - Environmental …, 2024 - ACS Publications
Phenols emitted from biomass burning contribute significantly to secondary organic aerosol
(SOA) formation through the partitioning of semivolatile products formed from gas-phase …

Photoaging of phenolic secondary organic aerosol in the aqueous phase: evolution of chemical and optical properties and effects of oxidants

W Jiang, C Niedek, C Anastasio… - … Chemistry and Physics, 2023 - acp.copernicus.org
While gas-phase reactions are well established to have significant impacts on the mass
concentration, chemical composition, and optical properties of secondary organic aerosol …

Enhanced Light Absorption and Elevated Viscosity of Atmospheric Brown Carbon through Evaporation of Volatile Components

D Calderon-Arrieta, AC Morales… - Environmental …, 2024 - ACS Publications
Samples of brown carbon (BrC) material were collected from smoke emissions originating
from wood pyrolysis experiments, serving as a proxy for BrC representative of biomass …

Seasonal variations in photooxidant formation and light absorption in aqueous extracts of ambient particles

L Ma, R Worland, L Heinlein, C Guzman… - Atmospheric …, 2024 - acp.copernicus.org
Fog/cloud drops and aerosol liquid water are important sites for the transformations of
atmospheric species, largely through reactions with photoformed oxidants such as the …

Formation and loss of light absorbance by phenolic aqueous SOA by OH and an organic triplet excited state

S Arciva, L Ma, C Mavis, C Guzman… - … Chemistry and Physics, 2024 - acp.copernicus.org
Brown carbon (BrC) is an important component of biomass-burning (BB) emissions that
impacts Earth's radiation budget. BB directly emits primary BrC as well as gaseous phenolic …

Evaluating the potential secondary contribution of photosensitized chemistry to OH production in aqueous aerosols

EA Petersen-Sonn, M Brigante… - Environmental …, 2024 - pubs.rsc.org
This study explores the potential contribution of secondary production of OH radicals in
aerosols and cloud/fog conditions arising from brown carbon (BrC) triplet state chemistry …

Singlet oxygen is produced from brown carbon-containing cooking organic aerosols (BrCOA) under indoor lighting

N Borduas-Dedekind, KJ Gemmell… - Environmental …, 2024 - pubs.rsc.org
Light absorbing organic molecules known as brown carbon (BrC) can be emitted during
processes such as cooking and combustion in indoor environments. We hypothesized that …

Complexities of Photosensitization in Atmospheric Particles

Z Liang, Y Li, BR Go, CK Chan - ACS ES&T Air, 2024 - ACS Publications
Brown carbons (BrCs) play a pivotal role in the light absorption by aerosol particulates by
exerting a positive radiative forcing effect that contributes to global warming. Beyond impacts …

Seasonal variations in photooxidant formation and light absorption in aqueous extracts of ambient particles

L Ma, R Worland, L Heinlein, C Guzman… - …, 2023 - egusphere.copernicus.org
Atmospheric waters–including fog/cloud drops and aerosol liquid water–are important sites
for the transformations of atmospheric species, largely through reactions with photoformed …