Research progress on secondary formation, photosensitive reaction mechanism and human health effects of chromophoric brown carbon

B Chen, J Chen, G Li, T An - Journal of Environmental Sciences, 2024 - Elsevier
Brown carbon (BrC) has attracted widespread attention because of its strong absorption of
solar radiation in the ultraviolet-visible wavelength range, which causes adverse impacts on …

Contribution of carbonyl chromophores in secondary brown carbon from nighttime oxidation of unsaturated heterocyclic volatile organic compounds

K Chen, R Mayorga, C Hamilton… - Environmental …, 2023 - ACS Publications
The light absorption properties of brown carbon (BrC), which are linked to molecular
chromophores, may play a significant role in the Earth's energy budget. While nitroaromatic …

Resolving ultraviolet–visible spectra for complex dissolved mixtures of multitudinous organic matters in aerosols

N Xu, M Hu, X Li, K Song, Y Qiu, HX Sun… - Analytical …, 2024 - ACS Publications
Light-absorbing organic aerosols, referred to as brown carbon (BrC), play a vital role in the
global climate and air quality. Due to the complexity of BrC chromophores, the identified …

Diversity of organic components in airborne waste discharged from sewer pipe repairs

AC Morales, CP West, BN Peterson, Y Noh… - … Science: Processes & …, 2023 - pubs.rsc.org
Air-discharged waste from commonly used trenchless technologies of sewer pipe repairs is
an emerging and poorly characterized source of urban pollution. This study reports on the …

[HTML][HTML] Fluorescence characteristics, absorption properties, and radiative effects of water-soluble organic carbon in seasonal snow across northeastern China

X Niu, W Pu, P Fu, Y Chen, Y Xing, D Wu… - Atmospheric …, 2022 - acp.copernicus.org
Water-soluble organic carbon (WSOC) in the cryosphere can significantly influence the
global carbon cycle and radiation budget. However, WSOC in the snowpack has received …

[HTML][HTML] Brown carbon absorptivity in fresh wildfire smoke: associations with volatility and chemical compound groups

N Shetty, P Liu, Y Liang, B Sumlin, C Daube… - Environmental …, 2023 - pubs.rsc.org
Organic aerosol (OA) emissions from wildfires across the western United States have
significant impacts on the climate and air quality. Brown carbon (BrC)—the light-absorbing …

Molecular and structural characterization of isomeric compounds in atmospheric organic aerosol using ion mobility-mass spectrometry

CP West, D Mesa Sanchez, AC Morales… - The Journal of …, 2023 - ACS Publications
Secondary organic aerosol (SOA) formed through multiphase atmospheric chemistry makes
up a large fraction of airborne particles. The chemical composition and molecular structures …

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 …

Optical Variation and Molecular Transformation of Brown Carbon During Oxidation by NO3 in the Aqueous Phase

Y Lei, X Lei, G Tian, J Yang, D Huang… - Environmental …, 2024 - ACS Publications
The NO3•-driven nighttime aging of brown carbon (BrC) is known to greatly impact its
atmospheric radiative forcing. However, the impact of oxidation by NO3• on the optical …

Insight into the Role of NH3/NH4+ and NOx/NO3 in the Formation of Nitrogen-Containing Brown Carbon in Chinese Megacities

D Wang, Z Shen, X Yang, S Huang, Y Luo… - Environmental …, 2024 - ACS Publications
Particulate brown carbon (BrC) plays a crucial role in the global radiative balance due to its
ability to absorb light. However, the effect of molecular formation on the light absorption …