Oxidative potential of the inhalation bioaccessible fraction of PM10 and bioaccessible concentrations of polycyclic aromatic hydrocarbons and metal(oid)s in PM10 DOI Creative Commons
Natalia Novo–Quiza, Joel Sánchez–Piñero, Jorge Moreda–Piñeiro

et al.

Environmental Science and Pollution Research, Journal Year: 2024, Volume and Issue: 31(22), P. 31862 - 31877

Published: April 19, 2024

Atmospheric particulate matter (PM) has been related to numerous adverse health effects in humans. Nowadays, it is believed that one of the possible mechanisms toxicity could be oxidative stress, which involves development reactive oxygen species (ROS). Different assays have proposed characterize such as dithiothreitol (DTT) and ascorbic acid (AA) acellular (OP

Language: Английский

Molecular insights and impacts of wildfire-induced soil chemical changes DOI Creative Commons
Alandra Lopez, Claudia Christine E. Avila, Jacob P. VanderRoest

et al.

Nature Reviews Earth & Environment, Journal Year: 2024, Volume and Issue: 5(6), P. 431 - 446

Published: May 14, 2024

Language: Английский

Citations

27
Overview of the Alaskan Layered Pollution and Chemical Analysis (ALPACA) Field Experiment DOI Creative Commons
William R. Simpson, Jingqiu Mao, Gilberto J. Fochesatto

et al.

ACS ES&T Air, Journal Year: 2024, Volume and Issue: 1(3), P. 200 - 222

Published: Feb. 21, 2024

The Alaskan Layered Pollution And Chemical Analysis (ALPACA) field experiment was a collaborative study designed to improve understanding of pollution sources and chemical processes during winter (cold climate low-photochemical activity), investigate indoor pollution, dispersion as affected by frequent temperature inversions. A number the research goals were motivated questions raised residents Fairbanks, Alaska, where held. This paper describes measurement strategies conditions encountered January February 2022 experiment, reports early examples how measurements addressed goals, particularly those interest residents. Outdoor air showed high concentrations particulate matter pollutant gases including volatile organic carbon species. During events, low winds extremely stable atmospheric trapped below 73 m, an shallow vertical scale. Tethered-balloon-based intercepted plumes aloft, which associated with power plant point through transport modeling. Because cold spend much their time indoors, included quality component, made inside outside house infiltration sources. In absence activities such cooking and/or heating pellet stove, lower than outdoors; however, stove burns often caused higher outdoors. mass-normalized oxidative potential, health-relevant property measured here reactivity dithiothreiol, particles varied source, having less potential per mass particles.

Language: Английский

Citations

17
Metal contents and size distributions of brake and tire wear particles dispersed in the near-road environment DOI

Brenda Lopez,

Xiaoliang Wang, L.‐W. Antony Chen

et al.

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 883, P. 163561 - 163561

Published: April 23, 2023

Language: Английский

Citations

27
Characterisation of environmentally persistent free radicals and their contributions to oxidative potential and reactive oxygen species in sea spray and size-resolved ambient particles DOI Creative Commons

Xinji Zhang,

Fangqin Wei,

Haiyan Fu

et al.

npj Climate and Atmospheric Science, Journal Year: 2025, Volume and Issue: 8(1)

Published: Jan. 21, 2025

Language: Английский

Citations

1
A short review on environmental distribution and toxicity of the environmentally persistent free radicals DOI

Jing-Feng Yi,

Ze-Zhao Lin,

Xing Li

et al.

Chemosphere, Journal Year: 2023, Volume and Issue: 340, P. 139922 - 139922

Published: Aug. 22, 2023

Language: Английский

Citations

21
Light Exposure of Wood Smoke Aerosol: Connecting Optical Properties, Oxidation, Radical Formation, and Chemical Composition DOI
Carolyn Liu-Kang, Anna Sokolova, Yufeng Gong

et al.

ACS ES&T Air, Journal Year: 2024, Volume and Issue: 1(4), P. 273 - 282

Published: Feb. 21, 2024

Biomass burning brown carbon (BrC) aerosol affects the climate by absorbing light in visible and UV wavelengths, with daytime photochemistry changing its optical properties. Here, aging UVB irradiation of BrC both aqueous particle states was conducted to evaluate conditions mechanism required change ability absorb an emphasis on role radicals oxidation. Photoreactions enhanced absorption O2 present phase particulate states. Deoxygenated samples did not show this enhancement, indicating importance oxidation mechanism. Using furfuryl alcohol as a singlet oxygen (1O2) scavenger, it shown that 1O2 contributes roughly one third increase phase. Conversely, hydroxyl (OH) were demonstrated have no impact. Carbon-centered radicals, measured electron paramagnetic resonance state, formed when but for deoxygenated irradiation. Overall, dependence indicates highly viscous particles, will be atmosphere at low temperatures and/or relative humidity, may experience same degree photochemical more liquid-like particles.

Language: Английский

Citations

5
Incomplete solid fuel burning as the major emission source of atmospheric phenols and environmentally persistent free radicals DOI

Anyuan Cheng,

Yang Li, Di Wu

et al.

Fuel, Journal Year: 2024, Volume and Issue: 369, P. 131735 - 131735

Published: April 21, 2024

Language: Английский

Citations

5
Applying Deep Learning for Wildfire Identification: Economical and Accessible Solutions Leveraging Small Datasets DOI Creative Commons

Anshu Shrivastava,

Manish Shrivastava

Atmosphere, Journal Year: 2025, Volume and Issue: 16(2), P. 131 - 131

Published: Jan. 26, 2025

Wildfires significantly impact human health, air quality, visibility, weather, and climate change cause substantial economic losses. While state county-operated quality monitors provide critical insights during wildfires, they are not available in all regions. This highlights the need for affordable, accessible tools that allow general public to assess impacts. In this study, we apply machine learning with deep neural networks diagnose rapidly from sky images taken at Pacific Northwest National Laboratory Richland, WA, USA. Using a convolutional network (CNN) framework, trained model classify indices based on images. By leveraging transfer learning, our approach fine-tunes pre-trained small dataset of images, reducing training time while maintaining high accuracy. Our results demonstrate potential rapid diagnostics wildfire episodes, offering early warnings enabling timely mitigation strategies, particularly vulnerable populations. Additionally, show lower respiratory infections pose highest health risk acute smoke exposures. Reactive oxygen species (ROS) particles further exacerbate risks by triggering inflammation other adverse effects.

Language: Английский

Citations

0
Toxicological screening of PM2.5 from wildfires involving different biomass fuels DOI Creative Commons
Estela D. Vicente, Daniela Figueiredo, Cátia Gonçalves

et al.

Environmental Pollution, Journal Year: 2025, Volume and Issue: unknown, P. 125887 - 125887

Published: Feb. 1, 2025

Wildfires are becoming increasingly frequent and severe, particularly in Southern Europe. In addition to their immediate environmental socioeconomic impacts, wildfires release significant amounts of particulate matter (PM), which poses serious health ecological risks. Gaseous (CO CO2) PM2.5 samples were collected directly from smoke plumes, the modified combustion efficiency (MCE) was calculated characterise conditions. This study aims assess cytotoxicity, mutagenicity ecotoxicity during Portugal, with a focus on how varying biomass types conditions impact these effects. Ecotoxicity assessments using Aliivibrio fischeri showed that ranged toxic extremely toxic, mixed vegetation burns (eucalyptus, acacia, ferns) exhibiting highest toxicity levels. Cytotoxicity tests human lung epithelial cells (A549) demonstrated dose-dependent decrease metabolic activity no membrane damage, while assays identified direct-acting mutagens smouldering acacia debris combustion, specifically inducing frameshift mutations Salmonella typhimurium strain TA98. Root growth inhibition toxicity, some samples, instead, promoting probably due nutrient content. Peroxidase responses indicated that, at higher concentrations, enzyme function could be reduced if defence mechanisms overwhelmed or stimulated high These findings highlight complex toxicological profiles wildfire PM, emphasising need for further research.

Language: Английский

Citations

0
Residential Wood Burning and Vehicle Emissions as Major Sources of Environmentally Persistent Free Radicals in Fairbanks, Alaska DOI Creative Commons
Kasey C. Edwards, Sukriti Kapur, Ting Fang

et al.

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(32), P. 14293 - 14305

Published: Aug. 2, 2024

Environmentally persistent free radicals (EPFRs) play an important role in aerosol effects on air quality and public health, but their atmospheric abundance sources are poorly understood. We measured EPFRs contained PM2.5 collected Fairbanks, Alaska, winter 2022. find that EPFR concentrations were enhanced during surface-based inversion correlate strongly with incomplete combustion markers, including carbon monoxide elemental (R2 > 0.75). exhibit moderately good correlations PAHs, biomass burning organic aerosols, potassium 0.4). also observe strong of hydrocarbon-like Fe Ti 0.6), single-particle mass spectrometry measurements reveal internal mixing iron. These results suggest residential wood vehicle tailpipes major nontailpipe emissions, such as brake wear road dust, may contribute to the stabilization EPFRs. Exposure observed (18 ± 12 pmol m–3) would be equivalent smoking ∼0.4–1 cigarette daily. Very 0.8) hydroxyl radical formation surrogate lung fluid indicate exposure induce oxidative stress human respiratory tract.

Language: Английский

Citations

3