Reactive oxygen species, environmentally persistent free radicals, and oxidative potential of outdoor and indoor particulate matter in Wintertime Fairbanks, Alaska DOI Creative Commons
Sukriti Kapur, Kasey C. Edwards, Ting Fang

et al.

Aerosol Science and Technology, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 18

Published: Dec. 13, 2024

Sub-arctic cities can face episodes of high air pollution during wintertime that lead to human exposure concentrations particulate matter. During the ALPACA campaign in Fairbanks, Alaska January – February 2022, we conducted sampling outdoor fine matter (PM2.5) using a high-volume sampler and indoor PM size-segregated cascade impactor house activities including cooking residential heating pellet stove. We aimed characterize health-related properties by measuring environmentally persistent free radicals (EPFRs) reactive oxygen species (ROS) electron paramagnetic resonance (EPR) spectroscopy. also quantified oxidative potential (OP) dithiothreitol (OP-DTT) OH (OP-OH) assays. found generates •OH (67%) carbon-centered (33%), while predominantly forms (93%) water. Indoor stove burning generated substantial amounts EPFRs submicron PM. Both ROS exhibit little correlations with OP-DTT. Outdoor correlates well water-soluble iron (R2 = 0.51), indicating role Fenton(-like) reactions generating aqueous phase. OP-OH modeled production rate lung lining fluid correlate strongly EPFRs, are redox active generate •OH. observe show weak correlation measured formation water but much stronger surrogate fluid, emphasizing importance antioxidants for cycling generation

Language: Английский

Seasonal variations and intercorrelations of polycyclic aromatic hydrocarbons, heavy metals and environmentally persistent free radicals in PM2.5 in Ulaanbaatar, Mongolia DOI
Shi‐Biao Wu,

Ke Xin,

Jing Chen

et al.

Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: 489, P. 137586 - 137586

Published: Feb. 11, 2025

Language: Английский

Citations

1
Plastic Burning Particulate Matter as a Source of Environmentally Persistent Free Radicals and Reactive Oxygen and Chlorine Species DOI
Rizana Salim, Sukriti Kapur, Meredith Schervish

et al.

Published: Feb. 26, 2025

Abstract Burning plastic waste releases massive amounts of atmospheric particulate matter (PM), but its chemical composition and health-related properties are largely unelucidated. Here we characterize PM generated from burning common types plastics quantify reactive oxygen/chlorine species oxidative potential (OP). We find that contains high levels environmentally persistent free radicals (EPFRs), transition metals, polycyclic aromatic hydrocarbons. In the aqueous phase, generates hydrogen peroxide, •OH radicals, carbon-centered organic exhibiting OP as characterized by DTT OH assays. Remarkably, is associated with concentrations hypochlorous acid. Kinetic model simulations demonstrate respiratory deposition leads to formation via complex redox reactions among constituents antioxidants in lung lining fluid. Our study highlights significant health implications for unregulated burning, particularly many areas developing countries.

Language: Английский

Citations

0
Reactive oxygen species, environmentally persistent free radicals, and oxidative potential of outdoor and indoor particulate matter in Wintertime Fairbanks, Alaska DOI Creative Commons
Sukriti Kapur, Kasey C. Edwards, Ting Fang

et al.

Aerosol Science and Technology, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 18

Published: Dec. 13, 2024

Sub-arctic cities can face episodes of high air pollution during wintertime that lead to human exposure concentrations particulate matter. During the ALPACA campaign in Fairbanks, Alaska January – February 2022, we conducted sampling outdoor fine matter (PM2.5) using a high-volume sampler and indoor PM size-segregated cascade impactor house activities including cooking residential heating pellet stove. We aimed characterize health-related properties by measuring environmentally persistent free radicals (EPFRs) reactive oxygen species (ROS) electron paramagnetic resonance (EPR) spectroscopy. also quantified oxidative potential (OP) dithiothreitol (OP-DTT) OH (OP-OH) assays. found generates •OH (67%) carbon-centered (33%), while predominantly forms (93%) water. Indoor stove burning generated substantial amounts EPFRs submicron PM. Both ROS exhibit little correlations with OP-DTT. Outdoor correlates well water-soluble iron (R2 = 0.51), indicating role Fenton(-like) reactions generating aqueous phase. OP-OH modeled production rate lung lining fluid correlate strongly EPFRs, are redox active generate •OH. observe show weak correlation measured formation water but much stronger surrogate fluid, emphasizing importance antioxidants for cycling generation

Language: Английский

Citations

0