Ultrafine Particle Generation from Ozone Oxidation of Cannabis Smoke DOI
Kristen Yeh, Jenna C. Ditto, Laura-Hélèna Rivellini

et al.

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 18, 2024

Cannabis smoke is a complex aerosol mixture, featuring characteristic monoterpenes and sesquiterpenes which are susceptible to reaction with ozone other oxidants. These reactions form less-volatile species can contribute secondary organic (SOA) ultrafine particle (UFP) formation. In this work, the of cannabis was observed in an environmental chamber. Particle size distribution, gas-phase particle-phase composition were monitored real time. The diameter primary particles ranged from 10

Language: Английский

Molecular composition of secondary brown carbon from styrene at low-to-high oxidation degrees DOI

Shan Zhang,

Kun Li, Xiaowen Chen

et al.

Environmental Pollution, Journal Year: 2025, Volume and Issue: 368, P. 125795 - 125795

Published: Feb. 3, 2025

Language: Английский

Citations

0
Evolution of black carbon and brown carbon during summertime in Southwestern China: An assessment of control measures during the 2023 Chengdu Summer World University Games DOI

Zhier Bao,

Xiaoling Zeng,

Jiawei Zhou

et al.

Environmental Pollution, Journal Year: 2024, Volume and Issue: 357, P. 124467 - 124467

Published: June 29, 2024

Language: Английский

Citations

1
Light Absorption Properties of Brown Carbon Aerosol During Winter at a Polluted Rural Site in the North China Plain DOI Creative Commons

Yanan Tao,

Zheng Yang,

Xinyu Tan

et al.

Atmosphere, Journal Year: 2024, Volume and Issue: 15(11), P. 1294 - 1294

Published: Oct. 28, 2024

Brown carbon aerosols (BrC), a subfraction of organic aerosols, significantly influence the atmospheric environment, climate and human health. The North China Plain (NCP) is hotspot for BrC research in China, yet our understanding optical properties rural regions still very limited. In this study, we characterize chemical components light absorption at site during winter NCP. average mass concentration PM1 135.1 ± 82.3 μg/m3; organics nitrate are main PM1. coefficient (babs,BrC) 53.6 45.7 Mm−1, accounting 39.5 10.2% total 370 nm. Diurnal variations reveal that babs,BrC lower afternoon, attributed to evolution planetary boundary layers. mainly emitted locally, both aqueous phase photooxidation reactions can increase babs,BrC. Notably, reduced when RH > 65%. During foggy conditions, facilitate formation secondary contribute bleaching BrC. This process ultimately causes decrease Ångström exponent (AAE) efficiency (MAE). contrast, babs,BrC, along with AAE MAE, rise due substantial primary emissions. study enhances polluted

Language: Английский

Citations

0
Chemical Fate of Particulate Sulfur from Nighttime Oxidation of Thiophene DOI
Michael Lum, Kunpeng Chen,

B. Ries

et al.

ACS ES&T Air, Journal Year: 2024, Volume and Issue: 1(12), P. 1637 - 1649

Published: Nov. 27, 2024

Sulfur-containing volatile organic compounds emitted during wildfire events, such as dimethyl sulfide, are known to form secondary aerosols containing inorganic sulfate (SO42–) and surfactant-like compounds; however, little is about the fate of sulfur in other reduced organosulfur species. This study aimed determine sulfurous product distribution resulting from nighttime oxidation thiophene a model system. Ion chromatography (IC) aerosol mass spectrometry (a mini spectrometer, mAMS) were used constrain proportions produced under wildfire-relevant conditions ([NO2]/[O3] = 0.1). With constraints IC, results indicated that particle consisted 30.3 ± 6.6% SO42–, while mAMS fractionation attributed 24.5 1.6% total signal 15.4 1.9% organosulfates, 60.1 0.9% sulfonates. Empirical formulas products identified C1–C8 organosulfates sulfonates using complementary techniques. highlights its derivatives source SO42– particulate compounds, which have important implications for atmospheric budget aerosol/droplet physical chemical properties.

Language: Английский

Citations

0
The semi-solid phase of atmospheric particles facilitates the formation of secondary brown carbon: possible contribution of ionic strength to Maillard-like reactions DOI

Jiali Xie,

Feixue Zheng,

Yusheng Zhang

et al.

Atmospheric Environment, Journal Year: 2024, Volume and Issue: unknown, P. 120991 - 120991

Published: Dec. 1, 2024

Language: Английский

Citations

0
Ultrafine Particle Generation from Ozone Oxidation of Cannabis Smoke DOI
Kristen Yeh, Jenna C. Ditto, Laura-Hélèna Rivellini

et al.

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 18, 2024

Cannabis smoke is a complex aerosol mixture, featuring characteristic monoterpenes and sesquiterpenes which are susceptible to reaction with ozone other oxidants. These reactions form less-volatile species can contribute secondary organic (SOA) ultrafine particle (UFP) formation. In this work, the of cannabis was observed in an environmental chamber. Particle size distribution, gas-phase particle-phase composition were monitored real time. The diameter primary particles ranged from 10

Language: Английский

Citations

0