A Collection of Molecular Fingerprints of Single Aerosol Particles in Air for Potential Identification and Detection Using Optical Trapping-Raman Spectroscopy DOI Creative Commons

Haifa Alali,

Yukai Ai,

Yong‐Le Pan

et al.

Molecules, Journal Year: 2022, Volume and Issue: 27(18), P. 5966 - 5966

Published: Sept. 14, 2022

Characterization, identification, and detection of aerosol particles in their native atmospheric states remain a challenge. Recently, optical trapping-Raman spectroscopy (OT-RS) has been developed demonstrated for characterization single, airborne particles. Such different chemical groups have characterized by OT-RS recent years many more are being studied. In this work, we collected single-particle Raman spectra measured using the technique began construction library fingerprints that may be used as reference potential identification atmosphere. We from eight categories including carbons, bioaerosols (pollens, fungi, vitamins, spores), dusts, biological warfare agent surrogates, etc. Among categories, spectral six published previously two other new. also discussed challenges, limitations, advantages aerosol-particle characterization, detection.

Language: Английский

Revealing Drivers of Haze Pollution by Explainable Machine Learning DOI

Linlu Hou,

Qili Dai, Congbo Song

et al.

Environmental Science & Technology Letters, Journal Year: 2022, Volume and Issue: 9(2), P. 112 - 119

Published: Jan. 4, 2022

Many places on earth still suffer from a high level of atmospheric fine particulate matter (PM2.5) pollution. Formation pollution event or haze episode (HE) involves many factors, including meteorology, emissions, and chemistry. Understanding the direct causes key drivers behind HE is thus essential. Traditionally, this done via chemical transport models. However, substantial uncertainties are introduced into model estimation when there significant changes in emissions inventory due to interventions (e.g., COVID-19 lockdown). Here we applied Random Forest coupled with Shapley additive explanation algorithm, post hoc technique, investigate roles major meteorological primary chemistry five severe HEs that occurred before during lockdown China. We discovered that, addition PM2.5 these episodes was largely driven by effects (with average contributions 30–65 μg m–3 for HEs), followed (∼15–30 m–3). Photochemistry likely pathway formation nitrate, while air humidity predominant factor forming sulfate. Our results highlight machine learning data has potential be complementary tool predicting interpreting

Language: Английский

Citations

171
Impacts of meteorology and precursor emission change on O3 variation in Tianjin, China from 2015 to 2021 DOI
Jing Ding, Qili Dai,

Wenyan Fan

et al.

Journal of Environmental Sciences, Journal Year: 2022, Volume and Issue: 126, P. 506 - 516

Published: March 14, 2022

Language: Английский

Citations

68
Influencing factors of PM2.5 and O3 from 2016 to 2020 based on DLNM and WRF-CMAQ DOI

Wenjiao Duan,

Xiaoqi Wang,

Shuiyuan Cheng

et al.

Environmental Pollution, Journal Year: 2021, Volume and Issue: 285, P. 117512 - 117512

Published: June 2, 2021

Language: Английский

Citations

61
Machine learning combined with the PMF model reveal the synergistic effects of sources and meteorological factors on PM2.5 pollution DOI
Zhongcheng Zhang, Bo Xu,

Weiman Xu

et al.

Environmental Research, Journal Year: 2022, Volume and Issue: 212, P. 113322 - 113322

Published: April 21, 2022

Language: Английский

Citations

58
Impact of Legislation on Brominated Flame Retardant Concentrations in UK Indoor and Outdoor Environments: Evidence for Declining Indoor Emissions of Some Legacy BFRs DOI Creative Commons
Yulong Ma, William A. Stubbings,

Jingxi Jin

et al.

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

Published: Feb. 22, 2024

Concentrations of polybrominated diphenyl ethers, hexabromocyclododecane (HBCDD), and novel brominated flame retardants (NBFRs) were measured in indoor dust, air, outdoor air Birmingham, UK. ΣBFRs ranged from 490 to 89,000 ng/g, 46–14,000 pg/m3, 22–11,000 respectively, UK air. BDE-209 decabromodiphenyl ethane (DBDPE) the main contributors. The maximum concentration DBDPE (10,000 pg/m3) is highest reported anywhere date. In contrast with previous studies we observed significant correlations between concentrations tri- hepta-BDEs HBCDD temperature. This may suggest that primary emissions ongoing use these BFRs have diminished secondary (e.g., evaporation soil) are now a potentially major source Conversely, lack temperature indicate sources remain important for BFRs. Further research clarify relative importance required. Comparison earlier Birmingham reveals (p < 0.05) declines legacy BFRs, but increases NBFRs over past decade. While there appear minimal health burdens BFR exposure adults, dust ingestion pose risk toddlers.

Language: Английский

Citations

9
The various synergistic impacts of precursor emission reduction on PM2.5 and O3 in a typical industrial city with complex distributions of emissions DOI
Min Shao,

Shun Lv,

Yajing Wei

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 940, P. 173497 - 173497

Published: May 31, 2024

Language: Английский

Citations

9
High-resolution Simulation Dataset of Hourly PM2.5 Chemical Composition in China (CAQRA-aerosol) from 2013 to 2020 DOI Creative Commons
Lei Kong, Xiao Tang, Jiang Zhu

et al.

Advances in Atmospheric Sciences, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 22, 2025

Language: Английский

Citations

1
A study on the impact of meteorological and emission factors on PM2.5 concentrations based on machine learning DOI
Guoying Zhao,

Zejian Lin,

Leifeng Yang

et al.

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 376, P. 124347 - 124347

Published: Feb. 15, 2025

Language: Английский

Citations

1
Multiple relationships between aerosol and COVID-19: A framework for global studies DOI Open Access
Yaxin Cao, Longyi Shao, Timothy Peter Jones

et al.

Gondwana Research, Journal Year: 2021, Volume and Issue: 93, P. 243 - 251

Published: Feb. 10, 2021

Language: Английский

Citations

47
Aerosol responses to precipitation along North American air trajectories arriving at Bermuda DOI Creative Commons
Hossein Dadashazar, Majid Alipanah, Miguel Ricardo A. Hilario

et al.

Atmospheric chemistry and physics, Journal Year: 2021, Volume and Issue: 21(21), P. 16121 - 16141

Published: Nov. 2, 2021

North American pollution outflow is ubiquitous over the western Atlantic Ocean, especially in winter, making this location a suitable natural laboratory for investigating impact of precipitation on aerosol particles along air mass trajectories. We take advantage observational data collected at Bermuda to seasonally assess sensitivity concentrations and volume size distributions accumulated trajectories (APT). The concentration particulate matter with aerodynamic diameter less than 2.5 μm normalized by enhancement carbon monoxide above background (PM2.5/ΔCO) was used estimate degree loss during transport Bermuda. Results December-February (DJF) show that most come from America have highest APTs, resulting significant reduction (by 53 %) PM2.5/ΔCO under high-APT conditions (> 13.5 mm) relative low-APT (< 0.9 mm). Moreover, sensitive increases APT up 5 mm (-0.044 μg m-3 ppbv-1 mm-1) mm. While anthropogenic PM2.5 constituents (e.g., black carbon, sulfate, organic carbon) decrease high APT, sea salt, contrast, comparable between high- owing enhanced local wind salt emissions conditions. greater fine-mode (versus coarse mode) wet scavenging evident AErosol RObotic NETwork (AERONET) distribution data. A combination GEOS-Chem model simulations 210Pb submicron tracer its gaseous precursor 222Rn reveals (i) surface are impacted winter spring (due large-scale precipitation) maximum March, whereas convective plays substantial role summer; (ii) contribute (~75 %-80 %), indicating masses arriving experience while traveling America. case study flight ACTIVATE field campaign 22 February 2020 number off US East Coast associated increased cloud fraction precipitation. These results highlight remote marine boundary layer characteristics trajectories, when source continental polluted regions like Coast.

Language: Английский

Citations

39