Quantitative chemical assay of nanogram-level particulate matter using aerosol mass spectrometry: characterization of particles collected from uncrewed atmospheric measurement platforms DOI Creative Commons
Christopher Niedek, Fan Mei, Maria A. Zawadowicz

et al.

Atmospheric measurement techniques, Journal Year: 2023, Volume and Issue: 16(4), P. 955 - 968

Published: Feb. 23, 2023

Abstract. Aerosol generation techniques have expanded the utility of aerosol mass spectrometry (AMS) for offline chemical analysis airborne particles and droplets. However, standard aerosolization require relatively large liquid volumes (e.g., several milliliters) high sample masses that limit their utility. Here we report development characterization a micronebulization AMS (MN-AMS) technique requires as low 10 µL can provide quantification nanogram level organic inorganic substances via usage an isotopically labeled internal (34SO42-). Using solutions, detection limits this were determined at 0.19, 0.75, 2.2 ng sulfate, nitrate, organics, respectively. The analytical recoveries these species are 104 %, 87 94 This MN-AMS was applied successfully to analyze filter impactor samples collected using miniature particulate matter (PM) samplers deployable on uncrewed atmospheric measurement platforms, such aerial systems (UASs) tethered balloon (TBSs). Chemical composition PM from UAS field campaign conducted Department Energy's (DOE) Southern Great Plains (SGP) observatory characterized. data compared well with in situ measured by co-located speciation monitor (ACSM). In addition, ion chromatography (IC) agreed measurements sulfate nitrate concentrations extracts. study demonstrates combining platforms quantitative ambient composition.

Language: Английский

Long-term characterization of aerosol chemistry in cold season from 2013 to 2020 in Beijing, China DOI

Lu Lei,

Wei Zhou, Chun Chen

et al.

Environmental Pollution, Journal Year: 2020, Volume and Issue: 268, P. 115952 - 115952

Published: Nov. 3, 2020

Language: Английский

Citations

140
Full-volatility emission framework corrects missing and underestimated secondary organic aerosol sources DOI Creative Commons
Xing Chang, Bin Zhao, Haotian Zheng

et al.

One Earth, Journal Year: 2022, Volume and Issue: 5(4), P. 403 - 412

Published: April 1, 2022

Language: Английский

Citations

120
Real‐Time Characterization of Aerosol Compositions, Sources, and Aging Processes in Guangzhou During PRIDE‐GBA 2018 Campaign DOI
Wei Chen, Yuqing Ye, Weiwei Hu

et al.

Journal of Geophysical Research Atmospheres, Journal Year: 2021, Volume and Issue: 126(16)

Published: Aug. 6, 2021

Abstract To investigate the chemical compositions, sources, and aging processes of submicron particles (PM 1 ), a comprehensive field campaign was conducted in Guangzhou urban area China during autumn (October–November) 2018. The average mass concentration PM 35.6 ± 20.8 µg m −3 , which mainly contributed by organic aerosols (OA, 42%), then followed sulfate (25%) inorganic nitrate (11%). found to be main driving component (up ∼50%) account for fast increase polluted periods autumn. promotion effects sulfate, aerosol liquid water content, acidity on formation were systematically discussed. Source apportionment results showed 72% OA secondary (SOA), 28% primary (POA), including vehicle emission related hydrocarbon‐like (HOA, 16%), nitrogen‐containing (NOA, 3%) cooking (COA, 8%). explore OA, dynamic variations its oxidation level as function ambient photochemical age are shown. Using an situ field‐deployed flow reactor, heterogeneous reaction rate coefficients POA with OH radicals ( ) estimated 4.0–5.4 × 10 −13 cm 3 molecules −1 s is equivalent lifetime >2 weeks. long supports gas phase major pathway aging. uptake coefficient 0.76–0.84, underlining that can taken up efficiently aerosols.

Language: Английский

Citations

85
A review of secondary organic aerosols formation focusing on organosulfates and organic nitrates DOI

Wulve Fan,

Ting Chen, Zhiliang Zhu

et al.

Journal of Hazardous Materials, Journal Year: 2022, Volume and Issue: 430, P. 128406 - 128406

Published: Feb. 2, 2022

Language: Английский

Citations

51
Unexpected Increases of Severe Haze Pollution During the Post COVID‐19 Period: Effects of Emissions, Meteorology, and Secondary Production DOI
Wei Zhou,

Lu Lei,

Aodong Du

et al.

Journal of Geophysical Research Atmospheres, Journal Year: 2022, Volume and Issue: 127(3)

Published: Jan. 28, 2022

Abstract Unexpectedly frequent severe haze episodes were observed in Beijing during February–March 2021 after two phases of clean air action plan (2013–2020), yet the causes remained unclear. Here, we conducted real‐time fine particle (PM2.5) composition measurements January–March using a time‐of‐flight aerosol chemical speciation monitor and an aethalometer compared with those coronavirus disease (COVID‐19) period 2020. Our results showed ubiquitously elevated concentrations chloride, black carbon (BC), primary organic (POA) 2021, suggesting increased emissions post‐COVID‐19 period. By machine learning‐based random forest (RF) algorithm, found largely different responses changes to meteorology months. After decoupling effects meteorology, PM2.5 from 2020 reduced −35.6% −29.0% January, −24.1% −4.5% February, +92.6% +34.2% March, respectively. demonstrate dominant roles stagnant secondary production formation March 2021. In particular, that compositions deweathered fairly similar between ratios OA inorganic aerosols close. study indicates influence meteorological conditions is great importance for better evaluation mitigating strategies pollution due large impact on species particularly short

Language: Английский

Citations

50
Measurement report: Long-term changes in black carbon and aerosol optical properties from 2012 to 2020 in Beijing, China DOI Creative Commons
Jiaxing Sun, Zhe Wang, Wei Zhou

et al.

Atmospheric chemistry and physics, Journal Year: 2022, Volume and Issue: 22(1), P. 561 - 575

Published: Jan. 14, 2022

Abstract. Atmospheric aerosols play an important role in the radiation balance of earth–atmosphere system. However, our knowledge long-term changes equivalent black carbon (eBC) and aerosol optical properties China is very limited. Here we analyze 9-year measurements eBC from 2012 to 2020 Beijing, China. Our results showed large reductions by 71 % 6.25 ± 5.73 µg m−3 1.80 1.54 47 decreases light extinction coefficient (bext, λ = 630 nm) fine particles due Clean Air Action Plan that was implemented 2013. The seasonal diurnal variations illustrated most significant fall at nighttime, respectively. ΔeBC / ΔCO also annual decrease ∼ 7 4 ng ppbv−1 presented strong with high values spring fall, indicating primary emissions Beijing have changed significantly. As a response Plan, single-scattering albedo (SSA) considerable increase 0.79 0.11 0.88 0.06, mass efficiency (MEE) increased 3.2 3.8 m2 g−1. These highlight increasing importance scattering radiative forcing future challenge visibility improvement enhanced MEE. Brown (BrC) similar during 2018–2020. found secondary BrC total seasons, particularly summer contribution up 50 %, demonstrating formation recent years. affected effect. direct (ΔFR) BC decreased 67 +3.36 W m−2 +1.09 2020, +0.30 +0.17 Such might implications for affecting aerosol–boundary layer interactions air quality.

Language: Английский

Citations

47
Differentiated emissions and secondary organic aerosol formation potential of organic vapor from industrial coatings in China DOI

Chengrui Liang,

Boyang Feng,

Shuxiao Wang

et al.

Journal of Hazardous Materials, Journal Year: 2024, Volume and Issue: 466, P. 133668 - 133668

Published: Jan. 30, 2024

Language: Английский

Citations

11
Elucidating Secondary Organic Aerosol Processes through High-Resolution Aerosol Mass Spectrometry in Beijing DOI

Weiqi Xu,

Chun Chen, Zhijie Li

et al.

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

Published: Jan. 24, 2025

Language: Английский

Citations

1
Temporal variations and spatial distributions of gaseous and particulate air pollutants and their health risks during 2015–2019 in China DOI
Wei Zhou, Chun Chen,

Lu Lei

et al.

Environmental Pollution, Journal Year: 2020, Volume and Issue: 272, P. 116031 - 116031

Published: Nov. 23, 2020

Language: Английский

Citations

66
Dust-Dominated Coarse Particles as a Medium for Rapid Secondary Organic and Inorganic Aerosol Formation in Highly Polluted Air DOI
Wanyun Xu, Ye Kuang, Linlin Liang

et al.

Environmental Science & Technology, Journal Year: 2020, Volume and Issue: 54(24), P. 15710 - 15721

Published: Nov. 25, 2020

Secondary aerosol (SA) frequently drives severe haze formation on the North China Plain. However, previous studies mostly focused submicron SA formation, thus our understanding of supermicron particles remains poor. In this study, PM2.5 chemical composition and PM10 number size distribution measurements revealed that occurred in very distinct ranges. particular, dust-dominated was surprisingly high increased with relative humidity (RH). formed aerosols reached comparable levels during evolutionary stages episodes. These results suggested dust served as a medium for rapid secondary organic inorganic under favorable photochemical RH conditions highly polluted environment. Further analysis indicated pathways differed among Overall, study highlights importance non-dust storm periods urgent need to perform size-resolved physical property future investigations are extended coarse mode because large amount thereon might have significant impacts ice nucleation, radiative forcing, human health.

Language: Английский

Citations

60