Significant N-containing brown carbon emission from heavy-duty diesel vehicles revealed by the molecular and chromophore analysis using ultra-high resolution mass spectrometry DOI Creative Commons
Xiao He, Xuan Zheng, Bin Jiang

et al.

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

Published: May 27, 2025

Language: Английский

Apportionment of black and brown carbon spectral absorption sources in the urban environment of Athens, Greece, during winter DOI
Dimitris G. Kaskaoutis, Georgios Grivas, Iasonas Stavroulas

et al.

The Science of The Total Environment, Journal Year: 2021, Volume and Issue: 801, P. 149739 - 149739

Published: Aug. 20, 2021

Language: Английский

Citations

73

Review of Brown Carbon Aerosols in China: Pollution Level, Optical Properties, and Emissions DOI Creative Commons
Qiaoqiao Wang, Yuyi Zhou, Nan Ma

et al.

Journal of Geophysical Research Atmospheres, Journal Year: 2022, Volume and Issue: 127(16)

Published: Aug. 9, 2022

Abstract Brown carbon (BrC) has been recognized as an important contributor to global warming due its absorption of solar radiation with strong wavelength dependence. While early studies mostly consider biomass burning a major emission source, few recent have suggested coal combustion and vehicle exhaust contributors BrC emissions. Considering dominant consumption, large residential biofuel usage, the increasing number vehicles, pollution could result in remarkable regional climate effects China. This study gives overview sources, chemical composition properties BrC, focusing on categorization measurement techniques. The basic features China, including surface concentrations, column burden, sources associated absorbing are then summarized compared other countries. emissions well optical at 365 nm from primary China also provide more straightforward understanding light‐absorbing With detailed comparison existing publications, deeper insight into uncertainties measurements will improve effect BrC. review recommends key research areas for further investigation future.

Language: Английский

Citations

61

A comprehensive evaluation of PM2.5-bound PAHs and their derivative in winter from six megacities in China: Insight the source-dependent health risk and secondary reactions DOI Creative Commons
Jian Sun, Zhenxing Shen, Tian Zhang

et al.

Environment International, Journal Year: 2022, Volume and Issue: 165, P. 107344 - 107344

Published: June 11, 2022

Atmospheric PAHs (polycyclic aromatic hydrocarbons) and their derivatives are a global concern that influences environments threatens human health. Concentrations of 52 the main in six Chinese megacities were measured winter 2019. The concentrations ∑PAHs (sum PAHs) ranged from 19.42 ± 7.68 to 65.40 29.84 ng m-3, with significantly higher levels northern cities (Harbin [HB], Beijing [BJ], Xi'an [XA]) than southern ones (Wuhan [WH], Chengdu [CD] Guangzhou [GZ]). Source apportionment was conducted by PMF model results showed coal combustion traffic emissions two dominant sources, which dominated cities, respectively. Biomass burning also characterized as crucial source extremely high contributions XA (42.5%). Assisted individual PAH results, source-depend TEQ (total BaP equivalent) incremental lifetime cancer risk (ILCR) firstly reported these cities. highlighted biomass both ILCR, underestimated apportionment. Secondary organic aerosol-derived demonstrated increase compared fresh three parameters, namely temperature, relative humidity, O3 multiple linear regression principal factors influencing secondary reactions winter. This study provides accurate health-orientated potential control measures mitigate toxicity formed PAHs, decrease uncertainty level traditional methods. revealed great progress air pollution government past 20 years, but still long way go formulate strict emission strategies environmental health-protective perspectives.

Language: Английский

Citations

56

Explorations of tire and road wear microplastics in road dust PM2.5 at eight megacities in China DOI
Jian Sun, Steven Sai Hang Ho, Xinyi Niu

et al.

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 823, P. 153717 - 153717

Published: Feb. 8, 2022

Language: Английский

Citations

43

Brown carbon absorption and radiative effects under intense residential wood burning conditions in Southeastern Europe: New insights into the abundance and absorptivity of methanol-soluble organic aerosols DOI
Despina Paraskevopoulou, Dimitris G. Kaskaoutis, Georgios Grivas

et al.

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 860, P. 160434 - 160434

Published: Nov. 24, 2022

Language: Английский

Citations

41

Insight into the Role of NH3/NH4+ and NOx/NO3 in the Formation of Nitrogen-Containing Brown Carbon in Chinese Megacities DOI

Diwei Wang,

Zhenxing Shen, Xueting Yang

et al.

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

Published: Feb. 23, 2024

Particulate brown carbon (BrC) plays a crucial role in the global radiative balance due to its ability absorb light. However, effect of molecular formation on light absorption properties BrC remains poorly understood. In this study, atmospheric samples collected from six Chinese megacities winter and summer were characterized through ultrahigh-performance liquid chromatography coupled with Orbitrap mass spectrometry (UHPLC-Orbitrap MS) measurements. The average values coefficient at wavelength 365 nm (babs365) approximately 4.0 times higher than those summer. Nitrogen-containing organic molecules (CHNO) identified as critical components light-absorbing substances both seasons, underscoring importance N-addition BrC. These nitrogen-containing chromophores more closely related nitro-containing compounds originating biomass burning nitrogen oxides (NOx)/nitrate (NO3–) reactions winter. summer, they reduced N-containing formed ammonia (NH3)/ammonium (NH4+) reactions. NH3/NH4+-mediated contributed secondary winter, particularly southern cities. Compared O/Cw, lower molecule conjugation indicator (double bond equivalent, DBE), babs365 suggest possible bleaching mechanism during oxidation process. findings strengthen connection between composition BrC, providing insights into mechanisms across northern cities different seasons.

Language: Английский

Citations

10

Light Absorption of Black and Brown Carbon in Eastern China DOI
Rongzhi Tang,

Weizhen Cui,

Xiuli Zhang

et al.

Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: 489, P. 137530 - 137530

Published: Feb. 8, 2025

Language: Английский

Citations

1

Spatial variability of carbonaceous aerosols and absorption characteristics between urban background and residential sites during wintertime at a major Mediterranean city (Athens; Greece) DOI Creative Commons
Rafaella‐Eleni P. Sotiropoulou, Dimitris G. Kaskaoutis, Panayiotis Kalkavouras

et al.

Atmospheric Research, Journal Year: 2025, Volume and Issue: unknown, P. 108163 - 108163

Published: April 1, 2025

Language: Английский

Citations

1

Optical properties of mountain primary and secondary brown carbon aerosols in summertime DOI
Yuan Gao, Qiyuan Wang, Li Li

et al.

The Science of The Total Environment, Journal Year: 2021, Volume and Issue: 806, P. 150570 - 150570

Published: Sept. 27, 2021

Language: Английский

Citations

37

Oxidative potential of atmospheric brown carbon in six Chinese megacities: Seasonal variation and source apportionment DOI

Diwei Wang,

Xueting Yang,

Hongwei Lu

et al.

Atmospheric Environment, Journal Year: 2023, Volume and Issue: 309, P. 119909 - 119909

Published: June 15, 2023

Language: Английский

Citations

15