Contrasting Molecular Characteristics and Formation Mechanisms of Biogenic and Anthropogenic Secondary Organic Aerosols at the Summit and Foot of Mt. Huang, East China DOI

Yachen Wang,

Jingjing Meng,

Tonglin Huang

et al.

Published: Jan. 1, 2023

Secondary organic aerosol (SOA) exerts a considerable influence on atmospheric chemistry. However, little information about the vertical distribution of SOA in alpine setting is available, which limited simulation using chemical transport models. Here, total 15 biogenic and anthropogenic tracers were measured PM2.5 aerosols at both summit (1840 m a.s.l.) foot (480 Mt. Huang during winter 2020 to explore their formation mechanism. Most determined species (e.g., BSOA ASOA tracers, carbonaceous components, major inorganic ions) gaseous pollutants presented higher concentrations than those summit, suggesting relatively more significant effect emissions ground level. The ISORROPIA-II model showed that acidity increases as altitude decreases. Air mass trajectories, potential source contribution function (PSCF), correlation analysis with temperature revealed was mostly derived from local oxidation volatile compounds (VOCs), while mainly influenced by long-distance transport. robust correlations NH3, NO2, SO2) indicated could promote productions mountainous background atmosphere. Moreover, most correlated well levoglucosan all samples, biomass burning played an important role mountain troposphere. This work demonstrated daytime significantly valley breeze winter. Our results provide new insights into distributions provenance free troposphere over East China.

Language: Английский

Measurement report: Characteristics of nitrogen-containing organics in PM2.5 in Ürümqi, northwestern China – differential impacts of combustion of fresh and aged biomass materials DOI Creative Commons
Yi-Jia Ma, Yu Xu, Ting Yang

et al.

Atmospheric chemistry and physics, Journal Year: 2024, Volume and Issue: 24(7), P. 4331 - 4346

Published: April 15, 2024

Abstract. Nitrogen-containing organic compounds (NOCs) are abundant and important aerosol components deeply involved in the global nitrogen cycle. However, sources formation processes of NOCs remain largely unknown, particularly city (Ürümqi, China) farthest from ocean worldwide. Here, PM2.5 collected Ürümqi over a 1-year period were characterized by ultra-high-resolution mass spectrometry. The abundance CHON (mainly oxygen-poor unsaturated aliphatic-like species) positive ion mode was higher warm than cold period, which attributed to contribution fresh biomass material combustion (e.g., forest fires) associated with amidation fatty acids rather oxidation processes. nitro-aromatic negative increased significantly tightly related aged dry straws) wintertime Ürümqi. For CHN compounds, alkyl nitriles aromatic species showed periods, respectively. Alkyl can be derived dehydration amides (the main period). In contrast, burning. These findings further suggested different impacts materials on NOC compositions seasons. overall results shed light mechanisms release during combustion.

Language: Английский

Citations

7
Seasonal Variations and Health Risk Evaluation of Trace Elements in Atmospheric PM2.5 in Liaocheng, the North China Plain DOI Creative Commons
Yanhui Wang, Zhanfang Hou,

Jiangkai Ma

et al.

Atmosphere, Journal Year: 2025, Volume and Issue: 16(1), P. 72 - 72

Published: Jan. 9, 2025

Atmospheric elements can cause harmful effects on air quality and human health. Despite extensive research PM2.5, there remains a limited understanding of the seasonal variations, origins, associated health risks specific in urban areas North China Plain. PM2.5 samples across four seasons were collected to investigate provenance, 18 Liaocheng. The concentrations total detected (TDEs) exhibited distinct patterns, with biggest values occurring winter, followed by spring, autumn, summer. Fe, Ca, Al, K most plentiful throughout campaign, contributing 72.2% TDEs. enhanced crustal due frequent dust storms spring. Results from positive matrix factorization suggested that source was only identified accounting for largest percentage (37.0%), while secondary oxidation made significant contribution (34.6%) summer, facilitated higher temperatures stronger sunshine. relative abundance (41.6%) biomass burning highest ascribed intensified agricultural waste during autumn harvest, especially October. coal combustion cold substantially greater than warm seasons, highlighting role increased house heating deteriorating quality. Potential function analysis showed Liaocheng originated local neighboring regions. carcinogenic risk selected notably adult males females children, non-carcinogenic children adults. Overall, these findings provide ponderable insights into contamination characteristics sources elements, which are useful inform effective measures improving aerosol modeling.

Language: Английский

Citations

0
Characteristic Trends and Source Shifts of n-Alkanes in a Multi-Year Study: Insights from Gas-Particle Partitioning in a Central Chinese City DOI
M. Kong,

Yanyan Hao,

Ruixin Xu

et al.

Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: 488, P. 137445 - 137445

Published: Jan. 29, 2025

Language: Английский

Citations

0
Impact of temperature on the biogenic volatile organic compound (BVOC) emissions in China: A review DOI
Yiming Yang,

Fengbin Sun,

Yusheng Chen

et al.

Journal of Environmental Sciences, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Language: Английский

Citations

0
Comprehensive Assessment for the Impacts of S/IVOC Emissions from Mobile Sources on SOA Formation in China DOI
Junchao Zhao, Zhaofeng Lv, Lijuan Qi

et al.

Environmental Science & Technology, Journal Year: 2022, Volume and Issue: 56(23), P. 16695 - 16706

Published: Nov. 18, 2022

Semivolatile/intermediate-volatility organic compounds (S/IVOCs) from mobile sources are essential SOA contributors. However, few studies have comprehensively evaluated the contributions of S/IVOCs by simultaneously comparing different parameterization schemes. This study used three schemes in CMAQ model with a measurement-based emission inventory to quantify source S/IVOC-induced (MS–SI-SOA) for 2018 China. Among schemes, predicted 2D-VBS scheme was best agreement observations, but there were still large deviations regions. Three showed peak value annual average MS–SI-SOA up 0.6 ± 0.3 μg/m3. High concentrations detected autumn, while notable relative contribution total coastal areas summer, regional 20 10% Shanghai. varied 2 times among mainly due discrepancy precursor emissions and chemical reactions, suggesting that differences between should also be considered modeling studies. These findings identify hotspot periods MS–SI-SOA, highlighting importance S/IVOC control future upgrading standards.

Language: Английский

Citations

13
Characterization and sources of carbonaceous aerosols in southwest plateau of China: Effects of biomass burning and low oxygen concentration DOI
Jianwu Shi, Xiaotong Wu, Xinyu Han

et al.

Atmospheric Environment, Journal Year: 2023, Volume and Issue: 318, P. 120250 - 120250

Published: Dec. 1, 2023

Language: Английский

Citations

7
Contrasting molecular characteristics and formation mechanisms of biogenic and anthropogenic secondary organic aerosols at the summit and foot of Mt. Huang, East China DOI

Yachen Wang,

Jingjing Meng,

Tonglin Huang

et al.

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 895, P. 165116 - 165116

Published: June 25, 2023

Language: Английский

Citations

6
Impact of Ultra-Low Emission Technology of Thermal Power Plants on Air Quality in China DOI

Wenda Zhu,

Nan Li, Jiandong Li

et al.

Aerosol Science and Engineering, Journal Year: 2024, Volume and Issue: 8(4), P. 497 - 506

Published: July 4, 2024

Language: Английский

Citations

1
Spatiotemporal Characteristics of Atmospheric Brown Carbon Emission from Combustion Sources in China DOI

Shuyu Ouyang,

Ke Jiang, Rui Xiong

et al.

Chinese Geographical Science, Journal Year: 2024, Volume and Issue: 34(6), P. 993 - 1003

Published: Nov. 16, 2024

Language: Английский

Citations

1
Measurement report: Characteristics of nitrogen-containing organics in PM2.5 in Urumqi, northwest China: differential impacts of combustion of fresh and old-age biomass materials DOI Creative Commons
Yi-Jia Ma, Yu Xu, Ting Yang

et al.

Published: Jan. 4, 2024

Abstract. Nitrogen-containing organic compounds (NOCs) are abundant and important aerosol components, deeply involving in global nitrogen cycle. However, the sources formation processes of NOCs remain largely unknown, particularly city (Urumqi, China) farthest from ocean worldwide. Here, PM2.5 collected Urumqi over a one-year period were characterized by ultrahigh-resolution mass spectrometry. The abundance CHON (mainly poor-O unsaturated aliphatic-like species) positive ion mode was higher warm than cold period, which attributed to contribution fresh biomass material combustion (e.g., forest fires) associated with amidation fatty acids rather oxidation processes. nitro-aromatic negative increased significantly tightly related old-age dry straws) wintertime Urumqi. For CHN compounds, we found that alkyl nitriles aromatic CNH showed periods, respectively. It further confirmed different impacts fresh- materials on NOC compositions. Our results clarify mechanisms emitted NOCs.

Language: Английский

Citations

1