Seasonal variations and potential sources of biomass burning tracers in particulate matter in Nanjing aerosols during 2017–2018

Cao, Maoyu; Li, Wenjing; Ge, Pengxiang; Chen, Mindong; Wang, Junfeng

doi:10.1016/j.chemosphere.2022.135015

Cited by 8 publications

(3 citation statements)

References 40 publications

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“…We further performed sulfate formation experiments using syringaldehyde (SyrAld) as a model photosensitizer due to their high abundance in our IS extracts (Figure S14) and biomass-burning particles. , The experimental procedures are similar to that for IS–NaCl particles, except for replacing the IS extracts with the SyrAld solution. Compared to NaCl droplets (0.09 M), the sulfate concentration in SyrAld-NaCl droplets was significantly higher (0.23 M) after 1440 min of illumination.…”

Section: Resultsmentioning

confidence: 99%

Sulfate Formation by Photosensitization in Mixed Incense Burning–Sodium Chloride Particles: Effects of RH, Light Intensity, and Aerosol Aging

Tang

Zhang

et al. 2023

Environ. Sci. Technol.

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Elevated particulate sulfate concentrations have been frequently observed in coastal areas when air masses are influenced by continental emissions, especially combustion sources like biomass burning. We studied the SO2 uptake by laboratory-generated droplets containing incense smoke extracts and sodium chloride (IS–NaCl) under irradiation and found enhanced sulfate production over pure NaCl droplets, attributable to photosensitization induced by constituents in IS. Low relative humidity and high light intensity facilitated sulfate formation and increased the SO2 uptake coefficient by IS–NaCl particles. Aging of the IS particles further enhanced sulfate production, attributable to the enhanced secondary oxidant production promoted by increased proportions of nitrogen-containing CHN and oxygen- and nitrogen-containing CHON species under light and air. Experiments using model compounds of syringaldehyde, pyrazine, and 4-nitroguaiacol verified the enhancements of CHN and CHON species in sulfate formation. This work provides experimental evidence of enhanced sulfate production in laboratory-generated IS–NaCl droplets via enhanced secondary oxidant production triggered by photosensitization in multiphase oxidation processes under light and air. Our results can shed light on the possible interactions between sea salt and biomass burning aerosols in enhancing sulfate production.

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Section: Resultsmentioning

confidence: 99%

Sulfate Formation by Photosensitization in Mixed Incense Burning–Sodium Chloride Particles: Effects of RH, Light Intensity, and Aerosol Aging

Tang

Zhang

et al. 2023

Environ. Sci. Technol.

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“…We have 22% and 9% of the chemical formulas identical to the set (1111) for the work of Smith et al and that of Gilman et al, respectively. Levoglucosan, considered to be the most important and stable marker of biomass burning [64] is present in the study of. Smith et al However, due to its estimated time life of 8 days in the atmosphere, it could not be observed in our samples, as could be expected.…”

Section: Flux Between Sampled Neighbor Areasmentioning

confidence: 99%

The first balloon-borne sample analysis of atmospheric carbonaceous components reveals new insights into formation processes

Benoit

Vernier

et al. 2023

Chemosphere

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“…Hourly BC concentration was used to calculated its PSCF and CWT, where the average concentration of BC was used as the pollution criterion (Ren et al,. 2021;Wang et al, 2021;Cao et al, 2022;Xing et al, 2022). When the concentration corresponding to a given backward trajectory exceeds the pollution criterion, the trajectory is considered polluted.…”

Section: Frontiers In Environmental Sciencementioning

confidence: 99%

Pollution characteristics of black carbon based on MERRA-2 reanalysis data in core city of Central Plains Economic Zone, China: Historical trend and potential sources

Yan

et al. 2022

Front. Environ. Sci.

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Black carbon (BC) is one of the main factors in global climate change and human health. Based on reanalysis data from the Modern-Era Retrospective Analysis for Research and Applications Version 2 (MERRA-2), the historical trends in the variation of BC and the factors affecting this were investigated in core city of Central Plains Economic Zone in China-Zhengzhou. Based on correlation analysis with ground measurements of BC concentration, it was determined that the MERRA-2 reanalysis data could be used to reveal the variations in ground-level BC concentrations. According to the variation trends of BC concentration in 1980–2020 and typical fossil fuel consumption in 2008–2017, two periods of rapidly increasing BC concentration were identified in 1980–1989 and 1999–2006. The increase in BC concentration then slowed from 2007. Since 2012, due to the adjustment of the Zhengzhou strategy and the implementation of an emission control strategy throughout Henan Province, the consumption of coal and coke decreased by 4% every year, resulting in a downward trend in the total BC emissions. However, coal and coke were still the main factors affecting the BC concentration in Zhengzhou. The contribution of transportation to BC in Zhengzhou has been particularly important since 2016. Analysis of BC seasonal variation revealed that the highest BC concentration was in winter, mainly due to the increase in industry and residential emissions. Additionally, based on the local and regional emission inventories and combined with potential source contribution function (PSCF), concentration weighted trajectory (CWT), this study revealed the potential sources regions and source types of BC in Zhengzhou, and found that the intensification of energy consumption and BC emissions in Zhengzhou and the surrounding regions of Henan Province might be the reasons for the high BC loading in Zhengzhou through regional transport.

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Seasonal variations and potential sources of biomass burning tracers in particulate matter in Nanjing aerosols during 2017–2018

Cited by 8 publications

References 40 publications

Sulfate Formation by Photosensitization in Mixed Incense Burning–Sodium Chloride Particles: Effects of RH, Light Intensity, and Aerosol Aging

Sulfate Formation by Photosensitization in Mixed Incense Burning–Sodium Chloride Particles: Effects of RH, Light Intensity, and Aerosol Aging

The first balloon-borne sample analysis of atmospheric carbonaceous components reveals new insights into formation processes

Pollution characteristics of black carbon based on MERRA-2 reanalysis data in core city of Central Plains Economic Zone, China: Historical trend and potential sources

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