The characteristics of brown carbon aerosol during winter in Beijing

Cheng, Yuan; He, Kebin; Du, Zhenyu; Engling, Guenter; Liu, Jiumeng; Ma, Yue; Zheng, Mei; Weber, R. J.

doi:10.1016/j.atmosenv.2015.12.035

Cited by 246 publications

(234 citation statements)

References 70 publications

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“…As seen in Table 7, primary HULIS and WSOM from the same smoke PM 2.5 almost present the same AAE values. Those AAE values of HULIS were also in the range of those of primary WSOM from BB (7.4-17.8) and atmospheric WSOM from urban/rural aerosols (5.3-8.3) reported in previous studies (Chen and Bond, 2010;Hecobian et al, 2010;Cheng et al, 2011Cheng et al, , 2016Liu et al, 2013;Zhang et al, 2013;Du et al, 2014;Kirillova et al, 2014;Yan et al, 2015;Kim et al, 2016;Park and Yu, 2016). It is worth noting that the AAE of HULIS from coal combustion is observed as 13.6, which is significantly higher than the AAEs of primary HULIS or WSOM from BB in this study and in Park and Yu (2016).…”

Section: Light Absorption Propertiescontrasting

confidence: 39%

“…It is worth noting that the AAE of HULIS from coal combustion is observed as 13.6, which is significantly higher than the AAEs of primary HULIS or WSOM from BB in this study and in Park and Yu (2016). The AAE is also substantially higher than that of atmospheric WSOM from ambient aerosols here and in previous studies (Hecobian et al, 2010;Cheng et al, 2011Cheng et al, , 2016Liu et al, 2013;Zhang et al, 2013;Du et al, 2014;Kirillova et al, 2014;Yan et al, 2015;Kim et al, 2016;Park and Yu, 2016).…”

Section: Light Absorption Propertiesmentioning

confidence: 56%

“…It is obvious that the MAE 365 values of HULIS were higher than those of the corresponding WSOM, suggesting a stronger absorbing ability of HULIS. Moreover, these primary HULIS MAE 365 values seem to be comparable to ambient WSOM MAE 365 values (0.13-1.79 m 2 gC −1 ) in previous studies (Hecobian et al, 2010;Cheng et al, 2011Cheng et al, , 2016Liu et al, 2013;Zhang et al, 2013;Du et al, 2014;Kirillova et al, 2014;Yan et al, 2015;Kim et al, 2016;Park and Yu, 2016). For the four primary HULIS, it is noteworthy that MAE 365 of primary HULIS from BB was typically ∼ 1.5-3 times higher than from coal combustion.…”

Section: Light Absorption Propertiesmentioning

confidence: 72%

“…WSOM is an important fraction in organic aerosols; it has been documented to have strong light-absorbing properties (Chen and Bond, 2010;Hecobian et al, 2010;Cheng et al, 2011;Liu et al, 2013;Zhang et al, 2013;Du et al, 2014;Kirillova et al, 2014;Yan et al, 2015;Cheng et al, 2016;Kim et al, 2016;Park and Yu, 2016). The AAE and MAE 365 have been used to reflect the light-absorbing properties of water-soluble brown carbon (referred to as WSOM) in the above studies.…”

Section: Light Absorption Propertiesmentioning

confidence: 99%

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Comprehensive characterization of humic-like substances in smoke PM<sub>2.5</sub> emitted from the combustion of biomass materials and fossil fuels

et al. 2016

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Abstract. Humic-like substances (HULIS) in smoke fine particulate matter (PM 2.5 ) emitted from the combustion of biomass materials (rice straw, corn straw, and pine branch) and fossil fuels (lignite coal and diesel fuel) were comprehensively studied in this work. The HULIS fractions were first isolated with a one-step solid-phase extraction method, and were then investigated with a series of analytical techniques: elemental analysis, total organic carbon analysis, UV-vis (ultraviolet-visible) spectroscopy, excitationemission matrix (EEM) fluorescence spectroscopy, Fourier transform infrared spectroscopy, and 1 H-nuclear magnetic resonance spectroscopy. The results show that HULIS account for 11.2-23.4 and 5.3 % of PM 2.5 emitted from biomass burning (BB) and coal combustion, respectively. In addition, contributions of HULIS-C to total carbon and water-soluble carbon in smoke PM 2.5 emitted from BB are 8.0-21.7 and 56.9-66.1 %, respectively. The corresponding contributions in smoke PM 2.5 from coal combustion are 5.2 and 45.5 %, respectively. These results suggest that BB and coal combustion are both important sources of HULIS in atmospheric aerosols. However, HULIS in diesel soot only accounted for ∼ 0.8 % of the soot particles, suggesting that vehicular exhaust may not be a significant primary source of HULIS. Primary HULIS and atmospheric HULIS display many similar chemical characteristics, as indicated by the instrumental analytical characterization, while some distinct features were also apparent. A high spectral absorbance in the UV-vis spectra, a distinct band at λ ex /λ em ≈ 280/350 nm in EEM spectra, lower H / C and O / C molar ratios, and a high content of [Ar-H] were observed for primary HULIS. These results suggest that primary HULIS contain more aromatic structures, and have a lower content of aliphatic and oxygen-containing groups than atmospheric HULIS. Among the four primary sources of HULIS, HULIS from BB had the highest O / C molar ratios (0.43-0.54) and [H-C-O] content (10-19 %), indicating that HULIS from this source mainly consisted of carbohydrate-and phenolic-like structures. HULIS from coal combustion had a lower O / C molar ratio (0.27) and a higher content of [Ar-H] (31 %), suggesting that aromatic compounds were extremely abundant in HULIS from this source. Moreover, the absorption Ångström exponents of primary HULIS from BB and coal combustion were 6.7-8.2 and 13.6, respectively. The mass absorption efficiencies of primary HULIS from BB and coal combustion at 365 nm (MAE 365 ) were 0.97-2.09 and 0.63 m 2 gC −1 , respectively. Noticeably higher MAE 365 values for primary HULIS from BB than coal combustion indicate that the former has a stronger contribution to the light-absorbing properties of aerosols in the atmospheric environment.

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Section: Light Absorption Propertiescontrasting

confidence: 39%

Section: Light Absorption Propertiesmentioning

confidence: 56%

Section: Light Absorption Propertiesmentioning

confidence: 72%

Section: Light Absorption Propertiesmentioning

confidence: 99%

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Comprehensive characterization of humic-like substances in smoke PM<sub>2.5</sub> emitted from the combustion of biomass materials and fossil fuels

et al. 2016

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“…9,75 It would be worthwhile to evaluate the contributions of the identified strong chromophores to the overall UV−vis absorbance measured in the acetonitrile extracts of each of the BBOA samples (Figure 3). Figure 3a shows the overall UV−vis absorbance of the SG BBOA sample with relative contributions from the 20 most absorbing BrC chromophores labeled in Figure 2.…”

Section: Environmental Science and Technologymentioning

confidence: 99%

Molecular Characterization of Brown Carbon in Biomass Burning Aerosol Particles

Lin

Aiona

Liu

et al. 2016

Environ. Sci. Technol.

290

372

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Emissions from biomass burning are a significant source of brown carbon (BrC) in the atmosphere. In this study, we investigate the molecular composition of freshly emitted biomass burning organic aerosol (BBOA) samples collected during test burns of sawgrass, peat, ponderosa pine, and black spruce. We demonstrate that both the BrC absorption and the chemical composition of light-absorbing compounds depend significantly on the type of biomass fuels. Common BrC chromophores in the selected BBOA samples include nitro-aromatics, polycyclic aromatic hydrocarbon derivatives, and polyphenols spanning a wide range of molecular weights, structures, and light absorption properties. A number of biofuel-specific BrC chromophores are observed, indicating that some of them may be used as source-specific markers of BrC. On average, ∼50% of the light absorption in the solvent-extractable fraction of BBOA can be attributed to a limited number of strong BrC chromophores. The absorption coefficients of BBOA are affected by solar photolysis. Specifically, under typical atmospheric conditions, the 300 nm absorbance decays with a half-life of ∼16 h. A “molecular corridor” analysis of the BBOA volatility distribution suggests that many BrC compounds in the fresh BBOA have low saturation mass concentration (<1 μg m–3) and will be retained in the particle phase under atmospherically relevant conditions.

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Determining the Sources and Transport of Brown Carbon Using Radionuclide Tracers and Modeling

Jiang

Sun

et al. 2021

Preprint

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The characteristics of brown carbon aerosol during winter in Beijing

Cited by 246 publications

References 70 publications

Comprehensive characterization of humic-like substances in smoke PM<sub>2.5</sub> emitted from the combustion of biomass materials and fossil fuels

Comprehensive characterization of humic-like substances in smoke PM<sub>2.5</sub> emitted from the combustion of biomass materials and fossil fuels

Molecular Characterization of Brown Carbon in Biomass Burning Aerosol Particles

Determining the Sources and Transport of Brown Carbon Using Radionuclide Tracers and Modeling

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The characteristics of brown carbon aerosol during winter in Beijing

Cited by 246 publications

References 70 publications

Comprehensive characterization of humic-like substances in smoke PM&lt;sub&gt;2.5&lt;/sub&gt; emitted from the combustion of biomass materials and fossil fuels

Comprehensive characterization of humic-like substances in smoke PM&lt;sub&gt;2.5&lt;/sub&gt; emitted from the combustion of biomass materials and fossil fuels

Molecular Characterization of Brown Carbon in Biomass Burning Aerosol Particles

Determining the Sources and Transport of Brown Carbon Using Radionuclide Tracers and Modeling

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Resources

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Comprehensive characterization of humic-like substances in smoke PM<sub>2.5</sub> emitted from the combustion of biomass materials and fossil fuels

Comprehensive characterization of humic-like substances in smoke PM<sub>2.5</sub> emitted from the combustion of biomass materials and fossil fuels