Chemical and Isotopic Composition of Humic-Like Substances (HULIS) in Ambient Aerosols in Guangzhou, South China

Song, Jianzhong; He, Lulu; Peng, Ping’an; Zhao, Jinping; Ma, Sheng

doi:10.1080/02786826.2011.645956

Cited by 74 publications

(71 citation statements)

References 89 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3, regardless of the studied environment, all aerosol WSOC samples exhibit the same major proton types; however, they differ in terms of the relative distribution of the major proton regions. Overall, the relative content of the proton functional groups obtained in this study are within the range of those published for WSOC hydrophobic acid fractions or "humic-like substances (HULIS)" from atmospheric aerosols (e.g., Graham et al, 2002;Decesari et al, 2005;Song et al, 2012;Chalbot et al, 2014Chalbot et al, , 2016Lopes et al, 2015). For the South American sites, the saturated aliphatic protons are the most important component (36e59%), followed by unsaturated (20e33%) and oxygenated (13e40%) aliphatic protons, and a less contribution from aromatic protons (2.0e10%).…”

Section: Contribution Of Wsoc To Pm Masssupporting

confidence: 61%

Structural signatures of water-soluble organic aerosols in contrasting environments in South America and Western Europe

Duarte

Matos

Paula

et al. 2017

Environmental Pollution

View full text Add to dashboard Cite

Section: Contribution Of Wsoc To Pm Masssupporting

confidence: 61%

Structural signatures of water-soluble organic aerosols in contrasting environments in South America and Western Europe

Duarte

Matos

Paula

et al. 2017

Environmental Pollution

View full text Add to dashboard Cite

“…Each sample was collected for approximately 24 h, and a total of five filters was obtained. Detailed information regarding the sampling sites is provided in our previous studies (Fan et al, 2012;Song and Peng, 2009). These PM 2.5 samples were collected on Whatman quartz fiber filters (20.3 × 25.4 cm) using a high-volume air sampler at flow rates of 1.05 m 3 min −1 (Tianhong Intelligent Instrument Plant, Wuhan, China).…”

Section: Methodsmentioning

confidence: 99%

“…They constitute a significant portion of the organic matter (OM) in atmospheric aerosols (up to about 30 %) collected in urban and rural environments and in aerosols produced by BB (Mayol-Bracero et al, 2002;Krivacsy et al, 2008;Lin et al, 2010a, b). Their carbon (C) mass accounts for 9-72 % of the C content of water-soluble organic matter (WSOM) in atmospheric aerosols (Feczko et al, 2007;Krivacsy et al, 2008;Lin et al, 2010b;Fan et al, 2012;Song et al, 2012). These atmospheric HULIS materials are found ubiquitously in various environments, and are derived from various sources.…”

mentioning

confidence: 99%

“…HULIS are present ubiquitously in fine particles from urban, rural, marine, and biomass burning (BB) sources (Decesari et al, 2007;Salma et al, 2007;Lin et al, 2010b;Fan et al, 2012;Song et al, 2012;Zheng et al, 2013). They are believed to play important roles in several atmospheric processes, including light absorption, radiative forcing (Hoffer et al, 2006;Dinar et al, 2008), hygroscopicity, and cloud droplet formation (Dinar et al, 2007;Salma et al, 2008).…”

mentioning

confidence: 99%

See 1 more Smart Citation

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

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…The alcohol and ketone groups were slightly more abundant in the larger particles. The O/C ratios for the fine particles (<2 μm) were calculated using the peaks areas of the oxygen-containing carbon chemical states to the total C1s peak (excluding the contribution from the inorganic carbon) and are shown in Table 2 (Song and Peng 2009;Song et al 2012). The results reveal that the O/C ratio increased as the particle size increased from 0.1 to 0.56 μm, suggesting that the accumulation-mode particles were more oxidized than the smaller fresher particles.…”

Section: Carbon Chemical Statesmentioning

confidence: 99%

Surface Chemical Composition of Size-Fractionated Urban Walkway Aerosols Determined by X-Ray Photoelectron Spectroscopy

Cheng

Weng

et al. 2013

Aerosol Science and Technology

View full text Add to dashboard Cite

Most aerosol chemical characterization studies to date involve bulk particle analysis. The surface chemical and physical properties of aerosol particles have rarely been analyzed, despite the particles' potential health impacts and interactions with gas in the atmosphere. Aerosol particles ranging from 0.056 to 10 μm in size collected using a 10-stage impactor sampler from a busy walkway in a downtown area of Hong Kong were analyzed using X-ray photoelectron spectroscopy (XPS), a technique providing both elemental and chemical state information about the particle surfaces. Six key elements were detected: nitrogen (N), sulfur (S), calcium (Ca), silicon (Si), oxygen (O), and carbon (C). Carbon was the dominant species on the surfaces of all particles regardless of their sizes. A higher carbon concentration was found on the surfaces of the 0.056-0.32 μm particles. The N, Si, Ca, and O concentrations were higher on the surface of the 3.2-10 μm particles than in the smaller size fractions. Sulfur was mainly found on the surface of the 0.32-1.8 μm particles. High-resolution scans of C, N, and S were obtained to provide chemical state information about these elements. Aromatic C-H and aliphatic C-H were found to be the major carbon chemical states. Fullerenic carbon was detected on the surfaces of the finest (0.056-0.32 μm) particles. Oxygen-and nitrogen-containing organics were found on the surfaces of the 0.32-1.8 μm particles. Sulfur was present in the form of sulfates as expected. Ammonium salts, amide, and nitrate were found to form especially on the surfaces of aerosol particles in the nucleation, accumulation, and coarse modes, respectively. Silicates and carbonates were only discovered on the surfaces of coarse-mode particles (3.2-10 μm). The results suggest that both the chemical

show abstract

Chemical and Isotopic Composition of Humic-Like Substances (HULIS) in Ambient Aerosols in Guangzhou, South China

Cited by 74 publications

References 89 publications

Structural signatures of water-soluble organic aerosols in contrasting environments in South America and Western Europe

Structural signatures of water-soluble organic aerosols in contrasting environments in South America and Western Europe

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

Surface Chemical Composition of Size-Fractionated Urban Walkway Aerosols Determined by X-Ray Photoelectron Spectroscopy

Contact Info

Product

Resources

About

Chemical and Isotopic Composition of Humic-Like Substances (HULIS) in Ambient Aerosols in Guangzhou, South China

Cited by 74 publications

References 89 publications

Structural signatures of water-soluble organic aerosols in contrasting environments in South America and Western Europe

Structural signatures of water-soluble organic aerosols in contrasting environments in South America and Western Europe

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

Surface Chemical Composition of Size-Fractionated Urban Walkway Aerosols Determined by X-Ray Photoelectron Spectroscopy

Contact Info

Product

Resources

About

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