Abundance and size distribution of HULIS in ambient aerosols at a rural site in South China

Lin, Peng; Huang, Xin; He, Lingyan; Wang, Yuchen

doi:10.1016/j.jaerosci.2009.09.001

Cited by 171 publications

(219 citation statements)

References 68 publications

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“…As indicated in Table 1, the standard interfering compounds of variable abundances were eluted in the HULIS fraction for each method, and can therefore interfere with our target compounds. These results were also observed in many previous studies (Limbeck et al, 2005;Baduel et al, 2009;Lin et al, 2010). For the ENVI-18 and HLB methods, the interfering compounds retained and recovered exhibit very similar compositions and abundances.…”

Section: Selectivity Of the Four Methodssupporting

confidence: 87%

“…Suwannee River Fulvic Acid (SRFA) (1R101F) has been used in many studies as a representative substance for atmospheric HULIS (Kiss et al, 2005;Sullivan and Weber, 2006;Baduel et al, 2009;Lin et al, 2010), which was obtained from International Humic Substances Society (IHSS). However, some experiments were also performed with HA to compare the method for TOC isolation and procedure calibrations (Limbeck et al, 2005;Feczko et al, 2007).…”

Section: Hulis Standard and Interfering Compoundsmentioning

confidence: 99%

“…The four isolation procedures used for atmospheric HULIS including the ENVI-18, HLB, XAD-8, and DEAE methods, were based on those of previous literatures Limbeck et al, 2005;Duarte and Duarte, 2005;Duarte et al, 2007;Lin et al, 2010;Baduel et al, 2009). Briefly, the HULIS fraction was isolated and quantified from aerosol samples with the SPE column.…”

Section: Isolation Proceduresmentioning

confidence: 99%

“…HULIS are present ubiquitously in the atmospheric environments, and their carbon content makes up a mass fraction up to about 60% of the water soluble organic carbon (WSOC) in ambient aerosols (Krivácsy et al, , 2008Salma et al, 2007;Lin et al, 2010). HULIS exhibits strong surface activity that can influence the properties of the gaseliquid interface of droplets, and the multiphase or liquid phase water chemistry (Kiss et al, 2005;Dinar et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

“…Based on certain hydrophobicehydrophilic interactions between organic solutes and non-ionic adsorbing solids, the relatively highly hydrophobic macromolecular organic acids would be retained onto the adsorbents. For the SPE method, the adsorbents used usually include C-18 Samburova et al, 2007), HLB Krivácsy et al, 2008;Lin et al, 2010), XAD-8 (Duarte and Duarte, 2005;Duarte et al, 2007;Sullivan and Weber, 2006;Santos et al, 2009Santos et al, , 2010 and DEAE (Havers et al, 1998;Baduel et al, 2009). These four isolation adsorbents together cover approximately 80% of the current work about HULIS quantification and have been applied to isolation of a great variety of atmospheric samples.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of isolation and quantification methods to measure humic-like substances (HULIS) in atmospheric particles

Fan

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Section: Selectivity Of the Four Methodssupporting

confidence: 87%

Section: Hulis Standard and Interfering Compoundsmentioning

confidence: 99%

Section: Isolation Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comparison of isolation and quantification methods to measure humic-like substances (HULIS) in atmospheric particles

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Characterization of humic‐like substances in Arctic aerosols

et al. 2014

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Humic-like substances (HULIS) are a complex group of relatively high molecular weight organic compounds which contribute considerably to the mass of organic carbon (OC) and influence the light-absorbing properties of aerosols. In this work, HULIS were investigated for the first time in the high-Arctic atmosphere, focusing on the chemical characterization and mass contribution of HULIS to the total suspended particle (TSP) mass using weekly aerosol samples collected at Station Nord, northeast Greenland every fourth week during 2010. Average HULIS-C concentration was 11 ng C m À3 during the darker months (November-April) and 4 ng C m À3during the other months (May-October) with an annual mass concentration of 0.02 ± 0.01 μg m À3. HULIS-C contributed to 3-16% of water-soluble organic carbon (WSOC), whereas HULIS accounted for 0.7-4.1% of TSP mass, with TSP typically below 1.0 μg m À3. Concentrations of OC, WSOC, HULIS, selected HULIS functional groups (carboxylic acids, aromatic carboxylic acids, and organosulfates) and levoglucosan overlapped with the typical Arctic haze pattern with elevated concentrations during winter to early spring. The aromatic carboxylic acid portion accounted for a larger share of total carboxylic acid of HULIS during the darker months (7%) compared to the brighter months (3%). The more abundant aromatic carboxylic acid functional groups and the moderate correlation between HULIS and levoglucosan concentrations during the darker months both indicate that biomass burning aerosols and thereby emissions of aromatic compounds could contribute to HULIS in the Arctic, especially during late winter. During the brighter months, relatively higher average molecular weight of HULIS was observed.

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Optical extinction of highly porous aerosol following atmospheric freeze drying

et al. 2014

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Porous glassy particles are a potentially significant but unexplored component of atmospheric aerosol that can form by aerosol processing through the ice phase of high convective clouds. The optical properties of porous glassy aerosols formed from a freeze-dry cycle simulating freezing and sublimation of ice particles were measured using a cavity ring down aerosol spectrometer (CRD-AS) at 532 nm and 355 nm wavelength. The measured extinction efficiency was significantly reduced for porous organic and mixed organic-ammonium sulfate particles as compared to the extinction efficiency of the homogeneous aerosol of the same composition prior to the freeze-drying process. A number of theoretical approaches for modeling the optical extinction of porous aerosols were explored. These include effective medium approximations, extended effective medium approximations, multilayer concentric sphere models, Rayleigh-Debye-Gans theory, and the discrete dipole approximation. Though such approaches are commonly used to describe porous particles in astrophysical and atmospheric contexts, in the current study, these approaches predicted an even lower extinction than the measured one. Rather, the best representation of the measured extinction was obtained with an effective refractive index retrieved from a fit to Mie scattering theory assuming spherical particles with a fixed void content. The single-scattering albedo of the porous glassy aerosols was derived using this effective refractive index and was found to be lower than that of the corresponding homogeneous aerosol, indicating stronger relative absorption at the wavelengths measured. The reduced extinction and increased absorption may be of significance in assessing direct, indirect, and semidirect forcing in regions where porous aerosols are expected to be prevalent.

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Abundance and size distribution of HULIS in ambient aerosols at a rural site in South China

Cited by 171 publications

References 68 publications

Comparison of isolation and quantification methods to measure humic-like substances (HULIS) in atmospheric particles

Comparison of isolation and quantification methods to measure humic-like substances (HULIS) in atmospheric particles

Characterization of humic‐like substances in Arctic aerosols

Optical extinction of highly porous aerosol following atmospheric freeze drying

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