Chemistry of Atmospheric Brown Carbon

Laskin, Alexander; Laskin, Julia; Nizkorodov, Sergey A.

doi:10.1021/cr5006167

Cited by 1,347 publications

(1,807 citation statements)

References 381 publications

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“…Due to their strong absorption in the near-ultraviolet and visible regions, nitrated phenols are classified as poorly characterized brown carbon (BrC) (Desyaterik et al, 2013;Teich et al, 2017). Though the absorption of BrC is weak compared to that of black carbon (BC), it can enhance the absorption of solar radiation and may have an indirect effect on regional climate (Feng et al, 2013;Mohr et al, 2013;Laskin et al, 2015;Lu et al, 2015;Zhao et al, 2015). Recent studies have shown that several semivolatile nitrated phenols, including nitrophenol, nitrocatechol, and methyl-nitrocatechol (NC), are important photochemical oxidation products of gas-phase precursors, which may play a part in the formation of secondary organic…”

Section: Introductionmentioning

confidence: 99%

“…Wang et al: Observations of fine particulate nitrated phenols aerosols (SOAs; Pereira et al, 2015). Via photo-oxidation and aqueous-phase reactions, nitrated phenols could alter the tropospheric photochemistry and influence SOA formation, thus affecting regional air quality and atmospheric visibility (Mohr et al, 2013;Laskin et al, 2015;Chow et al, 2016;Yuan et al, 2016). In addition, nitrated phenols are hazardous to plants, animals, aquatic life, and humans (Natangelo et al, 1999;Schüssler and Nitschke, 2001;Harrison et al, 2005a;Ganranoo et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Observations of fine particulate nitrated phenols in four sites in northern China: concentrations, source apportionment, and secondary formation

Wang

et al. 2018

Atmos. Chem. Phys.

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Abstract. Filter samples of fine particulate matters were collected at four sites in northern China (urban, rural, and mountain) in summer and winter, and the contents of nine nitrated phenols were quantified in the laboratory with the use of ultra-high-performance liquid chromatography coupled with mass spectrometry. During the sampling periods, the concentrations of particulate nitrated phenols exhibited distinct temporal and spatial variation. On average, the total concentration of particulate nitrated phenols in urban Jinan in the wintertime reached 48.4 ng m −3 , and those in the summertime were 9.8, 5.7, 5.9, and 2.5 ng m −3 in urban Jinan, rural Yucheng and Wangdu, and Mt. Tai, respectively. The elevated concentrations of nitrated phenols in wintertime and in urban areas demonstrate the apparent influences of anthropogenic sources. The positive matrix factorization receptor model was then applied to determine the origins of particulate nitrated phenols in northern China. The five major source factors were traffic, coal combustion, biomass burning, secondary formation, and aged coal combustion plume. Among them, coal combustion played a vital role, especially at the urban site in the wintertime, with a contribution of around 55 %. In the summertime, the observed nitrated phenols were highly influenced by aged coal combustion plumes at all of the sampling sites. Meanwhile, in remote areas, contributions from secondary formation were significant. Further correlation analysis indicates that nitrosalicylic acids were produced mostly from secondary formation that was dominated by NO 2 nitration.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Observations of fine particulate nitrated phenols in four sites in northern China: concentrations, source apportionment, and secondary formation

Wang

et al. 2018

Atmos. Chem. Phys.

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“…Nowadays, it is firmly established that atmospheric organic aerosols (OA) are inexorably linked to both climate change and adverse health outcomes (e.g., Kanakidou et al, 2005;Heal et al, 2012;Booth et al, 2012;Laskin et al, 2015). OA have been shown to be ubiquitous in urban, rural, and remote locations, representing an important component of air particulate matter (PM) references therein;Putaud et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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

Duarte

Matos

Paula

et al. 2017

Environmental Pollution

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“…The observations of solid ASOP reported here challenge our understanding of the sources and formation mechanisms of atmospheric organic particles, and suggest an additional source from atmosphere-land surface interactions. The SOM-derived composition of ASOP implies their inherent relevance to atmospheric brown carbon and their plausible contribution to the absorption and scattering of solar and terrestrial radiation 19 . Estimates of ASOP optical properties based on reported correlations 20 with the O/C ratio and the sp 2 hybridization suggest values of single scattering albedo of 0.8-1.0 and Ångström absorption coefficients of 1.5-3.5-characteristic of brown carbon, respectively.…”

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confidence: 99%