Composition and sources of polycyclic aromatic hydrocarbons in cryoconites of the Tibetan Plateau glaciers

Li, Quanlian; Kang, Shichang; Wang, Ninglian; Li, Yang; Li, Xiaofei; Dong, Zhiwen; Chen, Pengfei

doi:10.1016/j.scitotenv.2016.09.159

Cited by 34 publications

(10 citation statements)

References 52 publications

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“…6). These components could be supplied by long-range atmospheric transport of terrestrial organic matter (Li and others, 2016) and local surrounding debris. It is interesting to note that the fresh snow samples have a similar composition to other samples, i.e.…”

Section: Resultsmentioning

confidence: 99%

Characteristics and sources of dissolved organic matter in a glacier in the northern Tibetan Plateau: differences between different snow categories

Feng

et al. 2018

Ann. Glaciol.

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Dissolved organic matter (DOM) in mountain glaciers is an important source of carbon for downstream aquatic systems, and its impact is expected to increase due to the increased melting rate of glaciers. We present a comprehensive study of Laohugou glacier no. 12 (LHG) at the northern edge of the Tibetan Plateau to characterize the DOM composition and sources by analyzing surface fresh snow, granular ice samples, and snow pit samples which covered a whole year cycle of 2014/15. Excitation–emission matrix fluorescence spectroscopy analysis of the DOM with parallel factor analysis (EEM-PARAFAC) identified four components, including a microbially humic-like component (C1), two protein-like components (C2 and C3) and a terrestrial humic-like component (C4). The use of Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) showed that DOM from all these samples was dominated by CHO and CHON molecular formulas, mainly corresponding to lipids and aliphatic/proteins compounds, reflecting the presence of significant amounts of microbially derived and/or deposited biogenic DOM. The molecular compositions of DOM showed more CHON compounds in granular ice than in fresh snow, likely suggesting newly formed DOM from microbes during snowmelting.

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Section: Resultsmentioning

confidence: 99%

Characteristics and sources of dissolved organic matter in a glacier in the northern Tibetan Plateau: differences between different snow categories

Feng

et al. 2018

Ann. Glaciol.

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“…The proportion (isomer pair ratios) between concentrations of natural and anthropogenic PAHs can serve as an index of the anthropogenic influences of soil and can used as tracers to identify possible sources of PAH (Pandey et al, 1999;Yunker et al, 2002;Li et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Polycyclic Aromatic Hydrocarbons and Potentially Toxic Elements in Soils of the Vicinity of the Bulgarian Antarctic Station “St. Kliment Ohridski” (Antarctic Peninsula)

Abakumov

Nizamutdinov

Yaneva

et al. 2021

Front. Environ. Sci.

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The investigation conducted was dialed to quantitative and qualitative evaluation of 15 priority polycyclic aromatic hydrocarbons (PAHs) and Potentially Toxic Elements (Cu, Pb, Zn, Cd, Ni, and Cr) is soils and cryoconites on “St. Kliment Ohridski” Antarctic station territory and its vicinities. Estimation of benzo(a)pyrene (BaP)–equivalents, PAHs and different PAHs isomer pair ratios were used for identification of general toxicity, nature and origin of individual PAHs and their groups. Total concentrations of PAHs in BaP–equivalents showed, that ∑15PAH of all selected points was higher than the threshold concentration (20 μg × kg−1–Russian environmental legislation) for benzo(a)pyrene. Different PAHs isomer ratios showed the natural (petrogenic) source of PAHs at all soils examples (except Cryosol Toxic Transportic). The maximum content among potentially toxic elements was recorded for Zn (75.7 mg × kg−1 at L26), the minimum for Cd (0.201 mg × kg−1 at L1A). Average concentrations of potentially toxic elements are generally lower compared to the results of previous studies. Application of Igeo index, characterizes the majority of the studied soils as unpolluted or practically unpolluted. Data obtained indicates that there is no current critical anthropogenic load on the environmental components of the landscapes investigated.

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“…On the surface of polar and high-mountain glaciers, ice shelves or sea ice you can frequently find dark-colored clusters of surface dust; these are called cryoconites (Mueller and Pollard, 2004;Nozomu Takeuchi and Li, 2008;Joseph Cook, Edwards, Takeuchi, and Irvine-Fynn, 2016). Cryoconites are sediments of predominantly aeolian genesis; material in cryoconites can also accumulate as a result of landslides of mineral and organic matter from valley walls, and supraglacial and englacial entrainment Wientjes et al, 2011;Shishkov et al, 2016;Li et al, 2017).…”

Section: Soil Biologymentioning

confidence: 99%

Analysis of the polydispersity of soil-like bodies in glacier environments by the laser light scattering (diffraction) method

Abakumov

Nizamutdinov

Polyakov

2021

BioComm

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This study presents the results of polydispersity analysis of soil-like bodies from two various polar regions using the laser light scattering method. The differences in the particle size distribution of cryoconite samples from the Anuchin Glacier (Antarctica) and the Mushketov Glacier (Arctic) are described. The samples obtained from the Mushketov Glacier are characterized by a finer particle size distribution than samples collected on the Anuchin Glacier. While comparing our results with previously published studies, it was found that the method of laser light scattering shows a lower content of small fractions (<0.05 mm) compared to the classical methods of sedimentation, since these methods are based on fundamentally different physical principles. The laser method used requires low amounts of samples (0.2–0.5 g), while the classical sedimentary method uses a higher gravimetric portion of cryoconite (5–10 g), which is critical for field sampling.

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Composition and sources of polycyclic aromatic hydrocarbons in cryoconites of the Tibetan Plateau glaciers

Cited by 34 publications

References 52 publications

Characteristics and sources of dissolved organic matter in a glacier in the northern Tibetan Plateau: differences between different snow categories

Characteristics and sources of dissolved organic matter in a glacier in the northern Tibetan Plateau: differences between different snow categories

Polycyclic Aromatic Hydrocarbons and Potentially Toxic Elements in Soils of the Vicinity of the Bulgarian Antarctic Station “St. Kliment Ohridski” (Antarctic Peninsula)

Analysis of the polydispersity of soil-like bodies in glacier environments by the laser light scattering (diffraction) method

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