Polycyclic Aromatic Hydrocarbons and Carbon Isotopes in a Palsa Peat (Bol’shezemel’skaya Tundra

Vasil’chuk, Y.K.; Belik, A.D.; Budantseva, N.A.; Gennadiev, A.N.; Vasil’chuk, A.C.; Vasil’chuk, J.Y.; Zavgorodnyaya, Y.A.; Ginzburg, A.P.; Bludushkina, L.B.

Авторы: Vasil’chuk Yu K., Belik A.D., Budantseva N.A., Gennadiev A.N., Vasil’chuk A.C., Vasil’chuk J.Yu, Zavgorodnyaya Yu A., Ginzburg A.P., Bludushkina L.B.
Журнал: Eurasian Soil Science
Том: 54
Номер: 7
Год издания: 2021
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 999
Последняя страница: 1006
Оригинальные версии: Полициклические ароматические углеводороды и изотопы углерода в торфе миграционного бугра пучения (Большеземельская тундра)
DOI: 10.1134/S1064229321070139
Аннотация: The content of polycyclic aromatic hydrocarbons (PAHs) and carbon isotope composition in the peat of a palsa mound near Eletsky settlement, Vorkuta urban district, Komi Republic are analyzed. The carbon isotope composition of peat varies from –28.05 to –30.05‰ (average –29.15‰). The total PAH content varies from 11 to 360 ppb, with an average of 63 ppb and a median value of 34 ppb. Heavy compounds, such as benzo(a)anthracene and benzofluoranthenes, are prevalent among PAHs. The presence of PAHs in the peat is determined by three main factors: technogenic impact, wildfires, and biogeochemical soil processes. The prevalence of benzo(a)anthracene in the upper part of the palsa peat mound down to the bottom of the active seasonally thawed layer suggests an anthropogenic impact (the influence of transport and domestic fuel combustion). The share of benzo(a)anthracene decreases with depth, while the share of benzofluoranthenes increases. Two sharp peaks of PAH content (260 and 360 ppb) are observed; they coincide with a local increase in the abundance of heavier of carbon isotope values, most likely resulting from wildfires. The minimums in PAH content are presumably determined by the biogeochemical factor and the input of polyarenes generated by decomposition of plant residues. The Carbon isotope composition of peat carbon mainly reflects the isotope composition of vegetation, the degree of peat moistening, and the influence effect of pyrogenic factor.
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