Abstract

One year after an emergency spill of diesel fuel in Norilsk, hydrocarbon concentrations in bottom sediments of the Norilo-Pyasinskaya Water System decreased, but, on the average over the regions, they decreased in the surface layer in the same order as in 2020: Ambarnaya River mouth (835 µg/g, σ = 1788) > Bezymyannyi Creek—Daldykan River—Ambarnaya River (306 µg/g, σ = 273) > Pyasina River (23 µg/g, σ = 20) > Pyasino Lake (12 µg/g, σ = 8). The decrease in the concentrations was due to the degradation of low-molecular hydrocarbons. The concentration of polycyclic aromatic hydrocarbons in 2021 also varied within a narrower interval (0–1027 ng/g) than in 2020 (0–3865 ng/g). The oil origin of the hydrocarbons in the sediments of the Bezymyannyi Creek and the rivers of Daldykan and Ambarnaya is confirmed by their high content of alkylied naphthalene homologues. The accumulation of hydrocarbons in some horizons of the sedimentary stratum is due not only to the seepage of diesel fuel, but also to the input of organic matter from swampy areas and floodplain lakes, as well as to the burial of the surface layer by the flood of 2021.

中文翻译：

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诺里尔斯克柴油紧急泄漏后底部沉积物中的碳氢化合物转化

摘要

诺里尔斯克柴油紧急泄漏一年后，诺里洛-皮亚辛斯卡亚水系底部沉积物中的碳氢化合物浓度有所下降，但从各地区的平均水平来看，表层碳氢化合物浓度下降的顺序与 2020 年相同：Ambarnaya河口 (835 µg/g, σ = 1788) > Bezymyannyi Creek—Daldykan River—Ambarnaya River (306 µg/g, σ = 273) > Pyasina 河 (23 µg/g, σ = 20) > Pyasino 湖 (12 µg) /g，σ = 8）。浓度下降是由于低分子碳氢化合物的降解。2021 年多环芳烃浓度的变化区间（0-1027 ng/g）也比 2020 年（0-3865 ng/g）更窄。Bezymyannyi Creek 以及 Daldykan 河和 Ambarnaya 河沉积物中碳氢化合物的高含量烷基化萘同系物证实了它们的石油来源。沉积地层某些层位碳氢化合物的积累，不仅是由于柴油的渗漏，也是由于沼泽地区和漫滩湖泊有机质的输入以及洪水对表层的掩埋所致。 2021 年。