Abstract

The accumulation of polycyclic aromatic hydrocarbons (PAHs) in the plants of tundra peatlands on the coast of the Barents Sea (Nenets autonomous okrug) has been studied. Two- and three-ringed polyarenes are prevalent in the plants on the coast of the Barents Sea with their share in the total PAH content varying from 81 to 97%. The highest total content of polyarenes is observed in Sphagnum lindbergii Shimp., Carex aquatilis Wahlenb., and Eriophorum russeolum Fr. The plants growing in tundra and forest-tundra have identical qualitative and quantitative PAH compositions allowing for extrapolation of our data to other peatlands in the reference areas. A tight correlation between the PAH compositions of the upper peat layers and the dominant plants in the botanical composition of peat is observed. The correlation coefficients decrease with depth, which is associated with the increasing degree of peat decomposition. No accumulation peaks of heavy PAHs are observed in the active and permafrost layers of the peat in the waterlogged hollows and peat mounds of the northern tundra peatlands, which determines a decrease in the total mass fraction of polyarenes in these peatlands by an order of magnitude in comparison with the forest-tundra peatlands. Presumably, this is related to a slowed down decomposition of lignin under tundra conditions.

中文翻译：

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巴伦支海沿岸泥炭地植物中聚芳烃的积累

摘要

研究了巴伦支海沿岸的苔原泥炭地植物中的多环芳烃（PAHs）的积累（涅涅茨自治区）。二环和三环聚芳烃在巴伦支海沿岸的植物中很普遍，它们在总PAH含量中所占的比例从81％到97％不等。聚芳烃的最高总含量中观察到的泥炭藓lindbergii Shimp描述。，苔草aquatilis Wahlenb。，和羊胡子russeolum神父 在冻原和森林冻原上生长的植物具有相同的定性和定量PAH组成，可以将我们的数据外推到参考地区的其他泥炭地。观察到上部泥炭层的PAH组成与植物泥炭的植物组成中的优势植物之间紧密相关。相关系数随着深度的增加而减小，这与泥炭分解的增加程度有关。在北部苔原泥炭地的涝渍空洞和泥炭土丘的泥炭的活动层和多年冻土层中未观察到重质PAHs的积累峰，这决定了这些泥炭地中聚芳烃的总质量分数降低了一个数量级。与森林苔原泥炭地进行比较。想必，