Assessment of Fe, Cr and Pb concentration changes depending on the age of peat core layers

Arctic Biomonitoring

Sypalov, S.A.^1 ; Yu Kozhevnikov, A.^1 ; Sobolev, N.A.^1 ; Ivanchenko, N.L.^1 ; Bogolicyn, K.G.^1

Northern (Arctic) Federal University Named after M.V. Lomonosov, Russia^1

关键词: Anthropogenic activity;    Anthropogenic pollution;    Chromium concentration;    Historical periods;    Iron concentrations;    Soluble organic matters;    Subarctic regions;    Transport of pollutants;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/263/1/012052/pdf
DOI  :  10.1088/1755-1315/263/1/012052

来源: IOP

【 摘 要 】

In the Arctic and subarctic regions peat soils are widespread. They serve as an indicator of anthropogenic pollution in different historical periods. Samples of peat of different ages were studied - layer of vegetation 0 cm, 0-5 cm, 5-35 cm, 85-140 cm. The age of the layers was defined on the basis of the lead-lead dating method. The elements were identified by inductively coupled plasma mass spectrometry. It was determined that the highest concentration of all three elements is observed in peats aged 2-29 years. This is due to both anthropogenic and groundwater effects. In areas that are below the maximum level of groundwater, a portion of the elements associated with readily soluble organic matter in the water is washed out and transported to the rivers with groundwater. Iron concentrations are observed in peat, regardless of anthropogenic activity, which is less characteristic of lead. This is also evidenced by large concentrations of chromium in younger layers. Lead and chromium are not nutrients. Such significant changes in lead and chromium concentrations may indicate air pollution due to the widespread development of industry and the transboundary transport of pollutants to the subarctic zone.