Geochemical features of peat deposits of oligotrophic dog and carbon pools

The relationship of carbon distribution in the peat deposit of an oligotrophic bog in combination with the physico-chemical parameters and mineral composition of peat was considered. Analysis of the peat deposit showed high water holding capacity at 0–0.5 m and 4.0–5.0 m depths. Carbon content in organic matter of mesotrophic and fen peat types with a decomposition degree of more than 30% was 59.5% (3.0–3.5 m) and 57.8% (5.0–5.5 m) respectively. The amount of humic acids was 18.1% in the mesotrophic part of the deposit (1.5–2.0 m) and decreased 2–4 times with increasing peat depth. High sorption exchange capacity of humic acids was revealed at the depth from 1.5 to 3.5 m. Scanning electron microscope micrographs were obtained, and the distribution of micro- and macroelements in peat was analyzed. The formation of organomineral layer at depths of 1.0–3.5 and 5.0–6.5 m was shown. The relationship between the amount of functional groups of humic acids and the distribution of Al, Si and Fe in peat by the depth of the peat deposit was obtained.