The study of chemical nature of humic acids of peat stratigraphic column of the field hospital of Mukhrino (Khanty-Mansi autonomous region - Yugra)

The results of research of chemical nature of humic acids extracted from еру peat of stratigraphic column of 500 cm in the depth of a bog of Mukhrino located in middle taiga of Western Siberia are pre-sented in the study. The samples of peat were se-lected with an interval of 10 cm. The purpose was studying of influence of the depth of peat on chemi-cal composition of humic acids extracted from it. In the study the description of botanical structure and the extent of decomposition of studied peat sam-ples are given. The content of carbon, hydrogen, nitrogen, oxygen and sulfur in humic acids is counted for waterless and ashless substance. The limits in which mass fractions of carbon (50.30-59.30 %) change; oxygen (29.58-38.10 %); hydro-gen (4.68-6.13 %); nitrogen (2.69-5.95 %); sulfurs (0.10-1.87 %) are defined. The data of element analysis of humic acids grouped in botanical com-position of initial peat, average mass fractions were found. Humic acids extracted from sphagnum peat have the greatest content of carbon about 58 %, and specific distinctions of sphagnum peat do not bring significant distinctions. Mass fraction of car-bon in humic acids of sturgeon peat makes about 56 %, in hip-herb sapropel - 54, sapropel - 52 %. Nuclear relations of H/C, O/C of humic acids for types of peat are calculated. The chart of nuclear relations in H/C-O/C coordinates is constructed. On the basis of the chart five groups of humic acids differing on the depth of initial peat were allocated. The relations (H/C) HA for group of companies of peat column are close to value 1.70. The exception is nuclear relations (H/C) HA. The group of compa-nies of sapropels of lower horizon for which great values pointing to a bigger contribution of aliphatic component to creation of a molecule of group of HA is received. Nuclear relations of O/C of group of companies grow with peat depth.