Abstract: In the article thermal researches results for the humic acids (HA) in sphagnous peat which is the most suitable objects for hymification process study characterized by simple botanical composition with high sphagnous mosses residuals content are provided. The impact assessment of the initial peat botanical composition on thermodynamic stability of compound groups derived from it is given. It is shown that results of the thermogravimetric composition analysis reflect features of botanical composition of the initial peat. Correlation of composition mass lost in the low-temperature area (from 0 to 400 °C) which is followed by two exothermal effects of the macromolecule periphery expansion to weight loss in the high-temperature area (from 400 to 800 °C) having one pronounced exothermal effect of core expansion is revealed. Mean smallest value of these relations (Z) for composition of scheuchzerite peat also makes 0,59, then in the increasing sequence: compositions of sphagnous phuscum peat (0,66), complex (0,67), scheuchzerite-sphagnous (0,69) and sphagnous matted peat (0,70) follow. The less this relation is, the higher thermal stability of a macromolecule composition is. Maximum temperatures of the researched peat composition destruction in high-temperature area which mean values vary from 497,3 to 521,2 °C are set and show correlative dependence with Z index. It is defined that composition structure and properties changes under the influence of heating in the samples taken from peat of small decomposition extent are more expressed.

Cite: Sartakov M.P. , Lapshina E.D. , Osnitsky E.M. , Zarov E.A. , Deryabina Y.M.
The thermal stability comparative analysis of humic acids in the sphagnous peat of the Western Siberia Taiga Zone raised bogs
Research Journal of Pharmaceutical, Biological and Chemical Sciences. 2016. V.7. N5. P.1311-1320. WOS Scopus РИНЦ

Identifiers:

Web of science	WOS:000410728200166
Scopus	2-s2.0-84987748124
Elibrary	27576235