Comparative characteristics of thermal stability of humic acids of sapropels of the middle ob region and south of OB-Irtysh Basin of Wstern Siberia

N. V. Shpynova; M. P. Sartakov; I. D. Komissarov; I. V. Grekhova

N. V. Shpynova Yugra State University, 16 Chekhov st., Khanty-Mansiysk, Russia
M. P. Sartakov Yugra State University, 16 Chekhov st., Khanty-Mansiysk, Russia
I. D. Komissarov State Agricultural University of Northern Zauralie, 7 Republics st., Tyumen, Russia
I. V. Grekhova State Agricultural University of Northern Zauralie, 7 Republics st., Tyumen, Russia

Keywords: Sapropel, humic acid, thermal analysis, Middle Ob region, the Ob-Irtysh basin, Western Siberia, typology of lakes, thermal decomposition, humification, aquatic vegetation.

Abstract

The study of humic acids has more than a century history with a natural and logical evolution of focuses on their development processes, composition and properties. Despite the considerable material accumulated to date, the nature of this group of organic compounds still has not been sufficiently studied. We have decided that the distinctive features of hydrochemical and hydrobiological factors in the formation of sapropels of the studied lakes will be reflected in the thermal stability of humic acids extracted from them. Thermal analysis of humic acids extracted from the upper layers of bottom sediments of lakes of Kondinsk district of Khanty-Mansi Autonomous okrug and Barabinsk district of the Novosibirsk region, made using modern synchronous thermal analysis, has been resulted in the article. According to the obtained data, it is observed that with increasing of maximum temperature of the thermal effect, the value of Z decreases (the ratio of the mass loss in the low temperature space to the mass loss in the high temperature space), which indicates the increase in thermal stability, formation of humic acids. The indicator of humic acids of sapropels of the Kondinsk lakes varies from 0,56 to 0,67, and these intervals are much wider from 0.45 to 0.75 in the Barabinsk lakes. According to thermogravimetric analysis the only statement of changes in chemical structure is possible, and the direction of the process can be assumed taking into account the data of the structural chemistry in combination with other spectral and chemical analysis methods.

Downloads

Download data is not yet available.

Author Biographies

N. V. Shpynova, Yugra State University, 16 Chekhov st., Khanty-Mansiysk, Russia

Yugra State University, 16 Chekhov st., Khanty-Mansiysk, Russia

M. P. Sartakov, Yugra State University, 16 Chekhov st., Khanty-Mansiysk, Russia

Yugra State University, 16 Chekhov st., Khanty-Mansiysk, Russia

I. D. Komissarov, State Agricultural University of Northern Zauralie, 7 Republics st., Tyumen, Russia

State Agricultural University of Northern Zauralie, 7 Republics st., Tyumen, Russia

I. V. Grekhova, State Agricultural University of Northern Zauralie, 7 Republics st., Tyumen, Russia

State Agricultural University of Northern Zauralie, 7 Republics st., Tyumen, Russia

References

Bolotov, A. A., Chernikov, V.A., Bolatov, S.M. (2010). Derivatografic method to the study of the humus status of sod-podzolic loamy sand soil. Agrochemical Herald. 3, 38-40.

Chernikov, V. A. (1984). Structural group composition as an indicator of transformation of humic acids, of intensely used sod-podzolic loamy sand soil. Soil Science. 5, 48-55.

Chukhareva, N. V., Maslov, S. G., & Sartakov, M. P. (2015). Modification of peat humic acids. Research Journal of Pharmaceutical, Biological and Chemical Sciences, 6(6), 1516-1524.‏

Chukhareva, N. V., Sartakov, M., & Korotchenko, T. V. (2016). Alteration in elemental and functional composition of heated peat humic acids. In MATEC Web of Conferences. Chemistry and Chemical Technology in XXI Century. Les Ulis. 85, 1004. EDP Sciences.‏

Chukhareva, N. V., Shishmina, L. V., & Novikov, A. A. (2003). Kinetics of thermal degradation of humic acids. Khimiya Tverdodo Topliva. (6), 37-48.

Chukov, S. N., Ejarque, E., & Abakumov, E. V. (2017). Characterization of humic acids from tundra soils of northern Western Siberia by electron paramagnetic resonance spectroscopy. Eurasian Soil Science. 50 (1), 30-33.

Komissarov, I. D., Streltsova, I. N. (1971). Influence of the method of extraction of humic acids from raw materials of the chemical composition of the resulting preparations. Scientific. Pr. Tyumen agricultural Institute. – Tyumen. 14, 34-48.

Sartakov, M. P., Shpynova, N. V. Deryabina, Yu. M., & Komissarov, I. D. (2015). Elemental composition of humic acids of sapropels of the Middle Ob region and the south of Ob-Irtysh basin, Western Siberia. Chemistry in the interest of sustainable development. 23(5), 523-526.

Sartakov, M. P., Chukhareva, N. V., & Korotchenko, T. V. (2017). Physico-chemical properties of peat humic acids (Middle taiga of western Siberia). International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM. 421-428.

Tikhova, V. D. Sartakov, M. P. (2009). Thermal characterization of humic acids of peats of middle Ob region. Bulletin of Krasnoyarsk State Agrarian University. 11, 26-29.