Properties and composition of Yakutian lignite as a source of humic substances

This article explores lignite samples from the Lena Basin. The data on the qualities and material constitution of the lignite samples are given. The Kangalass, Kirov and Kempendyai lignite samples have on the whole similar properties, compositions and ranks. The petrographic compositions of the test samples are dominated by huminite-group macerals, and the secondary components are macerals from inertinite and liptinite groups. The mineral analysis of the test lignite samples exhibits a low content of potentially hazardous elements. The studies of the content of «free» humic acids (HA) in lignites show that the Kangalass and Kirov samples feature a higher yield of HA. With a view to enhancing the yield of HA from lignite, the methods of mechanical and ultrasonic activation are considered. It is found that ultrasonic treatment allows a higher yield of HA than mechanical activation. Furthermore, the yield of HA is appreciably influenced by the time of ultrasonic treatment. For example, ultrasonic activation for one hour enabled the increased yield of HA from the Kangalass and Kirov lignite samples by 2.2 and 2.5 times, respectively, as compared with their initial content of HA.

Keywords: lignite, humic substances, humic acid yield, proximate analysis, petrography, macroand micro-elements, mechanical activation, ultrasonic treatment.
For citation:

Solovev T. M., Shaikhislam G. B., Epstein S. A., Sokolova M. D. Properties and composition of Yakutian lignite as a source of humic substances MIAB. Mining Inf. Anal. Bull. 2024;(1):67-79. [In Russ]. DOI: 10.25018/0236_1493_2024_1_0_67.

Acknowledgements:

The study was carried out within the framework of the Sustainable Development Technology Strategy Project and Priority 2030 Program of Strategic Academic Leadership.

Issue number: 1
Year: 2024
Page number: 67-79
ISBN: 0236-1493
UDK: 553.08:553.96:547.992.2(571.56)
DOI: 10.25018/0236_1493_2024_1_0_67
Article receipt date: 18.09.2023
Date of review receipt: 03.11.2023
Date of the editorial board′s decision on the article′s publishing: 10.12.2023
About authors:

T.M. Solovev1, Cand. Sci. (Eng.), Leading Engineer of Scientific Project, e-mail: tuskulsolovev@yandex.ru, ORCID ID: 0000-0002-7824-7623,
G.B. Shaikhislam1, Graduate Student, e-mail: gulshatshaikhislam@gmail.com, ORCID ID: 0009-0004-6988-1747,
S.A. Epstein1, Dr. Sci. (Eng.), Professor, Head of Laboratory, e-mail: apshtein@yandex.ru, ORCID ID: 0000-0001-8356-4319,
M.D. Sokolova, Dr. Sci. (Eng.), Chief Researcher, Director, Institute of Oil and Gas Problems, Siberian Branch of Russian Academy of Sciences, 677007, Yakutsk, Russia, e-mail: marsokol@mail.ru, ORCID ID: 0000-0003-2306-5870,
1 Research Testing Laboratory of Physics and Chemistry of Coals, National University of Science and Technology «MISiS», 119049, Moscow, Russia.

 

For contacts:

T.M. Solovev, e-mail: tuskulsolovev@yandex.ru.

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