Comparative Studies of Extraction Products from Brown Coals

期刊论文
发表日期：

2024年9月26日

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K. S. Votolin,
S. I. Zherebtsov,
K. M. Shpakodraev,
N. V. Malyshenko

摘要

Abstract

The samples of humic acids (HAs), hymatomelanic acids (HmAs), humus acids (HuAs), and fulvic acids (FAs) and residual coals were obtained by extraction from brown coals of the Kansk-Achinsk and South Ural coal basins. The fractions of humic substances were studied using Fourier transform IR and ¹³C NMR (CPMAS) spectroscopy, technical analysis, and elemental analysis. It has been established that all fractions of humic substances had individual elemental and structural group compositions.