Spectral Studies of Humic and Fulvic Acids of Brown Coals

被引：3

作者：

Malyshenko, N. V. ^{[1
]}

Zherebtsov, S. I. ^{[1
]}

Votolin, K. S. ^{[1
]}

Zakharov, N. S. ^{[1
]}

Shpakodraev, K. M. ^{[1
]}

Ismagilov, Z. R. ^{[1
]}

机构：

[1] Russian Acad Sci, Fed Res Ctr Coal & Coal Chem, Siberian Branch, Kemerovo, Russia

来源：

CHEMISTRY FOR SUSTAINABLE DEVELOPMENT | 2022年 / 30卷 / 05期

关键词：

brown coal; humic acids; fulvic acids; IR spectroscopy; EPR spectroscopy;

D O I：

10.15372/CSD2022410

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Results of investigation into the composition of humic acids (HA) and fulvic acids (FA) isolated from brown coals by means of proximate and ultimate analysis, IR, and EPR spectroscopy are presented. It is shown that the yield of HA exceeds the yield of FA. The maximum yield (60-68 %) was detected for HA from naturally oxidized brown coal. It has been established that lignite FA and HA have significant differences in the structural and group composition: FA are characterized by the higher content of the fragments of aliphatic structures, alcohols, carboxylic acids, and esters. Humic acids are characterized by the higher content of aromatic fragments.

引用

页码：505 / 512

页数：8

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