Humic Substances from Oxidized and Unoxidized Coal

被引：2

作者：

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

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

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

Pykin, A. L. ^{[1
]}

Shaymukhametova, D. D. ^{[1
]}

机构：

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

来源：

COKE AND CHEMISTRY | 2024年 / 67卷 / 01期

基金：

俄罗斯科学基金会;

关键词：

lignite; coal; weathering; oxidized coal; humic substances; fulvic acids; humic acids; petrography; coal weathering; BIOLOGICAL-ACTIVITY; SORPTION;

D O I：

10.3103/S1068364X24600052

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Oxidized and unoxidized coal samples of various ranks are compared, as well as the humic and fulvic acids derived from those materials. Petrographic analysis shows that macerals of the vitrinite group predominate in the coal samples; the oxidized samples belong to oxidation group OK II. B coal (lignite) and D coal (long-flame coal) undergo more profound changes than G coal (gas coal) on oxidation (weathering). Compared to their unoxidized counterparts, the oxidized coal samples are characterized by higher ash content, yield of volatiles, and content of oxygen, nitrogen, and sulfur. The elemental composition of fulvic and humic acids from oxidized and unoxidized B and D coal varies widely but may be regarded as typical. Compared to fulvic acid, all the samples of humic acid are higher in carbon and lower in oxygen, nitrogen, and sulfur. Given the high yield of fulvic and humic acids from oxidized B and D coal, they may be regarded as promising raw materials for humic production. The yield of fulvic and humic acids from oxidized G coal is minimal.

引用

页码：29 / 36

页数：8

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