Рhysical and chemical researches on the structure of humic acids

2020;
: 22-26
1
Lviv Polytechnic National University
2
Department of PhChFF InPOCC NAS of Ukraine
3
Department of PhChFF InPOCC NAS of Ukraine
4
Lviv Polytechnic National University

Based on the complex thermal, titrimetric and UV/Vis spectral analyzes, the structure and the content of functional groups in the molecules of humic acids obtained from different raw materials – coprolite, peat and leonardite – were investigated. The thermal stability of the substances was investigated in the air in the temperature range 20-1000°C. It has been found that the content of the aliphatic component is predominant in humic acids obtained from different raw materials. A sample of humic acid obtained from coprolite has the highest content of aliphatic fragments and increased content of acid groups.

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