Oskars Purmalis, Maris Klavins
Proceedings of the 14th International Peat Congress
humic-acids, peat, spectral-properties
Theme IV. Chemical, physical and biological characteristics of peat
The similarity in the structure and properties of humic substances from peat column suggests the importance of intensity of biological transformation of organic matter on their structure. Comparative and complex characterization of peat humic acids (HAs) isolated from 3 different peat profiles in Latvia was done. Elemental and functional analysis of the isolated HAs was done, their acidity, hydrophobicity and spectral characterization estimated. Comparatively, the studied peat humic acids are at the start of the transformation process of living organic matter. Results of research shows degradation of unstable compounds (polysaccharides and others) and forming more stable compounds – increasing decomposition degree of peat, increase of HAs acidity and aromaticity.