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Characteristics of humic acids extracted from soil after treatment with preparation obtained from brown coal



Characteristics of humic acids extracted from soil after treatment with preparation obtained from brown coal



Polish Journal of Soil Science 34(2): 59-67



The influence of brown coal preparation called, Rekulter on the properties of humic acids in field experiments was studied. Elemental composition and parameters of thermal decomposition in the derivatograph, infrared and UV spectra were carried out for humic acids extracted from the soil three years after incorporation of Rekulter into the soil. It was found that after introduction of this preparation into the soil the content of organic carbon and value of C:N ratio were increased. Compared with non-treatment ones, humic acids extracted from soil treated with Rekulter had higher carbon and lower nitrogen content, higher absorbance values in UV-VIS region, higher content of oxygen functional groups and were more resistant to thermal decomposition.

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