The relation of biochar texture to its physicochemical and morphological characteristics

Biochar represents ubiquitous material produced by pyrolysis of various organic materials. Mainly the biochar originating from waste organic biomass residues represents highly attractive material with the possible utilization as a soil conditioner in agriculture. For these purposes, the knowledge of biochar chemical composition, its potential stability in soils, the knowledge of the elements and molecules, which can be released from biochar to surroundings and the relation of these properties to the actual texture of used material, seems to be highly important to predict the potential effect on soil and environment. This area represents the topic of present work, where we focused mainly on the effect of biochar texture to internal microstructure obtained by SEM and BET analysis and the content of organic matter. The results have shown, that the more developed internal structure of biochar with the larger specific surface area can be correlated with the higher content of aromatic regions formed by the organic structures with the high contents of the organic carbon. The high content of organic matter and organic carbon is assumed to be beneficial for agricultural application of biochar.