Preparation of Material Based on Biochar - MnOx, its Morphology, Thermal Stability and Phytotoxicity
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Petra Roupcová,
Karel Klouda,
Markéta Weisheitelová,
Bohdan Filipi
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| Transactions of the VSB - Technical University of Ostrava, Safety Engineering Series |
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2018, Volume 13, Issue 1, Pages 21-28
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Doi: 10.2478/tvsbses-2018-0004
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By reducing potassium permanganate using various methods (microwave radiation,
HCl, ethanol, ascorbic acid) in a biochar environment, we have prepared composites of
manganese oxides and biochar as an electrode material for elements or supercapacitors.
Once identifi ed, the prepared products were tested for thermal stability and phytotoxicity
as a safety parameter in case they get in contact with the natural environment.
The publication had also discussed progression of thermal decomposition of
the composite. The process was exo-thermal with mutual oxidation-reduction reaction
between the manganese oxides and biochar carbon. In the article there are also described
the adsorption capabilities of prepared products. The manganese oxide content had also
infl uenced the phytotoxicity test results. The biochar itself had stimulating effects on
all tested seeds, while composites had shown both stimulating and inhibiting effects,
depending on the kind of tested seeds.
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