Abstract
Oxidation of charcoal with nitric acid or with SeO2/H2O2 produced biochar, the material similar to the Indian black earth of the Amazon region. The Electron paramagnetic resonance (EPR) spectroscopy data indicate that the organic-free radical density of the prepared biochar is greater under the treatment of charcoal with SeO2/H2O2 than with nitric acid. The FTIR and EPR spectroscopy data of the prepared biochar metal ion complexes with VO2+ and Cu2+ indicate oxygen as metal ions ligand atoms.
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Mangrich, A. S., Angelo, L. C., & Mantovani, K. M. (2013). Biochar produced from chemical oxidation of charcoal. In Functions of Natural Organic Matter in Changing Environment (Vol. 9789400756342, pp. 997–1001). Springer Netherlands. https://doi.org/10.1007/978-94-007-5634-2_184
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