Abstract
The influence of thermo- and mechanochemical modification of mineral shungite-III (Karelia, Russia) on its chemical composition and physicochemical properties has been studied. A method has been proposed for the mechanochemical modification of shungite, which yields a finely dispersed sorbent with a specific surface area of 70.6 m2/g, a total pore volume of 0.336 cm3/g, and a carbon concentration of higher than 75%. The comparative analysis of the thermolysis of the mineral and modified shungites in air has revealed a difference between the thermal stabilities of the samples. Almost all of the carbon of modified finely dispersed shungite combusts below 500°C, whereas the decomposition of mineral shungite starts above 600°C and only 60% of carbon combusts at 800°C.
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Original Russian Text © I.A. Polunina, V.V. Vysotskii, I.N. Senchikhin, K.E. Polunin, I.S. Goncharova, G.A. Petukhova, A.K. Buryak, 2017, published in Kolloidnyi Zhurnal, 2017, Vol. 79, No. 2, pp. 192–197.
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Polunina, I.A., Vysotskii, V.V., Senchikhin, I.N. et al. The effect of modification on the physicochemical characteristics of shungite. Colloid J 79, 244–249 (2017). https://doi.org/10.1134/S1061933X17020107
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DOI: https://doi.org/10.1134/S1061933X17020107