Abstract
The effect of alkaline extraction parameters on the yield, biological activity, and functional group composition of the humic acids (HAs) of brown coals was investigated. It was found that the functional group composition of the HAs can be intentionally affected by varying alkaline extraction parameters (the amount of an alkali and the duration and temperature of the process). The biological activity of humic preparations in the form of sodium humates as functions of the following structural group parameters was determined: the degree of aromaticity ( fa) and a parameter reflecting the ratio between aromatic and aliphatic fragments in the organic matter of humic acids ( fa/al). It was established that the milder the conditions of alkaline extraction, the lower the yield of HAs, but the higher their degree of aromaticity ( fa) and biological activity.
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REFERENCES
Votolin, K.S., Zherebtsov, S.I., and Ismagilov, Z.R., Vestn. Kuzbass. Gos. Tekh. Univ., 2016, no. 6, p. 169.
Votolin, K.S., Zherebtsov, S.I., and Smotrina, O.V., Khim. Interesakh Ustoich. Razvit., 2017, no. 25, p. 351.
Zherebtsov, S.I. and Ismagilov, Z.R., Solid Fuel Chem., 2012, vol. 46, no. 6, p. 339. doi 0146https://doi.org/10.3103/S036152191206
Zherebtsov, S.I., Tr. nauchno-tekhnicheskoi konferentsii (Proc. Sci.-Tech. Conf.), Kemerovo: Izd. Inst. Uglya i Uglekhimii Sib. Otd. Ross. Akad. Nauk, 1998, p. 258.
Kukharenko, T.A., Khim. Tverd. Topl. (Moscow), 1976, no. 2, p. 24.
Patteisky, K. and Teichmuller, M., Brennstoff-Chemie, 1960, vol. 41, no. 3, p. 127.
Kasatkin, A.G., Osnovnye protsessy i apparaty khimicheskoi tekhnologii (Basic Processes and Apparatuses of Chemical Technology), Moscow: Gos. Nauchno-Tekhn. Izd. Khim. Lit., 1961.
Taits, E.M. and Andreeva, I.A., Metody analiza i ispytaniya uglei (Methods for the Analysis and Testing of Coals), Moscow: Nedra, 1983.
GOST (State Standard) 9517-94 (ISO 5073-85): Solid Fuel: Methods for the Determination of the Yield of Humic Acids.
Kalabin, G.A., Kanitskaya, L.V., and Kushnarev, D.F., Kolichestvennaya spektroskopiya YaMR prirodnogo organicheskogo syr’ya i produktov ego pererabotki (Quantitative NMR Spectroscopy of Natural Organic Raw Materials and Their Conversion Products), Moscow: Khimiya, 2000.
Kalaitzidis, S., Georgakopoulos, A., Christanis, K., and Iordanidis, A., Geochim. Cosmochim. Acta, 2006, vol. 70, p. 947.
Mao, J-D., Schimmelmann, A., Mastalerz, M., Hatcher, P.G., and Li, Y., Energy Fuels, 2010, no. 24, p. 2536.
Zherebtsov, S.I., Malyshenko, N.V., Smotrina, O.V., Lyrshchikov, S.Yu., Bryukhovetskaya, L.V., and Ismagilov, Z.R., Khim. Interesakh Ustoich. Razvit., 2015, vol. 23, no. 4, p. 439.
Karamysheva, F.N. and Zhuchkova, A.N., Metodicheskie rekomendatsii po planirovaniyu eksperimenta v tekhnologii stroimaterialov (Guidelines for Experimental Design in Building Materials Technology), Chelyabinsk: UralNIIstromproekt, 1973.
Box, M.J. and Draper, N., R, Technometrics, 1971, vol. 13, no. 4, p. 731.
Draper, N.R. and Smith, H., Applied Regression Analysis, New York: Wiley, 1966.
GOST (State Standard) 12038-84: Crop Seeds: Methods for Determining Germination, Moscow: Izd. Standartov, 1984, p. 30.
Votolin, K.S., Zherebtsov, S.I., and Smotrina, O.V., Khim. Interesakh Ustoich. Razvit., 2017, no. 25, p. 351.
Voronina, L.P., Yakimenko, O.S., and Terekhova, V.A, Agrokhimiya, 2012, no. 6, p. 50.
Funding
This work was supported by the Russian Foundation for Basic Research (grant no. 18-55-91033) and performed with the use of the equipment of the Center of Collective Use at the Federal Research Center of Coal and Coal Chemistry, Siberian Branch, Russian Academy of Sciences.
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Translated by V. Makhlyarchuk
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Zherebtsov, S.I., Votolin, K.S., Malyshenko, N.V. et al. Optimal Parameters for the Production of Humic Acids from Brown Coals with Specific Structural-Group Composition. Solid Fuel Chem. 53, 253–261 (2019). https://doi.org/10.3103/S0361521919050124
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DOI: https://doi.org/10.3103/S0361521919050124