Abstract
An electron-microscopic study was conducted of gel films collected from aggregates from humus-accumulative horizons of chernozem and soddy-podzolic soils. The aggregates were dried and then capillary-wetted and immersed in water, Solutions obtained by pressing from these soils were also studied. Based on the results obtained, a hypothetical mechanism was proposed for the development of fractal organization of soil colloids, which involves the fixation of micron-size mineral particles in the humus gel and their transformation under the effect of aggressive substances with the formation of colloidal particles of reaction products diffusing in the humus gel. Humus macromolecules contain many polar groups; therefore, the colloidal particles pass some distance and are then fixed on these groups. The greater the distance from a coarse particle in the center of a cluster the smaller the number of colloidal particles capable of traversing it. Therefore, the concentration of colloidal particles decreases when going from the cluster center to its periphery according to an exponential law, which results in the development of the fractal organization in the colloidal soil component. Results of soil studies using the small-angle neutron scattering method were analyzed in terms of the hypothesis proposed.
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References
A. A. Vertegel, Candidate’s Dissertation in Chemistry (Moscow, 1996).
P. V. Vershinin, Soil Structure and Its Formation Conditions (Akad. Nauk SSSR, Moscow, 1958) [in Russian].
S. S. Voyutskii, Solutions of High-Molecular Compounds (Goskhimizdat, Moscow, 1960) [in Russian].
H. H. Henisch, Crystal Growth in Gels (London, 1970).
G. A. Lipson and T. S. Kolodieva, “Studying the Hydration of Clastogenic Quartz,” Kolloidn. Zh. 34, 235 (1972).
Soil Science, Ed. by I. S. Kaurichev (Kolos, Moscow, 1975) [in Russian].
I. B. Revut, Soil Physics (Kolos, Leningrad, 1972) [in Russian].
D. I. Svergun and L. A. Feigin, Small-Angle X-ray and Neutron Scattering (Nauka, Moscow, 1986) [in Russian].
A. G. Solov’ev, T. M. Solov’eva, A. V. Stadnik, et al., SAS: Program for Primary Processing Small-Angle Spectra. Ver. 2.4. Description and User’s Manual (Dubna, 2003) [in Russian].
J. Feder, Fractals (Plenum, New York, 1988).
G. N. Fedotov, Doctoral Dissertation in Biology (Moscow, 2006).
G. N. Fedotov, Yu. D. Tret’yakov, G. V. Dobrovol’skii, et al., “Colloidal Structures in Soils,” Dokl. Akad. Nauk 404(3), 352–354 (2005).
G. N. Fedotov, Yu. D. Tret’yakov, V. K. Ivanov, et al., “Fractal Structures of Colloidal Formations in Soils,” Dokl. Akad. Nauk 404(5), 638–641 (2005).
G. N. Fedotov, Yu. D. Tret’yakov, V. K. Ivanov, et al., “Fractal Colloidal Structures in Soils of Different Zones,” Dokl. Akad. Nauk 405(3), 351–354 (2005).
G. N. Fedotov, Yu. D. Tret’yakov, V. I. Putlyaev, et al., “Electron-Microscopic Study of Colloidal Structures in Soils,” Dokl. Akad. Nauk 403(2), 205–207 (2005).
G. N. Fedotov, Yu. D. Tret’yakov, V. I. Putlyaev, et al., “Refining the Ideas of Soil Gel Structure,” Dokl. Akad. Nauk 411(2) (2006).
R. B. Grossman and W. C. Lynn, “Gel-Like Films That May Form at the Air-Water Interface in Soils,” Soil Sci. Am. Proc. 31 (1967).
H. Lauwerier, Fractals, Images of Chaos (Penguin, London, 1991).
B. B. Mandelbrot, The Fractal Geometry of Nature (Freeman, New York, 2000).
W. G. Rothschild, Fractals in Chemistry (Wiley, New York, 1998).
J. P. Tence, R. Chevalier, and R. Jullien, “On the Measurement of the Fractal Dimension of Aggregated Particles by Electron Microscopy: Experimental Method, Correction, and Comparison with Numerical Model,” J. Phys. 47, 1989–1998 (1986).
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Original Russian Text © G.N. Fedotov, G.V. Dobrovol’skii, V.I. Putlyaev, E.I. Pakhomov, A.I. Kuklin, A.Kh. Islamov, 2007, published in Pochvovedenie, 2007, No. 1, pp. 823–830.
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Fedotov, G.N., Dobrovol’skii, G.V., Putlyaev, V.I. et al. Physicochemical principles of the fractal organization of soil colloids. Eurasian Soil Sc. 40, 740–746 (2007). https://doi.org/10.1134/S1064229307070058
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DOI: https://doi.org/10.1134/S1064229307070058