Abstract
The regularities of extracting humus acids from soils of different types with solutions of sodium pyrophosphate at the equilibrium pH values of 5–13 were studied. The increase in the humus acids yield from the soils with the increasing alkalinity of the solution applied is directly related to the capability of acid functional groups (carboxyl and phenol hydroxyl) for dissociation at definite pH values. The regularities of the changes in the chemical nature and degree of humification of humus acids extracted from the soils related to the pH of the solution were revealed. A sodium pyrophosphate solution (pH 10) was suggested for extracting the humus acids most active in the given soil.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
L. N. Aleksandrova, “On the Use of Sodium Pyrophosphate for Isolation of Free Humic Substances and Their Organomineral Compounds from Soils,” Pochvovedenie, No. 2, 32–43 (1960).
L. N. Aleksandrova, Soil Organic Matter and the Processes of Its Transformation (Nauka, Leningrad, 1980).
T. V. Drozdova, “Spectrophotometric Method of Determination of Humic Acids in Peat and Peat-Podzolic Soils,” Pochvovedenie, No. 7, 81–91 (1959).
K. V. D’yakonova, “Transformation of Soil Organic Matter upon Agricultural Use and Amelioration of Soils,” in Recommendations for Studying the Budget and Transformation of Organic Matter in Intensively Managed Agricultural Soils (Izd. VASKhNIL, Moscow, 1984), pp. 27–34 [in Russian].
I. D. Komissarov, I. I. Vilenskii, and O. I. Fedchenko, “Extraction of Humic Substances from Organic Deposits,” in Humic Preparations Nauchn. Tr. Tyumensk. Sel’skokhoz. Inst. 14, 10–33 (1971).
M. M. Kononova and N. P. Bel’chikova, “Rapid Methods for Determining the Composition of Humus,” Pochvovedenie, No. 10 (1961).
T. A. Kukharenko, “On the Molecular Structure of Humic Acids,” in Humic Acids in the Biosphere (Nauka, Moscow, 1993), pp. 27–35 [in Russian].
T. A. Kukharenko and R. Ya. Tolchinskaya, “Determination of the Content of Humic Acids in Brown Coal by the Pyrophosphate Method,” in Materials of the X All-Union Geological Workshop, No. 7, 149–155 (1965) [in Russian].
D. S. Orlov, Soil Humic Acids and the General Theory of Humification (Izd. Mosk. Gos. Univ., Moscow, 1990) [in Russian].
D. S. Orlov and N. N. Osipova, “Relative Stability of Humic Substances according to Their Electronic and Molecular Spectra,” in Humic Substances in the Biosphere (Nauka, Moscow, 1993), pp. 227–232 [in Russian].
N. E. Orlova, L. G. Bakina, and E. N. Orlova, Methods for Studying the Content and Composition of Humus (Izd. St.-Peterb. Gos. Univ., St. Petersburg, 2007) [in Russian].
T. A. Plotnikova, “Characterization of the Specific Features of the Origin and Nature of Humic Substances on the Basis of Data on Their Optical Density,” in Geography, Genesis, and Fertility of Soils, (Kolos, Leningrad, 1972), No. 5, pp. 196–200 [in Russian].
V. V. Ponomareva and T. A. Plotnikova, Humus and Soil Formation (Methods and Results of the Study) (Nauka, Leningrad, 1980) [in Russian].
V. V. Ponomareva and T. A. Plotnikova, “On the Comparative Diagnostics of Gray and Brown Forest Soils,” Pochvovedenie, No. 1, 33–40 (1976).
T. A. Plotnikova and V. V. Ponomareva, “A Simplified Variant of the Method to Determine Optical Density of Humic Substances with a Single Light Filter,” Pochvovedenie, No. 7, 73–85 (1967).
V. A. Chernikov, “The Study of Structural Features of Humic Compounds in Soils of Long-Term Experimental Plots by a Set of Physicochemical Analytical Methods,” in The Effect of Long-Term Fertilization on the Soil Organic Matter (VNIIA, Moscow, 2010), pp. 80–123 [in Russian].
S. N. Chukov, The Structural-Functional Parameters of Organic Matter of Soils Subjected to Anthropogenic Loads (Izd. St. Peterb. Gos. Univ., St. Petersburg, 2001) [in Russian].
A. A. Shinkarev, M. K. Latypov, K. T. Giniyatullin, and M. G. Khramchenkov, “Fractional Dissolution in Studying the Affinity of Organic Matter to Mineral Soil Components,” Pochvovedenie, No. 1, 1331–1341 (2006) [Eur. Soil Sci. 39 (11), 1198–1207 (2006)].
Z. Chen and S. Pawluk, “Structural Variations of Humic Acids in Two Sola of Alberta Mollisols,” Geoderma 65(3–4), 173–193 (1995).
K. Kumada, Chemistry of Soil Organic Matter (Elsevier, Amsterdam, 1987).
G. Ricca, L. Federico, C. Astori, and R. Gallo, “Structural Investigation of Humic Acid from Leonardite by Spectroscopic Methods and Thermal Analysis,” Geoderma 57(3), 263–274 (1993).
M. Simon, I. Garcia, C. Gil, and A. Polo, “Characteristics of the Organic Matter of Mediterranean High-Mountain Soils,” Geoderma 61(1, 2), 119–131 (1994).
E. Welte, “Neuere Ergebnisse der Humusforschung,” Angew. Chemie, No. 5, 67–75 (1955).
Author information
Authors and Affiliations
Additional information
Original Russian Text © L.G. Bakina, N.E. Orlova, 2012, published in Pochvovedenie, 2012, No. 4, pp. 445–452.
Rights and permissions
About this article
Cite this article
Bakina, L.G., Orlova, N.E. Special features of humus acids extraction from soils by sodium pyrophosphate solutions of different alkalinity. Eurasian Soil Sc. 45, 392–398 (2012). https://doi.org/10.1134/S1064229312040023
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1064229312040023