Abstract
Methodological and experimental studies of the abiotic uptake of gaseous substances by organic soils were performed. The static adsorption method of closed vessels for assessing the interaction of gases with the solid and liquid soil phases and the dynamic method of determining the sorption isotherms of gases by soils were analyzed. The theoretical substantiation of the methods and their practical implementations on the basis of a PGA-7 portable gas analyzer (Russia) were considered. Good agreement between the equilibrium sorption isotherms of the gases and the Langmuir model was revealed; for the real ranges of natural gas concentrations, this model can be reduced to the linear Henry equation. The limit values of the gas sorption (Langmuir monolayer capacity) are typical for dry samples; they vary from 670–4000 g/m3 for methane and oxygen to 20 000–25 000 g/m3 for carbon dioxide. The linear distribution coefficients of gases between the solid and gas phases of organic soils (Henry constants) are 8–18 units for poorly sorbed gases (O2, CH4) and 40–60 units for CO2. The kinetics of the chemicophysical uptake of gases by the soil studied is linear in character and obeys the relaxation kinetic model of the first order with the corresponding relaxation constants, which vary from 1 h −1 in wet samples to 10 h −1 in dry samples.
Similar content being viewed by others
References
A. V. Smagin, Gaseous Phase of Soils (Moscow, 2005) [in Russian].
A. V. Smagin, N. B. Sadovnikova, and Mizuri Maauia Ben-Ali. “The Determination of the Primary Hydrophysical Function of Soil by the Centrifuge Method,” Pochvovedenie, No. 11, 1362–1370 (1998) [Eur. Soil Sci. 31 (11), 1237–1244 (1998)].
A. V. Smagin, N. B. Sadovnikova, D. D. Khaidapova, and E. M. Shevchenko, Ecological Assessment of the Biophysical State of Soils (Moscow, 1999) [in Russian].
A. V. Smagin and G. V. Smirnov, “Use of Gas Chromatography to Determine the Sorption Isotherms of Water Vapor by Soil,” Pochvovedenie, No. 9, 155–158 (1991).
A. V. Kiselev and Ya. I. Yashin, Gas-Adsorption Chromatography (Nauka, Moscow, 1967) [in Russian].
Author information
Authors and Affiliations
Additional information
Original Russian Text © A.V. Smagin, 2007, published in Pochvovedenie, 2007, No. 12, pp. 1482–1488.
Rights and permissions
About this article
Cite this article
Smagin, A.V. Abiotic uptake of gases by organic soils. Eurasian Soil Sc. 40, 1326–1331 (2007). https://doi.org/10.1134/S1064229307120095
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1134/S1064229307120095