Open AccessKINETIC ISOTOPIC EFFECT: STATIC RAYLEIGH EQUATION AND BASIC DYNAMIC ISOTOPE EQUATION FOR THE SUBSTRATE IN THE DESCRIPTION OF NITRITE-DEPENDENT ANAEROBIC OXIDATION OF METHANE
Author(s) -
В.А. Вавилин
Publication year - 2021
Publication title -
dinamika okružaûŝej sredy i globalʹnye izmeneniâ klimata
Language(s) - English
Resource type - Journals
eISSN - 2541-9307
pISSN - 2218-4422
DOI - 10.17816/edgcc58932
Subject(s) - kinetic isotope effect , methane , chemistry , nitrite , substrate (aquarium) , isotope , anaerobic oxidation of methane , deuterium , organic chemistry , physics , ecology , atomic physics , nuclear physics , nitrate , biology
The article analyzes the results of modeling the dynamics of nitrite-dependent methane oxidation (N-DAMO) by Methylomirabilis oxyfera microorganisms using the standard isotope dynamic equations. Without specifying a specific function of the rate of the process, the traditional static Rayleigh equation is derived from the basic dynamic isotope equation. Thus, the equation of the 1st order in terms of the substrate is only a special case in the derivation of the Rayleigh equation. It was shown that the dominant fractionation of carbon isotopes occurs in the process of the microbiological reaction of anaerobic oxidation of methane by nitrite, and not in the physical process of mass transfer of dissolved methane into the gas phase. In contrast to the static Rayleigh equation, the dynamic description of the process of fractionation of stable isotopes is important when describing the parallel transformations of the substrate.