Inhibition by nitrite ion in the process of methane anaerobic oxidation by microorganisms and fractionation dynamics of stable carbon and hydrogen isotopes
详细信息 查看全文
- 作者：V. A. Vavilin ; S. V. Rytov
- 刊名：Water Resources
- 出版年：2016
- 出版时间：July 2016
- 年：2016
- 卷：43
- 期：4
- 页码：663-667
- 全文大小：392 KB
- 刊物类别：Earth and Environmental Science
- 刊物主题：Earth sciences
Hydrogeology
Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
Russian Library of Science - 出版者：MAIK Nauka/Interperiodica distributed exclusively by Springer Science+Business Media LLC.
- ISSN：1608-344X
- 卷排序：43
文摘
In the process of methane oxidation by nitrite ion, the latter, when in high concentration, inhibits the oxidation process. The effect of inhibition is incorporated in the proposed model, describing the dynamics of anaerobic oxidation of methane and its heavy fractions δ13CH4 and δC2H1H3 by nitrite ion. Two substrates—methane and nitrite—are considered in a modified Monod function, describing the oxidation rate. The model is calibrated against experimental data given in [8]. The dynamic behavior of the system under a deficiency of methane or nitrite ion is described. The dynamics of δ13CH4 and δC2H1H3 are shown to be governed by the oxidation dynamics of total methane CH4. By contrast to the conventional opinion that Rayleigh equation corresponds to 1st-order kinetics in terms of substrate concentration, this study shows that Rayleigh equation can be derived from dynamic equations for methane with heavy isotopes (13C and 2H), whatever the kinetic type of total methane oxidation.Keywordsanaerobic methane oxidationnitrite inhibitionstable carbon and hydrogen isotopeskinetic effect of fractionationRayleigh equationmathematical model